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Volume 68 (1999)
- Issue 4 Pages 453-
- Issue 3 Pages 337-
- Issue 2 Pages 179-
- Issue 1 Pages 1-
- Issue Supplement2 Pag･･･
Volume 68, Issue 2
Displaying 1-22 of 22 articles from this issue
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Yasuo UKAI1999 Volume 68 Issue 2 Pages 179-186
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSDownload PDF (1192K) -
Hisayoshi TATSUTA1999 Volume 68 Issue 2 Pages 187-193
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSAnther length, anther width, and number of engorged pollens were reported to have a relationship to cooling injury of rice. The effects of nitrogen application on anther size and number of pollens were studied in a field for two years. Higher basal nitrogen application (tested from 0 to 13 g/m2) resulted in shorter anther length, shorter anther width, and fewer engorged pollens. The top dressing of nitrogen (4 g/m2) applied at the panicle formation stage resulted in shorter anther length, shorter anther width, and fewer engorged pollens compared with top dressings at other stages or with no top dressing. The effects of a top dressing on anther size and on the number of pollens were small when the nitrogen applied was 10 g/m2.View full abstractDownload PDF (789K) -
Ryouji SASAKI, Katsunori GOTOH1999 Volume 68 Issue 2 Pages 194-198
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe rooting and development of transplanted rice seedlings (Oryza sativa L.) are affected by the characters of the seedlings and the amount of damage to roots incurred by transplanting. Experiments were conducted to examine the influences of these factors on the rooting and early growth of transplanted rice nursling seedlings. To obtain these seedlings with different plant ages in leaf number and seedling characters, seedlings were placed in a dark nursery chamber (32°C) for 2 days, then raised for 3-7 days in a temperature-controlled greenhouse set at a day/night cycle 24/19°C under different seeding densities (200g and 300g per nursery box). The seedlings were continuously grown under the same temperature conditions after transplanting. The number of roots at 8 days after transplanting was higher in seedlings with older plant ages compared with younger plants. However, transplanting injury, indicated by the rate of leaf emergence at 0-4 days after transplanting, was observed when the plant age of a transplanted seedling exceeded 2.6 in leaf number. This was primarily due to an imbalance between the total length of the leaf blade and that of the roots. Furthermore, this transplanting injury was aggravated by high-density seeding. These results suggest that the characters of seedling greatly degrade when a plant exceeds an age of 2.6 in leaf number.View full abstractDownload PDF (836K) -
Hiroko CHIBU, Hidejiro SHIBAYAMA, Susumu ARIMA1999 Volume 68 Issue 2 Pages 199-205
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe effects of chitosan application to soil before planting, on the growth of the tops and roots of the seedlings of radish, Raphanus sativus L., radicula group, were investigated. Leaf area and top dry weight of the crop were increased by application of 0.1% chitosan, and were twice as much as those in the untreated-control by application of 0.5% or 1%. Chitosan application promoted the growth of foliage leaves more than that of cotyledons. The lengh of tap roots and the number of first order lateral roots were not affected, but the numbers of first order lateral roots and second order lateral roots which branched from the first ones were increased markedly by chitosan application. The length and density of root hairs were variable, and those of lateral roots were increased by chitosan application.View full abstractDownload PDF (1230K) -
Yuji MATSUE, Takefumi OGATA1999 Volume 68 Issue 2 Pages 206-210
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn this study we examined the relationship between the culm and ear length of productive tillers and the palatability and physicochemical properties of rice. The diameter of the stem, 1000 grain weight, and the culm and ear length for lower nodal productive tillers were large, high, and long, respectively. The overall eating-quality, taste, and stickiness of cooked rice of productive tillers with long culms and ears were superior to those of productive tillers with short culms and ears. Grains on the productive tillers with long culms and ears showed lower protein content, higher amylose content, higher maximum viscosity and breakdown values, and lower H/-H and H/A3 ratio than those on the productive tillers with short culms and ears. Among productive tillers were inversely proportional relationships between 1000 grain weight and protein content, the H/-H ratio, and the H/A3 ratio, and proportinal relationships between 1000 grain weight and amylose content, maximum viscosity, and breakdown values. It was concluded that the variations in physicochemical procerties and differences in palatability among productive tillers were caused by differences in the extent of the grain filling, which was closely related to the culm and ear length. To produce rice with a high and stable palatability, a cultivation technique that secures lower nodal position tillers and tillers of an earlier order is recommended along with the production of higher 1000 grain weight.View full abstractDownload PDF (785K) -
