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本文通过对江苏沿海棉区 1995年以来转 Bt基因抗虫棉与抗虫杂交棉的品种、分布、表现和抗虫性等方面的特点和差异 ,指出以中棉 2 9为代表的抗虫杂交棉能集抗虫性和丰产性于一体 ,适于在本棉区种植 ,且颇受棉农的欢迎。文中还从生态经济学的角度进行综合分析 ,得出种植抗虫杂交棉有利于间套种 ,达到增效增益 ;能协调害虫和天敌的关系 ,使天敌数量增加 2 4.2 8%～ 148.2 1% ;可以减少治虫成本 1/2 ,减轻了环境的污染 ;抗虫杂交棉产量可比常规棉高 1～ 2成 ,利于增产增收 ;并且还能合理配置农村劳动力资源 ,促进二、三产业的发展等结论 ,同时 ,对本地区抗虫杂交棉利用的存在问题及对策进行了探讨 ,为领导决策提供科学依据
In this paper, the characteristics and differences of varieties, distribution, performance and insect resistance of Bt cotton and insect-resistant hybrid cotton from Jiangsu coastal cotton area since 1995 were analyzed. The hybrids represented by Zhongmian 29 Cotton can set insect resistance and high yield in one, suitable for planting in the cotton area, and quite popular cotton farmers. The article also from the perspective of ecological economics comprehensive analysis, concluded that the planting of insect-resistant hybrid cotton is conducive to interplanting, to synergistic gains; to coordinate the relationship between pests and natural enemies, so that the natural enemies increased by 2 4.2 8% ~ 148.2 1%; Can reduce the cost of pest control 1/2 and reduce the environmental pollution; the yield of insect-resistant hybrid cotton can be 1-2% higher than that of conventional cotton, which is good for increasing production and income; and also can reasonably allocate rural labor resources and promote the development of secondary and tertiary industries At the same time, the problems and countermeasures of using insect-resistant hybrid cotton in this area were discussed, which provided the scientific basis for decision making