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Volume 51 (1982)
- Issue 4 Pages 439-
- Issue 3 Pages 271-
- Issue 2 Pages 151-
- Issue 1 Pages 1-
Volume 51, Issue 3
Displaying 1-20 of 20 articles from this issue
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Il-Doo JIN, Jun INOUYE1982 Volume 51 Issue 3 Pages 271-275
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn order to make clear the reason why there are differences in the grain shedding among varieties of Japonica-Indica hybrid rice, morphology of the abscission region in longitudinal sections of the pedicel was investigated. Also, the strength required to detach rice grain from its pedicel was measured with an unbonded strain gauge transducer and a null balancing recorder. All the examinations were made at harvest time. Experimental materials used were 27 varieties of Japonica-Indica hybrid rice bred in Korea and 7 varieties of their parents. The results obtained are as follows: 1. Degree of grain shedding of Japonica-Indica hybrid rices was similar to that of Indica type parents and weaker than that of Japonica type parents (Table 2). 2. In all the Japonica-Indica hybrid varieties, parenchymatous cells presented in the abscission layer have completely collapsed at the harvest time. Regarding their parents, the parenchymatous cells have collapsed in the Indica type parents such as Peta, IR 8, IR 24, and Taichung native 1, while no abscission layer was observed in the two Japonica type parents, Yukara and Jinheung, and one Indica type parent, Dee-Geo-Woo-Gen. 3. Among the Japonica-Indica hybrid varieties, highly positive correlation was observed between degree of grain shedding and thickness of the supporting zone consisting of the central vascular tissues and the sclerenchymatous cells (Fig. 1, 2 and 3). Since the thickness of the central vascular tissues was almost same among the varieties (mean value: 88±6.6μm), it may be concluded that varieties with the thinner sclerenchymatous tissue situated between the abscission layer and the central vascular bundle are essentially more fragile.View full abstractDownload PDF (650K) -
Il-Doo JIN, Jun INOUYE, Shigeo MATSUMOTO1982 Volume 51 Issue 3 Pages 276-280
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSSoybean varieties in Korea are generally classified into three types, namely, bean sprout (and high oil), grain (high yielding general purpose), and vegetable (used for mixed boiling and as green vegetables). Varietal characteristics in each type were investigated using 72 varieties for bean sprout, 115 for grain and 59 for vegetable types. The results obtained are as follows: 1. One hundred seeds weight was 13±2.5g in the bean sprout type, 22±3.3g in the grain type and in vegetable type it was 22±6.8g. Significant difference was observed between bean sprout and grain types. Variation in 100 seeds weight was larger among vegetable type than the other two types (Fig. 2). 2. According to the days from seeding to first flower anthesis, it seemed that in Korean soybean varieties intermediate type was the most, followed in descending order by autumn type and summer type. In the bean sprout type, frequency of autumn type varieties was higher than in vegetable and grain types (Table 1). 3. Based on the increase in number of nodes on the main stem after first flower anthesis, about 96% of grain type was determinate, while about 10% in each of bean sprout and vegetable types was indeterminate (Table 2).View full abstractDownload PDF (607K) -
Masahiko ICHII1982 Volume 51 Issue 3 Pages 281-286
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
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YOSHITAKA ONO1982 Volume 51 Issue 3 Pages 287-292
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe author examined effects of leaf area index(LAI), specific leaf area(SLA), nitrogen content in leaves (NL), and distribution ratio of dry matter to pod(PD.R) on net assimilation rate(NAR) in the first half of fruiting stage of peanut plants cultivated under six management factors. The results obtained were as follows.: 1. NAR was affected significantly by mulching, planting date, planting density and number of plants per hill (Table 3). 2. The correlations of NAR with LAI, SLA and PD.R were significantly negative, respectively. But, the correlation between NAR and NL was significantly positive (Fig. 1, Table 4). 3. LAI, PD.R and SLA were selected as independent variables in the best regression equation for determining NAR that accounted for 85 percent of the variation of NAR(Table 5). 4. By comparison of the standard regression coefficients in the equation, it was recognized that the relation of the variables to NAR become stronger in the order of SLA, PD.R and LAI (Table 6). 5. In carrying out growth analysis of peanut plants in the fruiting stage, it is necessary to remark PD.R as an important factor affecting NAR.View full abstractDownload PDF (650K) -
Shigeo MATSUMOTO, Ryoichi MATSUNAGA, Tadahiko FURUYA, Go MASUYAMA1982 Volume 51 Issue 3 Pages 293-300