Hiroshi OKADOME, Masayuki KURIHARA, Osamu KUSUDA, Hidechika TOYOSHIMA, ...1999 Volume 68 Issue 2 Pages 211-216
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn the present study, we applied the multiple measurements of physical properties of individual cooked rice grains to the rice samples with different protein contents. Japonica rice cultivars (Hinohikari, Reiho, Yumehikari) were cultivated in the six experimental plots with different nitrogenous fertilizer application. The subject of our study was to establish a method based on the physical properties to discriminate clearly the effects of nitrogenous fertilizer on the protein contents and the palatability. The kinds of compression tests were carried out as multiple measurements. The overall hardness based on the high compression test (compression ratio:90%) was shown to differ with the rice cultivar rather than with the fertilizer condition. On the other hand, the surface hardness based on the low compression test (25%) was shown to have a positive correlation with the protein contents. The surface hardness could distinguish the difference of protein contents among the rice samples of the same cultivar. With the increase of total quantity of the nitrogen fertilizer applied, the surface hardness increased and the "overall evaluation" by the sensory test decreased. The ratio of stickiness and hardness and hardness on the middle compression test (45%) had a higher correlation with the "overall evaluation" than the protein contents. Therefore, it was clarified that the method based on the physical properties could discriminate the effect of the nitrogenous fertilizer on the protein contents and the palatability.View full abstractDownload PDF (911K) -
Akiko SATO, Miwako KOWATA, Shingo NAKAMURA, Mitsuru WATANABE1999 Volume 68 Issue 2 Pages 217-233
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe effects of nitrogen dressing at different growing stages on baking quality were investigated by using the winter wheat breeding line Tohoku205. The relation between flour protein content and ratio of loaf volum to weight were also investigated by using three winter wheat varieties. In Tohoku205, nitrogen dressing from the time snow had melted to one week after the anthesis increased flour protein content, sedimentation test value, development time, stability, and valorimeter value of farinogram, extensibility of extensogram, the ratio of loaf volume to weight and the whiteness of crumb. As flour protein content increased to 12%, the ratio of loaf volume to weight increased in Tohoku205, Koyukikomugi and Nanbukomugi harvested at several prefectures in the Tohoku and Hokuriku districts.View full abstractDownload PDF (989K) -
Kenji KATAYAMA, Seiji TAMIYA1999 Volume 68 Issue 2 Pages 224-230
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTo estimate the maturing period of the storage root based on the quality of sweet potato, we analyzed the changes in quality of eight Japanese major cultivars during the growth period in 1988 and 1989. The storage roots of Healthy Red, Koganesengan, Okinawa 100, and Beniazuma showed early bulking. The analysis of variance showed significant differences among cultivars and growing period in root yield, root size, dry matter content, brix in raw and steamed roots, sucrose content in raw roots, glucose content in raw roots, and palatability. Significant interactions between cultivars and growing periods were observed in these seven characters except for brix in steamed roots. At most of the days of harvest, palatability was significantly and positively correlate with dry matter content (r≥0.8) and brix in steamed roots. At a few days of harvest, palatability was significantly and positively correlated with the brix and sucrose content in raw roots, but not with root yield, root size, and glucose content. Thus, maturing periods for quality may be estimated from the increasing pattern of dry matter content. Based on the increasing pattern of dry matter content, Healthy Red, Fusabeni, and Benikomachi were classified into early-maturing type, Beniaka, Okinawa 100, and Kokei 14 into medium-maturing type, and Beniazuma and Kognesengan into late-maturing type.View full abstractDownload PDF (961K) -
Ritsuko Mizobuchi-FUKUOKA, Minoru NISHIMURA, Tsugufumi OGAWA, Ryota KA ...1999 Volume 68 Issue 2 Pages 231-234
