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Volume 1973, Issue 39
Displaying 1-7 of 7 articles from this issue
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Yoshio KUWABARA1973 Volume 1973 Issue 39 Pages 1-7
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
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Hisao SAKATA, Shinichiro NAKAMURA, Isao KOYA1973 Volume 1973 Issue 39 Pages 8-13
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSExperiments on utilization of the paper pots in planting the tea cuttings were carried out to reduce the transplant damages. Being planted in the paper pots, the cuttings rooted well and developed into good saplings to reduce the transplant damages. Transplanting the saplings in the tea field, it was better to plant the paper pots with them. Planting the cuttings in summer and transplanting them in the next spring, it was better to use 10 cm paper pots (in diameter).
The cuttings planted in the paper pots in summer could be transplanted in autumn, and also those planted in autumn could be trans-planted in the next spring, the latter being practical and it being good to use 7.5 cm paper pot in this case.
Using 10 cm paper pots in summer, two, two or three, and three cuttings with four, three, and two leaves respectively could be planted in a paper pot, and they developed into good saplings and good plants after transplanting. Planting the cuttings in 10 cm paper. pots, soil mixed CDU (70 g/m2) was better .used to develop them well. From the above experiments it was found that the period in the cutting nursery was shortened using the paper pots.View full abstractDownload PDF (358K) -
Osamu SHIREI, Minoru IMANISHI, Seisuke TAMAOKA, Katsuji YOSHIDA1973 Volume 1973 Issue 39 Pages 14-19
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIt has been recognized in. many experiments that the grass mulch has remarkable effects on the tea field. But optimum quantity of grass for mulch has not been yet well known.
This experiment was carried out to determine the optimum quantity of the grass mulch for the tea field.
The results obtained are as follows;
1.In the mulchless tea field on slope, the growth of shoot, the yield of green leaf and the quality of green tea were inferior to those in the mulch field. This was thought to be mainly induced by deterioration of micro climate and run-off of fertilizer.
2.The optimum quantity of grass mulch will be fluctuated by the kinds of grass and tea soil, but in this experiment, it was determined to be 10 ton fresh grass per hectare. The growth of shoot, the yield of green leaf and the quality of green tea were good at this quantity. Therefore the grass mulch was thought to be suitable for management of the tea field.View full abstractDownload PDF (298K) -
Akinori EZUKA, Kyuzo KASAI, Hideo KIBUSHI1973 Volume 1973 Issue 39 Pages 20-22
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSA leaf rotting disease of tea plant new to Japan was found at five locations in Shizuoka Prefecture in August and September, 1956. Necrotic lesions of dark brown colour appeared on young leaves, often covered the whole surface of the leaves and let them fall off. Abundant hyphae of the causal fungus were found inside and outside of the attacked leaf tissue.
Fructification of the fungus was formed on the surface of the neighbouring healthy stems or leaves as a thin, whitish membrane with powdery appearance. Hyphae there usually branched crosswise and typical cross-shaped cells were observed. Basidia scattered, not forming a continuous layer. Basidiospores were hyaline, one-celled, ovate to elliptical with a rostrum at the base, sized 7.0-12.0×4.0-7.5μ (9.6×5.6μ on the average). Sclerotia were not found anywhere on the diseased plants. From thsse observations the fungus was identified as a species belonging to the genus Pellicularia (Corticium, according to the old taxonomic system), though the species name has not been exactly determined yet.
The symptom of the disease was very much similar to that of the black rot known to be prevalent in India and Sri Lanka, and the causal fungus was also of the same genus as the causal fungi of black rot. The authors, therefore, considered this disease to be the same kind as the black rot in South Asia, and named it "kurohagusare-byo" in Japanese, meaning black leaf-rotting disease.View full abstractDownload PDF (4841K) -
Ichizo ONISHI, Takako MORIMOTO, Yoshiyasu TOGASHI1973 Volume 1973 Issue 39 Pages 23-28
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
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Etsuro KUBOTA, Shuichi FUKATSU, Toshio HARA1973 Volume 1973 Issue 39 Pages 29-30
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
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[in Japanese]1973 Volume 1973 Issue 39 Pages 31-34
Published: June 26, 1973
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSDownload PDF (248K)
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