【作者】 徐晓海；

【导师】 余筱南； 易善贵；

【作者基本信息】 湖南农业大学 ， 种植， 2003， 硕士

【摘要】 本研究采用三元二次正交旋转回归设计，研究了氮肥、化控(缩节胺)、栽培密度三个主要栽培因子对抗虫杂交棉——南农98-4的单铃重、单位面积总铃数、衣分、纤维品质、皮棉产量等的影响，并建立了数学模型、模拟寻优，主要获得以下。结果： 1、在试验设计范围内，施尿素、喷缩节胺对单铃重的增加有明显的作用，在低密度条件下，增加密度有提高棉花单铃重的作用。增施氮肥、适当增加密度能有效地提高单位面积总铃数，但缩节胺用量应与之相应提高。 2、棉花的衣分、纤维品质基本保持稳定，与栽培措施关系不大。说明棉花衣分、纤维品质主要受棉花品种遗传特性控制。 3、模拟寻优皮棉产量最高组合是尿素65.23kg／667m~2、缩节胺3.0g／667m~2、密度1500株／667m~2，可产皮棉158.86kg／667m~2。 4、通过对南农98-4抗虫杂交棉主要栽培技术的应用研究，为安乡县及邻近地区指导大面积生产提供了科学依据。更多还原

【Abstract】 The effects were studied of nitrogen application rate , DPC regulating and planting density on the boll weight , unit area total bell count, lint percent, fiber quality and lint yield of Insect-Resistant hybrid cotton Nannong98-4 by three two hand in and rotate and design, we also founded the mathmatic model and the advanced analogy. The main results were as follows:1.Within the range of this experimental design, the nitrogen application rate , DPC regulating have an obvious effect to the increasing of the boll weight. Under the conditions of low plant density, the increasing of density also take effections on the boll weight. The increasing of nitrogen application rate & density will improve the unit area total bell count. But the application of DPC need to be increased at the same time.2. The stabitities of lint percent & fiber quality have not been effected by cultural factors . It improved that they are controlled by a kind special characteristic called heritage.3.The regression model between cultivation effects and lint yield was established. Through calculation,while nitrogen application rate 65. 23kg/667 m2, DPC application 3g/667m2 and planting density 1500plants/667 m2 respectively, the highest ginned cotton yield 158. 86kg/667m2 can be obtained.4.According to the research on the Insect-Resistant hybrid cotton Nannong98~4, it take an important role on the cotton production of large areas to Anxiang & other areas.更多还原