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn order to breed highly palatable cultivars suitable for direct sowing in rice, we tried to incorporate the genes for low-temperature-germinability into highly palatable Japanese cultivars and selected excellent backcrossed lines with low-temperature-germinability. First, we examined ten Japanese cultivars and ten foreign cultivars for their low-temperature-germinability (the proportion of the germination rate at 15°C to that at 25°C after 7 days of incubation) and found that most of the foreign cultivars which were directly sown in their own countries were extremely useful as donors of low-temperature-germinability. Secondly, we developed five backcrossed BC2F2 populations (Koshihikari 3/M202, Hinohikari 3/M202, Koshihikari 3/Italica Livorno, Koshihikari 3/Mutashali and Kinuhikari 3/Mutashali) and selected them for low-temperature-germinability. From all populations, we obtained the lines superior to each recurrent parents. In particular, from Koshihikari 3/M202 (66 lines), Hinohikari 3/M202 (51 lines) and Koshihikari 3/Mutashali (51 lines), we obtained eight, eleven and one line, respectively, which showed excellent (over 81%) low-temperature-germinability. Then we picked out these excellent lines (Hinohikari 3/M202) as donors of futher back-crossing. Finally, we developed backcrossed BC3F2 lines (Hinohikari 4/M202, 35lines) and selected five excellent lines with high low-temperature-germinability. In conclusion, it would be possible to breed highly palatable cultivars suitable for direct sowing by introducing low-temperature-germinability derived from foreign cultivars such as M202 into good eating-quality cultivars.View full abstractDownload PDF (681K) -
Eiki KURODA, Naokuni HIGASHI, Takashi OKADA, Shin ABE, Mitsugu HIRANO, ...1999 Volume 68 Issue 2 Pages 235-244
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTo clarify the high yielding characteristics of new rice varieties recently bred in the cold region of Japan, we examined their yielding ability, yield component and harvest index in 1996 (24 varieties) and 1997 (21 varieties) in comparison with those of four popular varieties refistered after 1970 in the Tohoku region. The grain yield of these varieties was 716∼845 g/m2 in 1996 and 696∼799 g/m2 in 1997, and the difference among the rice varieties was 100∼130 g/m2 in both years. Twenty varieties of the new rice varieties recorded more than 750 n/m2 grain yield in 1996 and 15 varieties in 1997. Compared with popular varieties, the new rice varieties were classified into four groups:1) the varieties having a larger sink due to larger number of spikelets per m2, including Ouu 316 and Ouu 339, 2) the varieties having a larger sink due to a heavier grain weight and similar number of spikelets per m2, including Fukuhibiki, Akita 59 and Manamusume, 3) the varieties having a similar sink size due to a heavier grain weight but smaller number of spikelets per m2, including Okiniiri and Iwanan 6 and 4) the varieties having a similar sink showing a similar number of spikelets per m2 and similar grain weight, including Hananomai and Jyoudeki. These results suggest that in order to breed high yielding rice varieties in the cold region of Japan, we must enlarge the sink capacity by either increasing the number of spikelets per m2 or incresing the grain weight maintaining a similar number of spikelets per m2.View full abstractDownload PDF (1543K) -
Zaibin HAO, Masahiko ICHII1999 Volume 68 Issue 2 Pages 245-252
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSWe screened a large population of rice (Oryza sativa L., cv. Oochikara) M2 seeds treated with NaN3 to select mutants resistant to exogenously applied 2, 4Dichlorophenoxyacetic acid (2, 4-D). A resistant line, RM109, was idenified, and its resistance to 2, 4-D was contralled by a dominant single gene. Its seedlings had altered lateral root production, root gravitropism, and several root hairs, but no significant difference was observed between RM109 and the wild type in plant heigh, number of roots, and seminal root length. It was shown that the pericycle cell number in the root of RM109 mutant was 70% to 80% of that of the wild type, indicanting that the deficient lateral root production was mainly based on irregular cell division. No difference in number of amyloplasts was fonud between the two. However, the amyloplast size in the columella cells of RM109 root cap was 50% to 60% of the wild type. This result suggests root agravitropism of the mutant.View full abstractDownload PDF (3583K) -
Tomohiko YOSHIDA, TOTOK Agung Dwi Haryanto, Nguyen Duy CAN1999 Volume 68 Issue 2 Pages 253-256
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTwo cycles of recurrent selection were applied on a pearl millet (Pennisetum typhoideum Rich.) population sown in late summer. The procedure increased not only the selected characters, grain weight and panicle numbers, but also non-selected characters such as plant height, top weight, harvest index and panicle length. Heritability estimated by the genetic gain of S2 population was 0.47 for number of panicles per plant, 0.67 for pancile weight, 0.47 for grain weight per panicle and 0.90 for grain yield per plant, showing that the further selection for grain yield might be possible. Genetic correlation between grain yield and yield-related traits was high, showing the effectiveness of indirect selection through these yield-related for high grain yield.View full abstractDownload PDF (633K) -
