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Yajirô SAKATO
1958 Volume 1958 Issue 11 Pages
1-8
Published: April 30, 1958
Released on J-STAGE: February 05, 2010
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Differentiation Stage and Habits
Tsuneji TAKAHASHI, Yoshimitsu YANASE
1958 Volume 1958 Issue 11 Pages
9-17
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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In this paper, the results of the studies on the differentiation stage and habits of flower development in the tea plant were reported. The variety Miyoshi, Yabukita and Yamato-midori were tested at the 1st flush, and Miyoshi at the 2nd, 3rd and 4th flushes.
1. The flower bud differentiation of the tea plant was observed during a long period from June to November.
2. Flower bud was observed at the growth stopped terminal bud, and at each axillary bud except the lowest leaf position on a substantial branch.
3. Each bud had three growing-points. The outer growing-point developed to flower bud and the inner one to axillary shoot. Whether these growing-points would develop to flower bud or not depended upon the internal and external conditions of the plant.
4. Differentiation stage appeared when the growing-point enlarged after the 3rd bract formation stage.
5. Differentiation stage of Miyoshi and Yabukita on the 1st flush was observed on June 18, and that of Yamatomidori on July 2. That of Miyoshi on the 2nd, 3rd and 4th flushes appeared on July 21, August 25 and October 17 respectively. Differentiation time varied with the sprouting time.
6. Flower development was more speedy on higher temperature. The 1st and 4th flushes needed longer time to differentiate flower bud than the 2nd and 3rd flushes needed.
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The Relation among the Weight and the Starch Content of the Stem and the Root Formation
Aogu NAKAYAMA, Shigeo HARADA
1958 Volume 1958 Issue 11 Pages
18-20
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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The relation between the starch content and the power to form root in tea stem cutting was investigated using 21 tea varie-ties.
There was no significant correlation between these two factors, but the correlation between the weight of cutted stem and the root weight was significant, and when the weight of tutted stem was equal, the starch content correlated with the root weight.
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The Effect on the Root Formation and the Root Development in the Tea Cuttings
Shigeo HARADA, Aogu NAKAYAMA
1958 Volume 1958 Issue 11 Pages
21-24
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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Cutted stems of Yabvkita variety were planted in air-tight pots and air currents having 5, 8, 14 and 20% of oxygen respectively were introduced separately through the soil in these pots.
The cuttings were drugged out after 24, 34 and 46 days and the formation and growth of the roots were examined.
The less the oxygen content, the poorer the formation and growth of the roots.
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Tests of the Acaricides and Other Organic Insecticides on the Tea Red Spider in the Laboratory
Masaru OSAKABE
1958 Volume 1958 Issue 11 Pages
25-31
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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In this paper, the results of the tests of some acaricides and other organic insecticides for controlling the tea red spider (Tetranychus kaneawai KISHIDA = T. japonicvs HOTTA), one of the most commonest pest of the tea plant in Japan, were described.
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Jinhaku MINAMIKAMA, Yukihiro KUBOTA, Masayoshi YOSHIDA
1958 Volume 1958 Issue 11 Pages
32-41
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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The life-history and the habit of the mulberry scale were studied. This species has come to inflict severe damage on the tea plant after the II War. It is polyphagous, attacking tea, mulberry, peach, pear, plum, kaki, cherry and other 22 species of plants.
Normally 3 generations were repeated in a year, sometimes 4 generations observed in the laboratory. The female overwintered in adult and laid eggs in May. One female laid 50-100 eggs. 174 in maximum. The eggs in respective generations hatched out in May, July, and September-October, after 1-2-weeks' incubation. It took about for 5-6 weeks in one generation.
The hatching happened in eaeh plucking season, this coincidence made the distribution of the nymphs wider.
The mass production of this insect was tested with potato and squash, better results were obtained with squash than potato.
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Harukichi SUGIYAMA, Hiroshi SAITO, Fumio OKADA, Gengoro IWAHORI
1958 Volume 1958 Issue 11 Pages
42-44
Published: April 30, 1958
Released on J-STAGE: December 03, 2009
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The condition of exhaust air from a working rough rolling machine was investigated with an electric resistance thermometer and an electric vapor pressure gauge and with the object of discharging the leaves at a definite level of water loss, some experiments regarding to a uniform operation of the machine were performed.
On an equal feeding of tea leaves and supplying of heat to the machine, the vapor pressure in the machine reached the-maximum after 8-12min. from the start, then fell gradually, and finally at the finish of working nearly dry air was exhausted.
With the aid of vapor pressure-water loss diagram drawn by these meters, uniform discharging of tea leaves could be gained.
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Toshio HARA, Etsuro KUBOTA, Saneyuki KAYUMI
1958 Volume 1958 Issue 11 Pages
45-49
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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In order to determine the grain-size of tea, the sieve analysis of tea was examined with J. I. S. standard sieves. The test sieves used had openings of 500-5, 660μ in √2 magnifi-cation series. On measuring the grain-size distribution of tea, 50g. of tea were sieved for 5min. with Ro-Tap shaker, and the residue on each sieve was weighed.
