Table of Content

10 October 1992, Volume 13 Issue 05

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TO GENERATE CLIMATE SCENARIOS IN CHINA WITH DOUBLED CO_2 BY USING GCMs OUTPUTS AND HISTORIC WEATHER DATA

Jin Ziqing Chen Hua Ge Daokuo Fang Juan Zhen Xilian (Jiangsu Academy of Agricultural Sciences)

1992, 13(05):  13-21. 

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In this paper, the outputs of 3 general circulation models (i. e., GISS, OFDL and UKMO) were employes as a basis on computer for constructing the regional climate scenarios with doubled CO_2 concentrations in China, combined with 20-30 years historic weather data, By which, the aurthors disccussed the distributional features and seasonal changes of temperature, precipitation and solar radiation under doubled CO_2 scenarios and also estimated the vulnerable regions of global climate change in China. The results could provide necessary information for assessing the implication of climate change in China.

SOIL HEAT PROPERTIES IN PLASTIC GREENHOUSE

Chu Changshu Zhu Jun (Nanjing Institute of Meteorology)

1992, 13(05):  33-37. 

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In the article, on the basis of the data of soil timperature measured inside and outside of the plastic greenhouse, calculations were made inside and outside the greenhouse, about the daily change of average vertical soil heat fluxes, the sums of positive, negative and whole day soil heat fluxes as well as the daily change of average soil temperatures. In addition, the daily change of average horizontal and vertical gradients of soil temperature in the greenhouse were calculated. And comparision was made about the differences of the daily change between the closed and opened greenhouses.

STUDIES ON POTENTIAL RESOURCES OF RICE LIGHT AND HEAT IN NINGXIA

He Zhongkang(Ningxia Agrotcchnical station)Su Huanlan(Ningxia Agricultural College)

1992, 13(05):  40548-405. 

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The daily mean temperature of sowing can be reduced to 4℃from>10℃covered with plastic film in Ningxia. It means that sowing date may be moved up from Apr. 15-25th. to Mar. 21th-Apr. 5th. The average yield can be increased from 500 kg/mu to 600kg/mu. May get 800 kg/mu with advanced farming technigues. The rate of solar energy utilization can be raised from 1.9% to over 2% in 1980s.