Jun-ichi SAKAGAMI, Akihiro ISODA, Hiroshi NOJIMA, Yasuo TAKASAKI1999 Volume 68 Issue 2 Pages 257-265
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSTen cultivars of O. sativa (6 japonica, 2 indica, and 2 japonica×indika) and five cultivars of O. glaberrima were grown in pots. Half of each cultivar was cut at 10 cm above the ground at maturity, and the other half remained uncut. Both were grown under two different day-length conditions with a suitbable temperature. The growth state at maturity, the changes in the number of living tillers after maturity, and the survival rate after maturity were examined. The starch content in the stem (stem+leaf sheath) of O.sativa at maturity tended to be higher than that of O. glaberrima. The nodal root number and the total leaf length of the tiller bud from the node of a stem section at maturity were greater in O. sativa than in O. glaberrima. New tillers appeared in both O. sativa and O. glaberrima after maturity. The number of living tillers after maturity was always greater in O. sativa than in O. glaberrima, though the relation was reversed for some period in the long day uncut plot because of the appearance of new tillers from higher nodes. The long day and the uncut conditions enhanced the survival of tillers. In O. glaberrima, the survival rate of all cultivars at 250 days after muaturity was nil. In O. sativa, japonica cultivars were higher than indica cultivars, including japonica×indica cultivars in the survival rate at 250 days after maturity. All plants of some indica cultivars had died before 250 days after maturity. The long-day condition favored the survival rate. The continued appearance of new tillers in both O. sativa and O. glanberrima after maturity suggested that both O. sativa and O. glaberrima had potential perennial ability. It was inferred that the pernnial ability of O. glaberrima was very small compared with that O. sativa. It was also inferred that varietal differences in the survival rate existed in O. sativa.View full abstractDownload PDF (1252K) -
Michio KAWASAKI, Toshiaki MATSUDA, Youji NITTA1999 Volume 68 Issue 2 Pages 266-274
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe starch accumulation process and the ultrastructure of the plastid-amyloplast system in potato tuber were observed by electron and light microscopes. Amyloplasts were slightly flat ovalshaped and contained a single starch grain. Even if they were lrge, their replications were observed. In the parenchyma cells around the phloem, the plastid-amyloplast system intensively replicated and grew larger with starch accumulation. As a result, much starch was accumulated in the parenchyma cells in the tuber's internal cortex and perimedulla. Structures assumed to be involved in starch synthesis were observed in the stroma of plastids and the localized stroma of amyloplasts. The possible functions of these structures were discussed. We obsrved that parts of the tubular complex extended around the starch grain. It was considered that the complex played a role in efficient assimilate transportation for starch synthesis into the area forming a starch grain. Osmiophilic granules were originated from the tubular complex. It was observed that the granular material in the membrane-bound body was carried to near the starch grain. Therefore it was suggested that the branching enzyme reported to be eixsting in the membrane-bound body was supplied into the area synthesizing starch. The aggregating granules, which had been regarded as phytoferritin, were indentified as polysaccharide by the bismuth oxynitrate staining method in this study. This polysaccharide might function as temporary storage material for regulation of the starch synthesis and accumulation. The eccentric rings were observed in each starch grain under light microscopy. From our observations, we concluded that the amyloplast intensively synthesized starch in the localized stroma.View full abstractDownload PDF (6622K) -
Akira KURIYAMA, Katsumi WATANABE1999 Volume 68 Issue 2 Pages 275-277
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe effects of different kinds of amino acids on the viability of cryopreserved rice were examined. An application of glutamine or aspartic acid enhanced the viability, wheres glycine was deleterious to the cryopreserved cells. These results suggest that suitable amino acid is beneficial to obtain the higher survival rate in the cryopreservation of rice cells.View full abstractDownload PDF (475K) -
Tetsuji OYA, Ryuichi ISHII1999 Volume 68 Issue 2 Pages 278-282
