黑龙港棉花类型区棉(棉花)椒(天鹰椒)间作施肥的经济效益及水分利用率研究

研究以单作棉田为对照，重点探讨了棉椒间作施肥的经济效益和水分利用率。结果表明，棉椒问作既维持了较高的棉花产量水平又显著提高了棉田的经济效益和水分利用率，且对该区现有可支撑水资源有明显适应性；施肥主要是通过增加棉田经济效益进一步提高了间作棉田的水分利用率，而棉田经济效益的增加又主要靠天鹰椒产量的提高来实现，750．0kg／hm^2K2SO4复合肥即可实现稳定较高的棉田经济效益和水分利用率；棉椒间作把化学（地膜）覆盖和生物（天鹰椒）覆盖融为一体，较充分地利用了农田覆盖的作用。

Economic Profits and Water Use Efficiency of Cotton Field Under Cotton- cluster Redpepper Intercropping and Fertilizer- application in Cotton- specialized Zone of Heilonggang

According to the main problems existing in Heilonggang cotton-specialized zone,a core model for compound,effective and industrial development was established,that is,the cotton-cluster redpepper intercropping model.Compared to the single cotton model,this study mainly approached the economic profits and water use efficiency of fertilizer-application in the intercropping cotton field.The results showed that this model not only maintained the high cotton yield but also remarkably improved the cotton field's economic profits and water use efficiency.And at the same time,it showed the great adaptability to the present water resources of this cotton-zone.On one hand,through increasing the cotton field's economic profits,fertilizer-application greatly improved its water use efficiency.On the other hand,the increase of the economic profits depended on the improvement of the yield of cluster redpepper.750.0 kg/hm~2 of K_2SO_4 compound fertilizer could help to realize the high economic profits and water use efficiency of cotton field.Combined with the plastic film mulch,this kind of model made the full use of the effect of farmland mulch.