降水的季节分布对春小麦产量的影响

采用二次正交旋转组合设计方法，研究了降水的季节分布对春小麦产量的影响，建立了数学模型；分析了因素的主次，６月降水对小麦产量影响最大；提出了丰产的降水分布为４月２３．８～３２．３ｍｍ，５月５０．６～５８．７ｍｍ，６月９４．７～１０３ｍｍ，７月１６１．２～１７２．８ｍｍ；分析了边际产量效应，各月均是在干旱时灌水边际产量效应高，超过适宜水分后为负效应。为合理利用气候资源和节水灌既提供科学依据。模型也可用于省内地区降水对小麦产量影响的测报

EFFECT OF THE SEASONAL DISTRIBUTION OF PRECIPITATION ON THE YIELD OF SPRING WHEAT

Using the method of quadratic rotary combination design, this papprressarched the effect of the seasonal distribution of precipitation on the yield of spring wheat, and established the mathematical model The precipitation distribution to high yield was put forward: April 23 80～32 20 mm,May 50 60～58 70 mm, June 94 70～103 00 mm, July: 161 20～172 80 mm The effect of marginal yield was analysed Just under drought condition, when unit water (1 mm) was irrigated the yield effects of every month were high When it exceeded the suitable water, the effects were negative These provide scientific basis for putting dimatic resources to rational use and irrigating economically This model may also be used for the forecast of the effect of the regional drought or water logging disasters on the yield of wheat in the province