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIt was reported that a supernodulating soybean mutant, En6500 derived from the variety of Enrei, could produce many root nodules, but the growth rate of the plant was not necessarily high. The purpose of this paper, therefore, is to examine the characteristics of nodulation and also of plant growth in En6500 for elucidation of the mechanism of its low growth rate. The relative growth rate was low in En6500 compared with Enrei. The dry weight of the nodules per unit root mass was greater in En6500 than in Enrei, suggesting that the root of En6500 is supporting too many or an excess of nodules, which presumably leads to a reduction of plant growth rate. Reduced growth rate was associated with low net assimilation rate and further with low leaf photosynthesis. Moreover, the reduced leaf photosynthesis was associated with low partitioning of nitrogen to the leaves in En6500. Much allocation of nitrogen to the plant organs besides the leaves resulted in low photosynthesis, and also in the reduced nitrogen-use efficiency for dry matter production, which might be a potential mechanism for the low growth rate of En6500, a supernodulating soybean mutant.View full abstractDownload PDF (794K) -
Naoko FUKUTA, Tomoyuki YUKAWA1999 Volume 68 Issue 2 Pages 283-288
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe relationship between nonstructural carbohydrate (NSC) concentration and snow tolerance of the broad bean was investigated. The growth and NSC of plants in early winter were changed by several sowing times and the use of three varieties (hardy, intermediate, susceptible) to clarify the relation with snow tolerance; furthermore, changes in NSC and injury caused by snow were examined. Although intermediate and susceptible varieties sown in early autumn almost died after 54 days under snow, a hardy variety sown in early autum showed high wintering ability. Plants sown in late autum, which gave a younger morphological state in early winter immediately after germination, showed high wintering ability and a high concentration of over 15% NSC in cotyledon. NSC in cotyledon of the hardy variety was not higher than that in the other two varieties, whereas NSC in foliage except cotyledon and the root of the hardy variety sown earlier was higher than those of two other varieties. From these results, it is suggested that the hardy variety accumulated high NSC in the plants, and that the intermediate and susceptible varieties showed high wintering ability when NSC in cotyledon was utilized for winter. Under the snow, NSC in leaf and stem decreased rapidly. The snow injury of intermediate and susceptible varieties increased rapidly after 36 days under snow, accompanying the decrease of NSC below 1% NSC in leaf and 2% NSC in stem. In contrast, the hardy variety showed no serious injury because of high NSC. The indication was introduced that more than a definite value of NSC in plants was important to maintain a tolerance of snow injury.View full abstractDownload PDF (977K) -
Naoko FUKUTA, Kazunobu TORIYAMA, Osamu MATSUMURA, Tomoyuki YUKAWA, Mas ...1999 Volume 68 Issue 2 Pages 289-295
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe content and distribution of potassium (K) and calcium (Ca) in the leaves of broad bean during the snow cover period were investigated to clarify the role of snow melt water in snow damage. The experiments were carried out under the conditions where air temperature was usually above 0°C and snow had been melting during the snow cover period. The melt water with an average pH of 4.4 contained CL-, SO42- and NO3-. The plants were cultivated in open fields or inside tunnels covered with non-woven fabric to decrease the quantity of melting water. Most of the plants in the open fields were damaged after 52 days of snow cover, but the plants inside the tunnel were hardly damaged. The K content in the leaves decreased under snow cover in both plots and the decrease in open field plots was greater than that in the tunnel plots. On the other hand, Ca content decreased only in the open field plots. The observations of leaves after snow melting with an Electron Prove Micro X-ray Analyzer revealed that the content of K in the necrotized part of the leaf was lower than that in the healthy part. From these results, we concluded that the minerals i leaves were leached out by continuous out by continuous snow melt water and the melt water is one of the factors enhancing the snow damage.View full abstractDownload PDF (2401K) -
Hideki OHDAN, Hiroyuki DAIMON1999 Volume 68 Issue 2 Pages 296-300
