Loading...

Table of Content

    10 June 1992, Volume 13 Issue 03
    论文
    Air Temperature and Humidity in a Plastic Greenhouse as Well as the Effect of Ventilation
    Chu Changshu Zhu Jun(Nanjing Institute of Meteorology)
    1992, 13(03):  32-35. 
    Asbtract ( 8057 )  
    Related Articles | Metrics
    Based on the data of air temperature and humidity obtained from inside and outside of plastic greenhouse as well as of wind on the opening of the greenhouse, some properties were found of the time and space distribution of air temperature and humidity, especially, the inequality of the temperature-preserving and humidity-preserving effects in the closed greenhouse except a certain time before noon when both effects are equal. In addition, a general relationship was discovered between the quantity of ventilation on the opening of the greenhouse and the temperature and humidity differences between inside and outside of the greenhouse.
    EFFECT OF LEAF TEMPERATURE ON GRAIN MILKING OF WINTER WHEAT
    Liu Ruiwen Dong Zhenguo(Beijing Agro-ecosystems Experimental Station Chinese Academy of Sciences, Beijing)
    1992, 13(03):  40548-405. 
    Asbtract ( 7074 )  
    Related Articles | Metrics
    Result of field study showed that grain milking process of winter wheat could be described by the difference between leaf temperature and air temperature. When atmospheric vadiation was high and water supply was sufficient for plant grouth, the difference between leaf temperature and air temperature was relatively high and LAI decreased smoothly and the environment could be fit grain milking. When the radiation was high but plant suffer from water stress, the temperature difference was less and LAI decreased markedly, and the environment was unsuitable to grain milking. when the radiation was low, air temperature and the temperature difference were low, the environment was also unsuitable to grain milking. The paper present a mathematical model which can be used to guide crop production.