在控制水分条件下棉花高产优质生育与产量模型研究 Ⅰ.综合农艺措施的产量函数模型

STUDIES ON THE MODELS OF COMPREHENSIVEAGRONOMIC MEASURES FOR HIGH YIELD AND HIGH QUALITY COTTON Ⅰ. YIELD FUNCTION MODEL OF COMPREHENSIVE AGRONOMIC MEASURES

本文采用三因子回归最优设计的方法,研究了人工控制水分条件下棉花高产优质的施纯氮量、密度、灌溉定额等三项农艺措施间的关系,建立了总皮棉产量、霜前皮棉产量与三项主要农艺措施的函数模型;通过数学模拟筛选出了每公顷产皮棉1875公斤,霜前皮棉1650公斤以上的最佳农艺措施组合方案。

A comperehensive study was conducted on the lint yield, pre-frost lint yield of Zhongmi- an 12 (Gossypium hirsutum) influenced by prue N (X_1), planting density (X_2) and irrigation requirements (X_3) under controlled irrigation according to an optimum design of three factors by the Irrigation Research Institute, CAAS, in 1989. A regression model on the total lint yield, pre-frost lint yield has been established according to the experiment results. The opti- mum combination of agronomic measures was made by the mathmatical model. An analysis of the effects of factors shows that different application rate of pure N, planting density and amount of irrigation water result in different total lint yield and pre-forst lint yield. There are obvious interactions between pure N and planting density, between pure N and irrigation re- quirement, planting density and irrigation requirement.