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn soybean there is meager information on response to fertilizer application among different species. Therefore, three experiments were conducted using cultivated soybean, Glycine max (L.) Merrill cv. Akisengoku and wild soybean, G. soja Sieb. et Zucc., K-01 line. The objectives of the investigation are i) to determine the response to the application of N, P, K and Ca under three soil types, namely, sandy soil, upland field soil and paddy field soil (Exp. 1) and ii) to understand the response to nitrogen application in paddy field soil (Exp. 2 and 3). The following results were obtained. 1) Effect of major nutrient application on the vegetative growthes and seed yields of cultivated and wild soybeans varied with soil types. The fertilizer responses were dramatic in sandy soil, slight in upland field soil and paddy field soil especially on K-01 line although their vegetative growthes were much better than in sandy soil (Table 3, 4). 2) When harvest indices (HI) (seed yield/total top dry weight) were compared, both species had low HI in sandy soil which had very little nutrients. In upland field soil and paddy field soil HI were high and HI of Akisengoku was higher than that of K-01 line. When each total top dry weight of K-01 line and Akisengoku was more than 40 and 80 g/plant, respectively, HI in both species began to decline (Fig. 1). 3) Akisengoku had better vegetative growth response to nitrogen application at early growth stage, but no relation was recognized at flowering stage. Regardless of growth stages K-01 line showed very little or no response (Table 5). 4) The effect of nitrogen application on the seed yield and yield components of Akisengoku was not significant. Yield and yield components decreased in K-01 line in the highest nitrogen treatment. However, in the other treatments no such decrease was observed (Table 8). 5) Nitrogen application inhibited the nodulation at early growth stage in both species. The degree of inhibition was much greater in K-01 line than in Akisengoku. At later growth stage the nodulation of Akisengoku in nitrogen treatments was comparable to no nitrogen treatment. But the nodulation of K-01 line in the highest nitrogen treatment was not good, compared with the other treatments. Therefore, the seed yield of K-01 line in the highest nitrogen treatment decreased (Table 6, 8).View full abstractDownload PDF (867K) -
Genichi HIRAI, Akira SUZUKI, Makoto TAKAHASHI, Akiko YAMAUCHI, Eiji UE ...1982 Volume 51 Issue 3 Pages 301-309
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSWe grew the paddy rice from seeding time under the conditions of controlled environment in order to reveal the influence of the humidity of the atmosphere over its growth and physiology by observing how the relative humidity changed its leaf-emergence rate and leaf morphology. The obtained results were as follows: 1. The leaf-emergence rate was greater under the condition of more moist atmosphere than that of drier one. 2. The distance between the vascular bundles, the area of the mesophyll, vascular bundle and epidermis, the size of the motor cell, and the thickness of the mesophyll and epidermis were greater under the condition of dry atmosphere than that of standard atmosphere (75% of relative humidity). On the other hand, the plants grown in a relatively moist atmosphere had a larger mesophyll system and smaller epidermis system than those grown in the standard atmosphere. 3. The rice plants grown in dry atmosphere had a morphology similar to that of the plants raised under the condition of relatively low temperature and strong light, while plants cultivated in the moist atmosphere were similar to those with heavy nitrogen application.View full abstractDownload PDF (823K) -
Takeshi TANABE1982 Volume 51 Issue 3 Pages 310-315
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSFor stable and high-yielding rice cultivation by direct sowing method, it is necessary to develop new technology for growth control of rice plants which can make up for defects peculiar to the direct sowing culture. As one of the promising methods for the above purpose, root-cutting treatment on rice plants at the early growth stage has been regarded effective. In the present paper the root-cutting treatment is dealt in the light of morphology and ecology of rice plants. The direct sown plants were grown under upland field condition and rice roots were cut 40-45 days after sowing, and afterward paddy soil was irrigated. Cutting of roots was done on both sides or one side at an angle of 20°-40° to the ground surface. The result are summarized as follows: 1. Roots cutting treatment decreased water absorption and transpiration and brought about so severe water stress on the plant that wilting of leaves lasted for about ten days. 2. As to the relationship between the time of root-cutting treatment and that of tiller bud emergence, the treatment after shooting of tiller bud from the main culm did not have any growth control effect on the plant, whereas the treatment before tiller bud can be recognized checked tillering. Root-cutting after the tiller bud was observed retarded the emergence of the secondary tiller. Intensive root-cutting treatment affected roots development, stimulating new thick roots to grow, while slight root-cutting treatment increased branched roots to shoot vigorously out of the old remaining roots. 