摘要
论述了温室坡面效应(到达前坡面太阳辐射日总量与到达水平面太阳辐射日总量的相对增加率)的计算方法和变化规律.应用坡面效应理论,以冷凉时段的平均赤纬和其最大坡面效应的80%为基准,给出了确定最佳坡度的方法和依据.结果表明,在纬度(φ)为30～45°N的地区,最佳平均坡度(α_0)可由式(α_0)=30°+3/5((?)—30°)求得.论述了温室坡面效应(到达前坡面太阳辐射日总量与到达水平面太阳辐射日总量的相对增加率)的计算方法和变化规律.应用坡面效应理论,以冷凉时段的平均赤纬和其最大坡面效应的80%为基准,给出了确定最佳坡度的方法和依据.结果表明,在纬度(?)为30～45°N的地区,最佳平均坡度(α_0)可由式(α_0)=30°+3/5((?)-30°)求得.
The calculative method and the varying laws of the slope effect on greenhouse (relative increasing ratio of the daily total amount of solar radiation arriving the south slope to that arriving the horizontal plane) were described. According to the average declination from November to March and the 80 per cent of the maximum slope effect of the average declination, the method and the basis determining the optimum angle of the slope effect were given by the theory of the slope effect. As a result, the optimum average angle of the slope (a0)can be
calculated as a0=30°+3/5((?)-30°)at the range of (?) from 30°N to 45°N
出处
《华北农学报》
CSCD
北大核心
1995年第S1期190-195,共6页
Acta Agriculturae Boreali-Sinica
关键词
温室
坡面效应
坡度
赤纬
Greenhouse
Slope effect
Angle of slope
Declination
