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Table of Content

    10 December 1998, Volume 19 Issue 06
    论文
    The Versatils Soil Moisture Budget Model and Its Tentative Application in China
    Wang Xiping Yao shuran (Hebei Meteorological Institute, Shijiazhuang 050021)
    1998, 19(06):  . 
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    VSMB (Versatile Soil Moisture Balance Model) is a soil moisture monitoring model originated in late 1960s in Canada. Using daily weather data, considering the distribution of the water abstracting ability of root systems and soil water holding characteristics whthin soil profile, VSBM model calculates the daily soil moisture and other soil water balance elements such as evapotranspiration, infiltration ect. This paper introduced the physical work chart of this model and listed a little samples of utilization of the model to China. The VSMB model is relatively simple and understandable. The model works by submodels combined together and is relatively easy to be improved or corrected to a new location. It is a good submental model to use for Chinese water saving agriculture.
    Research on Environmental Quality of Green Food Tea in Guizhou
    Zhou Ying 1 Hu Maogong 1 Zhao Weiwu 2 Zhang Jie 2 Zhang Tianyuan 1 Wu Junming 1 (1 Guizhou Insititute of Meteorology, Guiyang 550002, 2 Guizhou Agriculture Department, Guiyang)
    1998, 19(06):  . 
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    The individual pollution index and the composite pollution index were used to research the environmental quality of the plantations. It was concluded that 93.3 percent of the atmosphere environment and 40 percent of the soil quality of these tea plantations are good for development of Green food tea. In 60 percent of tea plantations polluted by soil pollutants, if effective measures are adopted and the use of DDT is prohibited, there are at least 20 to 30 percent of tea plantations where the soil quality can be reached to clean level.
    Experimental Study on Frost Damage to Chinese Cabbage in Field in Lhasa
    Lin Rinuan Zhang Yong (Lhasa Meteorological Bureau, Lhasa 850000)
    1998, 19(06):  . 
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    In this paper, based on the experimental results, a series of frost damage index to Chinese cabbage in the plateau field are established and a simulating equation for minimum temperature is proposed. According to the climatic regularity and principle of frost, some measures to prevent frost damage are proposed.
    Effect of Mulching Straw in Summer sowing Maize Field on Water Saving and Temperature Adjusting
    Bai Zhenjie (Gongyi Meteorological bureau, Henan Province,Gongyi 451200) Zhang Congzhi Yang Guangxian Bai yuZhou Xingfu(Zhengzhou Meteorological Bureau)(Gongyi Meteorological Bureau)
    1998, 19(06):  . 
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    The optimal sowing period and the growth of summer maize are often affected by the high temperature and less rainfall in the early Summer. Our experiments show that obvious effect of water saving, moisture preserving in the soil and temperature adjusting in summer sowing maize field was obtained and the disadvantageous influences of meteorological conditions in early summer were reduced by covering with wheat straw. It is a technique of water saving and high yield as the raw materials can be obtained locally, need less investments, work quickly and achive many things at one stroke. This technique is good for popularizing in the middle/northern Henan Province and the Northern China.
    Analysis and Calculation on Law of Transpiration Rate of Wheat
    Wan Changjian Zheng Youfei Zhang Jianjun (Nanjing Institute of Meteorology, Nanjing 210044)
    1998, 19(06):  . 
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    Depending on the data measured in field, the time and spatial variation law of wheat transpiration was analysed. It was shown from results that the main meteorological factor affecting wheat transpiration are temperature, light intensity and relative humidity. Based on the analysis, it is set up a simple model that wheat transpiration can be calculated by meteorological data.
    The Effect of Illumination on Intercropping of Poplar with Crops
    Jia Yubin Pei Baohua Wang Deyi Yuan Yuxin Wang Wenquan (Forestry school, Hebei Agricultural University, Baoding 071000)Zhang ZhenjiangZhao Huimin(Hebei Daming County Forestry Bureau)(Dingzhou City Forestry Bureau)
    1998, 19(06):  . 
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    The insufficiency of sunshine caused by the poplar crown’s shady in intercropped fields is an important factor affecting the growth and yield of crops, and also a key problem that needs to be considered when choosing and designing the rational model of intercropping and thinning. Based on a great deal of investigation data of the microclimate in different model testing areas of intercropping of poplar with crops by manual and automatic meteorological instruments for many years, this paper analyzed the character of time and place distribution of sunshine and the yields distribution of crop in different models of intercropping of poplar with crops. It was suggested that if eight hours sunshine guaranteed in the middle of rows in a day the spacing between rows of poplar should be 28m when they are 5 year old, 56m when 10 year old. The spacing can be 14m or 7m when the poplars are planted at the beginning for fully utilize abundant light energy and land resources.