3. The root-cutting treatment shortened the lower(4th) internode of the plant and thickened culm wall, consequently contributing to the increase of breaking strength and lodging resistance of the plant. 4. Besides such advantageous effect of root-cutting treatment as control of luxuriant plant growth and excessive tillering, the experiment demonstrated that the plant-type was improved to be erect and especially the angle of foliage leaf to main stem axis was decreased which are an important character for rice plants to intercept sunlight sufficient for dry matter production. 5. In the root-cutting experiment, increase of the number of stomatal cells in the upper leaves and decrease of their size were observed at the ripening stage. Such changes suggest that hardening of the plant developed. The phenomenon is considered as an after-effect of water stress to root-cutting.View full abstractDownload PDF (646K) -
Takeshi TANABE1982 Volume 51 Issue 3 Pages 316-324
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn order to make clear thc mode of the occurrence of favorable effect of root-cutting treatment on the growth behavior of direct sown rice plants, several pot experiments were carried out from the view point of stress physiology. Result of the experiments and conclusion on causes of the occurrence of beneficial effect of root-cutting treatment as obtained from the first and second reports are summarized as follows: 1. Root-cutting treatment on the plants grown by direct sowing culture in well-drained paddy field brought about decreases in stomatal aperture, transpiration, and consequently, water stress on the plant due to lack of water balance, which is seen in the decrease of water content in the leaf and wilting of leaves. The investigation revealed that ethylene production increased in the plant body due to the water stress. 2. Root-cutting inhibited the production of cytokinin in the roots and checked its translocation to the plants grown above the ground surface, resulting in the decrease of chlorophyll content and increase of ethylene production in the leaf. Further investigation revealed that increase of ethylene production by the root-cutting treatment can be prevented by treating the leaves with kinetin solution. 3. The increase in ethylene production by root-cutting is due to water stress and inhibition of cytokinin translocation. It also lowers chlorophyll content in the leaf. However, as new roots emerged seven to ten days after the root-cutting treatment, absorption of nitrogen by roots increased along with reactivated cytokinin translocation. In consequence, chlorophyll content regained its level and after that it became higher than that in the control, and number of fresh leaves increased until later growing stages. 4. After the root-cutting treatment, physiological activity of thc roots, namely, oxidizing ability of α-Naphtylamine, was greatly enhanced due to the emergence of thick new roots and branched roots from the old remaining roots, which had also been accelerated by the treatment. This root activity lasted until the later growth stages. 5. The present experiment also suggested that thc increase of breaking strength which enhanced lodging resistance, observed in the previous report was presumably caused by the increase in ethylene produced in the plant until the later growth stages. 6. It was found that in the treated plants, physiological activity of the upper leaves to adapt themselves to drought condition was enhanced at the maturing stage; this was observed in the decrease of water content in upper leaves and of transpiration rate per unit leaf area, increase of diffusion pressure deficit (D P D) in the leaf blade, and of osmotic pressure in the cell, and decline of water potential in the leaf blade and panicle. The above-mentioned morphological, physiological and ecological changes in the rice plant induced by root-cutting treatment are reflections of water stress and of the changes of plant hormonal behaviour due to the treatment, which resulted in better ripening and increased yield of the rice plants.View full abstractDownload PDF (925K) -
Akio MATSUZAKI, Kunio KARIYA, Hiroyasu MACHIDA, Kosei TSUNODA, Yoshika ...1982 Volume 51 Issue 3 Pages 325-331
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
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Nobuyuki KASAKI, Koichi TAJIMA1982 Volume 51 Issue 3 Pages 332-337
