Table of Content

10 September 1987, Volume 08 Issue 03

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AN ANALYSIS FOR THE EFFECT OF INCREASING PEANUT FIELD AND TEMPERATURE COVERED WITH PLASTIC FILM IN THE PLATEAU REGION OF CENTRAL YUNNAN

Zhang Keying Ma weijun Wen Huayi Zhang Yi ping Liu Yuhong

1987, 08(03):  40548-405. 

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The experiment in the planting peanut covered with plastic film comparing with that no the film in the plateau region of central yunnan indicated that the Peanut field of covering with the film (A) and with both the ashes and the film (B) increased by 124% and 145%,respectively, and the field in the area B increased by about 10% more than that in the area A.This Paper also discussed the effect of increasing temperature of upper soil covered with the film,the relationship between the peanut field and the climate in Yunnan province, and the problems which should be paid attention to when the technique is popularized and applied in the south, central and north parts of Yunnan.

The Technical Index of Seedling Bed Management In The Open-Close Methods of The Drought Raising of Rice Seedling

Wu Wenjun Hua Zetian (Yingkou Institute of Agri.Meteo.Liaoning Province)

1987, 08(03):  40703-407. 

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The paper confirms the sowing time, rate and ecological standards of seedling and the index of management and control of temperature and sunlight practically in the various methods of open—close ways of drought raising of rice seedling, through many years' field text, and combining with practical experience, according to the cultural methods of transplanting used in the northen rice regions of our country.The critical walue of relative sunlight intensity was 15% within the rice seedling colony, and the index of leaf area was about 10.The accumulated temperature that the seedling needed from sowing to various seedling age was: before 3-6 leaves, 100-130 degree-day; within 6-10 leaves increased to 270 degree-day perleaf.When the leaf area index gained to some a given limited value, the sowing rate increased, the accumulated temperature decreased and seedling period reduced,reversly made the seedling period lenthen.The sowing rate of big seedling transplanted by hand was 150-200g/m~2, the seedling age of it 5-6 leaves,the dry weight of every seedling was 150-160mg, and the accumulated temperature 600-700 degreeday.But for the middle seedling transplanted by machine, the sowing rate was 500-600g /m~2, seedling age 3.0-3.5 leaves, the dry weight of every seedling 55-60mg, and the accumulated temperature 250-350 degree-day.For the seedling of late transplanting, the sowing rate was 50-75g/m~2, seedling age 8-9 leaves and dry weight of every seedling 500-600mg,the accumulated temperature 800-900 degree-day.