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On the Optimum Feed Rate of Tea for Polishing Machine
Asataro MOTOSUGI, Toshio HARA, Akimitsu MOTOMURA
1958 Volume 1958 Issue 11 Pages
50-52
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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Hiroshi KATÔ, Atushi KUBOTA
1958 Volume 1958 Issue 11 Pages
53-56
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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1. Two types of through-flow dryer for drying green tea were designed.
2. Both machines could reduce the water content of the tea leaves to 4-5%(on dry base) from the initial level of 13-15%, and produce 35 kg. of dried product per hr. The air temperature applied was 70°C, and air velocity 0.5 meter per second.
3. Continuous dryer and batch dryer are shown in Figs.3 and 5 respectively.
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Satoshi FURUHATA, Miyoko KOIKE
1958 Volume 1958 Issue 11 Pages
57-59
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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Considering the imported tea standards in Chile, Canada, and Egypt, the ash content of black tea for export was investigated.
There were a few samples of "Dust" exceeded the prohibiting limit for trade, but "B. O. P." and "Fanning" were almost within the limit.
There existed a high correlation between crude ash and hot water-insoluble or acid-insoluble ash, so the latter two could be estimated from the crude ash content.
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Hideichi TORII, Isao ÔTA
1958 Volume 1958 Issue 11 Pages
59-68
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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It was an well-known fact that the ordinary tea leaves contained about 5% of nitrogen in spring and about 3% in summer, but the reason why the depression of the nitrogen content occurred during these seasons has not yet been confirmed.
With the purpose of solving this problem, some experiments were performed from 1952 to 1954, by comparing summer crops one of which harvested with regular plucking, the others had not been plucked or checked the flushing with MH-30 spraying in the preceeding season.
In these experiments, the yield and nitrogen content of the regularly plucked tea bush decreased in the order of 1st, 2nd, and 3rd season, and tannin content varied in the reverse direction as many chemical analyses had shown previously.
The bush unplucked in the preceeding season produced lower yield and the crop was poorer in nitrogen content and higher in tannin than the control. But, as the total amount of the chemical component harvested in the crop depended upon the yield, both nitrogen and tannin deprived were larger in the control.
The bush which was checked its flushing by MH spraying in spring could not produce so rich leaves in nitrogen in summer as the control bush had produced in spring.
The chemical analyses of mature leaves also showed the fact that the nitrogen did not seemed to be reserved in the leaves during the season when the flushing had been checked.
As the results of 3-year's experiments, any proof for explaining the reason why the summer crop had lower nitrogen content was not obtained from the point of view of nitrogen absorbing. period from the tea root.
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Basic Constituents of Water Extracts of Dried Tea Leaves
Yajiro SAKATO, Takashi IGA
1958 Volume 1958 Issue 11 Pages
69-72
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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Sôgo KAWAI, Kôzô ISHIGAKI, Hiroji TAKAYANAGI
1958 Volume 1958 Issue 11 Pages
73-78
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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Manurial effect of magnesium and interrelation among potassium, phosphorus, calcium, and magnesium absorption on the tea plant were investigated by pot culture tests with black soil. . The results were summarized as follows:
It was observed that magnesium was very effective on the growth of the tea plant, and potassium content of the tea plant was decreased by supplying magnesium, while magnesium content was decreased by the double supply of potassium, but was not influenced by the double supply of calcium. The ratio of MgO/K
2O of tea plant ash and soil in magnesium supplying plot was higher than that of the other plots.
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Sôgo KAWAI, Kôzô ISHIGAKI, Noboru MORITA, Kenjiro IK ...
1958 Volume 1958 Issue 11 Pages
79-92
Published: April 30, 1958
Released on J-STAGE: July 31, 2009
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The tea soils of Ichinomiya, Mori-machi, Shûchi-gun, Shizuoka-prefecture were surveyed and the physical and chemical characteristics. of these soils were investigated.
According to the results, suitable methods for improving the tea gardens of this district were suggested.
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M.A. BOKUCHAVA
1958 Volume 1958 Issue 11 Pages
93-96
Published: April 30, 1958
Released on J-STAGE: December 03, 2009
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K.M. DZHEMUKHADZE
1958 Volume 1958 Issue 11 Pages
97-108
Published: April 30, 1958
Released on J-STAGE: December 03, 2009
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1958 Volume 1958 Issue 11 Pages
109
Published: April 30, 1958
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1958 Volume 1958 Issue 11 Pages
110-114
Published: April 30, 1958
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1958 Volume 1958 Issue 11 Pages
e1f
Published: 1958
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1958 Volume 1958 Issue 11 Pages
e1g
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1958 Volume 1958 Issue 11 Pages
e1h
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1958 Volume 1958 Issue 11 Pages
e1a
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1958 Volume 1958 Issue 11 Pages
e1b
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1958 Volume 1958 Issue 11 Pages
e1c
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1958 Volume 1958 Issue 11 Pages
e1d
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1958 Volume 1958 Issue 11 Pages
e1e
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