夏棉氮肥化控效应模型及最佳配合应用的研究

A Study on Effect of Nitrogen and DPC on Short Cotton

采用空间因子均匀布点回归设计和计算机处理技术，研究了氮肥与化控配合应用对夏棉产量和霜前花率的影响，建立了以皮棉产量和霜前花率为目标性状的二元二次回归模型，进而求得高产优质氮肥、缩节胺综合取值最佳用量为纯氮１０．１４Ｋｇ／亩、缩节胺５．９ｇ／亩。降维分析表明，氮肥缩节胺均呈二次抛物线形，都有适宜的最高用量，过高过低，均非所宜。肥促化控应以肥为主，以控为辅，肥控结合，因肥施控，方可显示其协同效应。

Nitrogen and DPC effect lint yield and rate of good cotton with method of experiment of regression design have been studied Regression equation of lint yield and rate of good cotton is established. The decision-making project are suggested that pure nitrogen is applied 10.14Kg/mu,DPC 5. 9g/mu.