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSNitrogen-absorbing activity of Crotalaria juncea L. and Zea mays L. grown as a cleaning crop in nitrogen-accumulated soil was evaluated in an experiment conducted with 200 L-volume containers filled with volcanic ash soil using the 15N dilution technique. At 60 days after sowing, the dry weight and total nitrogen content of the tops in both plant species under an excess nitrogen condition (70 g N/m2) were significantly higher than those under a low nitrogen condition (3 g N/m2). Under the excess nitrogen condition, the dry weight and total nitrogen content in the tops of C. juncea were 28% and 55% of those in Z. mays, respectively. The proportion of the fixed nitrogen to total nitrogen was approximately 75% in C. juncea under the low nitrogen condition, whereas it was less than 1% and nodulation was negligible under the excess nitrogen condition. The amount of nitrogen absorbed by C. juncea under the excess nitrogen condition was approximately 35g/m2. The C-N ratio, which is one of the parameters of the decomposition rate of organic matter, was approximately 15 for the tops of C. juncea under the excess nitrogen condition. The results showed that C. juncea absorbed a large amount of nitrogen derived from soil and fertilizer under an excess nitrogen condition, and also suggested that yielded foliage would be useful as incorporating material.View full abstractDownload PDF (1148K) -
Yasuyuki WAKIYAMA, Tsunehisa INOUE, Nobuaki KOYAMA1999 Volume 68 Issue 2 Pages 301-305
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe production of grass in the Kyushu region was predicted by using Landsat TM data. Explanatory variables to be used for the multiple regression model for the prediction were determined by simple regression analysis. The degrees of correlation (r) between 2 vegetation indexes (RVI, NDVI), TM4 band, and the grass production ranged from 0.35 to 0.71. The grass production and mean air temperature were highly correlated during the growing period (r=0.83). The growth of grass from day of satellite observation to day of harvest was estimated on the basis of effective accumulated temperature (over 5°C) of this period. The multiple regression models were obtained in each year of 1989, 1990, 1992, and 1996 by using the TM4 band, the TM2 band, and effective accumulated temperature as explanatory variables. The coefficients of determination (r2) ranged from 0.64 to 0.72 in each model. The production of grass in the other years was then predicted based on these models, but the accuracy of the prediction was poor. This inaccuracy might be attributed to the above method of estimating grass growth from the day of satellite observation to the day of harvest and to an atomospheric effect on the TM data. These results suggested that the accuracy of prediction could be improved by using a crop growth model and atmospheric correction.View full abstractDownload PDF (737K) -
Akiko SATO, Miwako KOWATA, Shingo NAKAMURA, Mitsuru WATANABE1999 Volume 68 Issue 2 Pages 306-309
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe effect of harvest time on baking quality was investigated with wheat breeding line Tohku205. Grains harvested at 30, 36, 40, 45, and 51 days after anthesis had 46.2, 42.1, 29.4, 22.8 and 25.3% moisture content, respectively. Each grain was dried at 35°C with an air-dry oven until moisture content was 11%. The harvest at 30 days after anthesis had higher flour ash content and lower 1000-grain weight, milling score, sedimentation value, valorimeter value of farinogram, and extensibilty of extensogram, and the ratio of loaf volume to weight compared with the harvest at 40 days after anthesis. Valorimeter value of farinogram of the harvest at 36 days after anthesis decreased, compared with those at 40 days after anthesis. But no consistent change was seen in the other dough characterics and baking quality on the harvest at 36 days after anthesis compared with those at 40 days after. No consistent change was noted in dough and bakin quality of the harvest from 40 to 51 dyas after anthesis. It is concluded that the baking quality of the harvest at 30 days after anthesis was inferior to that at 40 days after, but almost no consistent change in baking quality of the harvest from 36 to 51 days after anthesis was evident.View full abstractDownload PDF (637K) -
Damage of Wheat and Barley in 1998 Harvest Year by Unusual Weather in Kyushu and Yamaguchi districtsHaruhiko YAMAMOTO, Kiyoshi IWAYA, Kenji SUZUKI, Yoshinori SUZUKI, Taka ...1999 Volume 68 Issue 2 Pages 310-315
Published: June 05, 1999
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn Kyushu and Yamaguchi districts of Japan, poor emergence of wheat and barley was caused by a long rain in November, 1997. The long rain and high temperature at the reproductive stage also caused wet' injury and scab (Gibberella zeae (Schweinitz) Petch. Therefore, the yield and quality of wheat and barley were decreased. The crop situation index of two-rowed barley in Kumamoto Prefecture was only 8, while that in each prefecture in northern Kyushu district was 50∼60. The survey for the agricultural union in Fukuoka Prefecture showed that the yield of two-rowed barley was 48%/10a, which was about 14% of that in a normal year.View full abstractDownload PDF (1221K)
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