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn the previous paper5), phosphorus deficiency in rice plant caused the specific decrease of photorespiratory activity both in gas exchange (P3/P21) and enzyme activities (ratio of RuBP oxygenase to carboxylase). To elucidate the mechanism of this phenomenon, RuBP carboxylase-oxygenase from control and phosphorus deficient plants were purified and investigated. Fresh leaves were ground in a mortar and the extracts were precipitated with ammonium sulfate (30 to 50% saturation). The precipitate was applied to a sepharose 6B column and the eluted peak fractions with RuBP carboxylase activity were stored at -20°C for the subsquent assay. RuBP carboxylase was assayed by measuring the rate of 14C incorporation into acid-stable products in the reaction mixture containing 100 mM BICINE (pH 8.2), 1 mM DTT, 20 mM MgCl2, 40 mM NaH14CO3(0.25 μCi/μmole), 1 mM RuBP and the enzyme. RuBP oxygenase was assayed by an oxygen electrode. Reaction mixture was as the same as carboxylase with the exception of NaH14CO3 depletion. Both carboxylase and oxygenase assay were initiated at 30°C by addition of the enzyme previously activated with MgCl2 and NaHCO3. The results obtained were as follows: 1. The frozen enzyme was fully activated by preincubation for more than 20 minutes at 30°C in the presence of MgCl2 and NaHCO3. High temperature (40 and 50°C) inactivated the enzyme (Fig. 1). 2. The mode of enzyme activation with MgCl2 and NaHCO3 was quite similar in control and phosphorus deficient plants (Fig. 3). 3. The pH curve of the enzyme reaction from phosphorus deficient plant was identical to that from control plant in both carboxylase and oxygenase assay. As the results, the ratio of oxygenase to carboxylase showed approximately the same value with each other at any pH (Fig. 4). 4. The Km(CO2) of carboxylase from both control and phosphorus deficient plants showed almost the same value in various O2 concentration of gas phase. Vmax was also identical with each other (Fig. 5). From these results, it was suspected that the decrease of the photo-respiratory activity observed in the phosphorus deficient rice leaves didn't reflect the varied nature of RuBP carboxylase-oxygenase. The environment surrounding the enzyme seemed to be responsible for the variation.View full abstractDownload PDF (579K) -
Shunpei KANO, Shohachi MURASATO, Tuyosi IMURA1982 Volume 51 Issue 3 Pages 338-342
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSGross morphology and cell division frequency in the shoot apices of orchardgrass were investigated during the winter season. Increase in the length of apical dome was observed in early December but was not obvious in the other period until March (Fig. 4). Mean cell size constituting apical dome increased except the period between January 1 and February 1 (Fig. 5). Cell division frequency in the apical dome decreased since December and reached the lowest level at the middle of January, but dividing cells were found at this time. After the middle of January the frequency increased again (Fig. 6). Though gross morphological changes of the shoot apex was not obvious, increase in cell size and in cell division frequency after February 1 indicated the development of the shoot apex during the winter season.View full abstractDownload PDF (597K) -
Kanoe SATO, Teiji NAKAMURA1982 Volume 51 Issue 3 Pages 343-348
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSEpidermal tissue system in terminal leaflet of the first trifoliate leaf of soybean plant (cv. Raiden) was observed by clearing method, SUMP method and paraffin method. Four types of cells, i.e. stomata (guard cells), ordinary epidermal cells, setaceous trichomes and clavate trichomes were recognized in the epidermis. There were many stomata on both adaxial and abaxial epidermis covering mesophyll tissue, but few on epidermis above vein in which bundle sheath extention (BSE) developed until epidermis (Fig. 1, 2). Stomatal density (number of stomata per unit leaf area) in abaxial surface was higher than that in adaxial surface (Fig. 9). In both surfaces it was highest at the middle part of the leaf blade near the midvein and low at the leaf top, base and margin (Fig. 9). Setaceous and clavate trichomes were present mainly on both adaxial and abaxial epidermis above veins around which BSE developed and touched with the epidermis, where the basal cells of these trichomes came in contact with the BSE (Fig. 2, 4, 6, 7). The number of both trichomes per unit midvein length in abaxial epidermis was approximately twice that in adaxial epidermis, and in both sides of midvein the number was largest at the middle position of it (Table 1). Many setaceous trichomes were present also at the leaf margin (Fig. 3, 5). When soybean plants were exposed to dark with saturated air humidity, many water drops were identified on both surfaces of leaf blades (Fig. 8) and the distribution of them coincided with that of clavate trichomes. These results suggested an excessive water of leaf be exuded out through the following pathway; xylem→bundle sheath→bundle sheath extention→clavate trichome, where the last trichome acts as a hydathode. It was also suggested that setaceous trichomes too may play a role in water physiology of young leaves.View full abstractDownload PDF (1478K) -
