【摘要】 作者通过1977～1981年和1987～1989年,分别在绥化、哈尔滨和合江地区的田间试验和生产调查,发现大豆叶面积指数的大小可造成不同的田间微气象环境条件,叶面积指数6左右时,植株似倒非倒,株间采光量和CO₂分布较为合理,光合效率高,大豆单株生育良好,群体产量高;在生产上可依据当地土地条件、施肥水平、不同品种和不同种植方式用叶面积动态变化方程式计算出适宜的密度,以使大豆群体最大叶面积指数保持在6左右,创造较理想的田间微气象效应。更多还原

【Abstract】 By means of field experiment and comprehensive investigation in Sui Hua, Harbin and He Jiang region reepectively in 1977- 1981 and 1987-1989 it has been found that the changes of LAI of soybean populations could cause different field micrometerological environment. When LAI was around 6 and plant inclined slightiy, the sun light and CO2 distribution among plants were most reasonable, photosynthetic rate of the population was higher, grouth and development of individual plant was better and yield was higher. In production practice, the optimum density can be calculated by the equation of LAI dynamic changes according to soil conditions, fertility level, cultivars and cultivation patterns in order to get maximum LAI of soybean populations around 6 and create a rational effect of field micrometerology.更多还原