【摘要】 本文试图把太阳辐射,温度和降水等基本要素统一起来对农作物潜在产量进行分析,阐明气候生产潜力在黄土高原的地理分布特征。太阳辐射及温度的生产潜力用下式计算: G_y=Q_g(1-α)P_t(1-R)(γβσ)/C水分条件对产量的影响用干燥度表示,当干燥度小于1时,产量不受水分限制;当干燥度大于1时,其量随干燥度增加而线性减少(正文表1)。根据生产潜力的大小,笔者对农业与牧业的界线进行了讨论,这比习惯上用降水量确定其界线的依据更充分。更多还原

【Abstract】 For crop yield, climate is one of the most important environmental factors, of which solar radiaton, temperature, and precipitation are the fundamental ones. In this paper, the auther has attempted to examine the combined effects and try to derive the method of computation. The caculation equatin of potential productivity by temperature and sunshine is given as following. G_y=Q_g(1-a)P_t(1-R)(γβσ)/c Where G_y is the potential productivity by temperature and sunshine; P_t is the relative rate of photosynthesi s, which equals the ratio of the photosynthesis rate at temperature t to the same rate, the most suitable temperature, Q_g is the physiological radiation, γ is the plant intercepting rate against photo-energy, σ is conversion efficiency of quantum, c is the mean capability of heat production of dry matter, β is the coefficient of economical yield.The aridity D =∑E_T∑r, where ∑E_T is the total evaporated amount and ∑r is total rainfull in the same period, is well correlated with the crop yield, The relative potential productivity by moisture is given in tablel.the geographical distribution of the climatic potential productivity is divided based on the above methods in loess plateau.更多还原