Seok Weon SEO, Yasuo OTA1982 Volume 51 Issue 3 Pages 349-353
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSLocalization of Si, P, K and Ca in hull during the ripening period was investigated by X-ray analysis. The results obtained are as follows: In the fertile hull Si was not found in the outer epidermis cells but in the part between the epidermis cells and the cuticle. However, 40 days after heading, in the sterile hull, Si was observed not only in the part mentioned above but also in the inner epiderm. Distribution of P, K and Ca was low in the part between the outer epidermis cells and the cuticle where Si was observed but more abundant in other parts as well as in the parenchyma. From these results, it was shown that the translocation of nutrient took place through the parenchyma, and the localization of Si showed a significant correlation with transpiration.View full abstractDownload PDF (643K) -
Seok Weon SEO, Yasuo OTA1982 Volume 51 Issue 3 Pages 354-359
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe relationship between the development of kernel and the morphology of hull, and SiO2 contents of hull were investigated on the grains with different degrees of repening. The results are as follows. 1. Weight of kernel and hull differed depending on the kernel quality among the grains on the primary branches, and both of them were larger in the following order; perfect kernel-grain>milky-white kernel-grain>opaque kernel-grain>abortive grain. These results show that the development of the hull and kernel is bigger in well-developed grains, and that the development of the two relate well with each other. 2. The amount of SiO2 in the hull was higher in well-developed grains. 3. Occurrence of malformed-hull grains was more in the grains with inadequate ripening. More than 70% of the grains with a specific gravity below 1.00 were malformed-hull grains. 4. Malformed-hull grains also occurred more in the grains on the secondary branches than in those on the primary branches. These results strongly suggest the development of the kernel is closely related to the morphology and function of hull. Therefore more attention has to be paid to decrease the malformed hull for increasing percentage of ripened grains.View full abstractDownload PDF (798K) -
Akira MIYASAKA, Takehiko TAKAYA1982 Volume 51 Issue 3 Pages 360-368
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe lodging resistance as affected by dense sowing and the interrelationships of the traits related to the lodging resistance were examined in rice varieties under direct sowing culture on well-drained paddy field. The results obtained were summarized as follows: 1. Under sparse sowing condition (22.2 hills/m2), the severer lodgings were observed in longer culmed varieties. However, under dense sowing condition (200 hills/m2), the chief reason for lodging was the decrease in breaking strength of stem, and the additional one was the elongation of the basal internodes in long-culmed varieties. 2. The elongation of culm by dense sowing was attributed to the lengthening of lower internodes (N3∼N5). In some long-culmed varieties, the breaking internode came to one internode lower than usual by means of the elongation of the lower internode, and this resulted in the decrease of living leaf sheaths wrapped on the culm, which increased the stem strength. 3. By the research on the relationship between breaking strength and other characteristics, the following facts were made clear. (1) The decrease of breaking strength of the stem by dense sowing was related both to that of the culm and to that of the leaf sheath. Of the two, the latter gave larger influence than the former. There could be observed high positive correlation between breaking strength of stem (culm with leaf sheath) and that of leaf sheath. (2) The contribution rate of leaf sheath to breaking strength of stem amounted high, in some varieties attaining as much as 50-60%. This contribution value was shown larger in short-culmed varieties than in long-culmed varieties and greater in lodging resistant varieties than in lodging susceptible ones. Dense sowing made this rate decrease by diminishing the number of living leaf sheath wrapped on the basal internode. (3) Long diameter/short diameter ratio of culm was increased by dense sowing, and there could be observed negative correlation between this ratio and the breaking strength of the culm. Similar results were recognized also in the leaf sheath. (4) Starch grains were noticed in the culm of lodging resistant varieties, however, the effect of dense sowing on starch amount could not be made clear. 4. By multiple regression analysis, high multiple coefficients of correlation were shown between lodging resistance and four characters (plant height, fresh weight, breaking strength and length of lower internode). Also, high ones were observed between breaking strength of culm (also leaf sheath) and three characters (cross-sectional area, long diameter/short diameter ratio and amount of starch in culm), however, these multiple coefficients of correlation became low in long-culmed varieties under sparse sowing condition. 5. The results may be concluded as follows. One of the most effective method to hold lodging resistance larger is to increase both the living number of leaf sheath on the basal internode and the duration period of it, and the other is to inhibit the elongation of the basal internode, especially in long-culmed varieties.View full abstractDownload PDF (1044K) -
