【摘要】 对河北省6个县245个农户两年的问卷调查材料为依据,对种植转Bt基因抗虫棉和非抗虫棉品种的效果以及不同基因来源、不同代数的转Bt基因抗虫棉品种的成本和收益进行了分析比较。结果表明,在调查所涉及的2002和2003年度,转Bt基因抗虫棉品种的产量、农药成本、总成本和收益都比非抗虫棉品种高。转Bt基因抗虫棉1代种子比转Bt基因抗虫棉2代和3代种子产量高,但是两者收益之间的差异在两个年度有不同的趋势。更多还原

【Abstract】 Based on a survey involving 245 small cotton farming households from 6 counties in Hebei province,effects of using Bt cotton and non-Bt cotton varieties was analyzed. Costs and profits of using different Bt cotton varieties with different gene sources and those of using different filial generations of seeds were also compared. The results showed that in the years of 2002 and 2003,yields and profits were increased with the application of Bt cotton varieties despite of the increase in costs of pesticides, seeds and in overall costs. Yields with F1 seeds of Bt cotton varieties were higher than those with F2 and F3 seeds, while there was a variance in the differences of profits between using various filial generations of seeds between the two years.更多还原