气候生态因素对棉花产量与纤维品质的影响

采用A. I. D.和积分回归等方法筛选出影响棉花产量与品质的若干气候生态模型。统计分析结果如下：1.利于棉花高产的气候生态模型：长江流域棉区为初夏晴朗、夏雨适中、秋季晴朗干燥；黄河流域棉区为初夏透墒雨、夏秋晴暖；在北部和西北部棉区，棉花产量随初夏和晚秋热量多寡而升降。2.棉花纤维强度随日平均气温和最低气温的上升而增强；成熟系数和细度受热量和日照时数影响；棉纤维长度受制于水分和热量条件。

EFFECTS OF CLIMATIC-ECOLOGIC FACTORS ON COTTON YIELD AND FIBRE QUALITY

The A.I.D. and integral regression methods were applied to screen out several models of climatic-ecologic factors which effect cotton yield and fibre quality.The statistical inference results are as follows:These models are liable to high yield, when early summer is sunny, summer is moderately rainy, autumn is sunny and rather arid, in the cotton region of the Yantse valley. When early summer is saturated by the rain and summer and autumn is sunny and warm in the cotton region of the Yellow River valley, the yield of cotton increases with the amount of heat in early summer and late autumn in North and Northwestern cotton regions.The higher the daily mean temperature and minimum temperature is, the stronger the single fibre strength would be. The heat and actual sunshine time influence the maturity and fineness of cotton fibre. The fibre length is influenced by water and heat conditions.