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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. 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。 According to the growing characteristies of cotton and the clinate features in Hunan,the authors advance the new techniques for high yield of cotton of improving photosynthesis and increasing fertilizer.In addition to intensive cultivation in time of flowering and fruiting,more attention should be apid to seedling stage and flowers and young bolls be controlled by using chemicals. 在总结湖南棉花生产经验的基础上,根据棉花的生育特性和湖南的气候特点,提出了“稳住中间,搞活两头,以争光增肥为中心”的棉花高产栽培的技术路线,论述了贯彻这一技术路线必须采用争光、增肥、肥促化控和狠抓秋桃等技术措施 This experiment based on the design of 5-element quadratic revolving regression is to make the mathematical patterns. Statistical analysis expressed that gaining bolls per ha and boll meight is main direction of higher yield. Change rule of yield factors and yield structure index of different lint yield have been searched. Must pay attention to best boll in 1 ̄2 fruiting node of medium and lower fruiting branches. Using complex agricultural measures (adapation early transplant, reasonable close transplant, fertilizer... This experiment based on the design of 5-element quadratic revolving regression is to make the mathematical patterns. Statistical analysis expressed that gaining bolls per ha and boll meight is main direction of higher yield. Change rule of yield factors and yield structure index of different lint yield have been searched. Must pay attention to best boll in 1 ̄2 fruiting node of medium and lower fruiting branches. Using complex agricultural measures (adapation early transplant, reasonable close transplant, fertilizer promotion and chemical contronl) is key establishing best yield structure (better quality and higher yield). 采用五元二次旋转回归设计田间试验,通过建立各类数学模型的统计分析得出,力争公顷铃数、兼顾铃重,是获得高产的主攻方向。摸清了各产量因素间相互制约、此长彼消的变化规律与不同皮棉产量的产量结构指标。明确狠抓中下部果枝1~2果节内围优质铃、运用适期早栽、合理密植、肥促化控等综合农艺措施,是实现优质高产最佳产量结构的症结
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