Tatsuo OGO, Kazuo SASAI, Katsuhiko ARITA, Minoru FUKUDA1982 Volume 51 Issue 3 Pages 369-374
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThis study has conducted to elucidate the grwoth type of mat rush with higher yielding ability. In this paper, the growth in the different production districts in Japan was discussed as a growth type, and the differences of the determination of yield among the growth types were analyzed. The results are summarized as follows: 1. The growth in the different production districts was distinguished into three types, i.e. the warm region type, the cold region type and the intermediate type. And these types were resulted from the atmospheric temperature in winter and spring: in case of it being warmer in these periods, growth exhibited the warm region type, and in case of it being colder, it did the cold region type. 2. In the warm region type, a hill had a large number of stems at the tillering stage of the long stems and the long stems had emerged in the latter part of May, while in the cold region type, a hill had a small number of stems and the long stems emerged in the first part of June. Among the three growth types, the intermediate type showed the highest yielding ability, and t was suggested that there was a optimal standard of growth at the tillering stage of the long stems. 3. It was implyed that the cultivation techniques in the different production districts aimed at the same standard of growth at the tillering stage of the long stems and the growth of mat rush was controlled through some practices, i.e. time of planting, planting density, size of seedling, nitrogen fertilizer application, water control and so on.View full abstractDownload PDF (679K) -
Tatsuo OGO, Kazuo SASAI, Takeshi KAKIMI, Yukio MARUKAWA1982 Volume 51 Issue 3 Pages 375-379
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn the previous paper, the authors parted the growing season of mat rush into four stages, i.e. the winter stage, the spring stage, the tillering stage of the long stems and the elongation stage of them. This experiment was carried out to clarify the growth stage exceedingly related to the long stem yield among the three stages of the latter and its difference between two types of mat rush cultivar. And the abilities for tillering and stem elongation at each stage were investigated by means of lowering or raising the soil-water temperature in each stage. And also the relationship between the long stem yield and the growth habitat of tillering :ad stem elongation at each stage was studied. The results are summarized as follows: 1. In both the types of cultivar, tillering was most affected at the spring stage by soil-water temperature, and stem elongation was affected to the same extent among the three stages. During the growing period, tillering of "Asanagi" was not so affected as that of "Shimomasuda-zairai", but stem elongation of "Asanagi" was more affected than that of "Shimomasuda-zairai". 2. The number of stems per a hill at harvest time was closely related to the growing at both the spring stage and the tillering stage of the long stems. The ratio of the number of the long stems to the total number of stems per a hill had much to do with the growing at the elongation stage of the long stems in "Asanagi" and at both the tillering stage of the long stems and the elongation stage of them in "Shimomasuda-zairai". Consequently, the long stem yield was closely related to the growing at both the spring stage and the tillering stage of the long stems in "Shimomasuda-zairai". 3. It was suggested that much attention had to be paid to the degree of the growth at the tillering stage of the long stems in the cultivation of mat rush and the optiaml standard of the growth at this stage was fairly smaller in "Shimomasuda-zairai" than in "Asanagi".View full abstractDownload PDF (617K) -
Hiroshi SUGE, Hideo TOKAIRIN1982 Volume 51 Issue 3 Pages 380-385
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
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IWAO NISHIYAMA1982 Volume 51 Issue 3 Pages 386-392
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
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Choji KAWASHIMA, Tetsuya HIRANO1982 Volume 51 Issue 3 Pages 393-394
Published: September 15, 1982
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (361K)
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