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转Bt基因棉和转Bt+CpTI基因棉及相应非转基因棉的盆栽试验研究表明,转基因作物生长30天时可向土壤中释放Bt杀虫晶体蛋白,而双抗棉种植时CpTI杀虫晶体蛋白的释放量与作物品种有关;转基因棉种植对土壤过氧化氢酶、脱氢酶和硝酸还原酶的活性影响研究表明,生长30天时,与等价基因系非转基因棉相比,转Bt基因棉和双抗棉A的种植并未使三种酶活性发生显著变化,而双抗棉B的种植使土壤脱氢酶活性显著下降。从杀虫晶体蛋白的释放和对酶活性的影响来看,双抗棉B的种植对土壤的生物活性扰动更大。
Pot experiments of transgenic Bt + CpTI cotton and corresponding non-transgenic cotton showed that transgenic Bt insecticidal crystal protein could be released into the soil at 30 days of growth, while CpTI insecticidal crystal protein The effects of transgenic cotton planting on the activity of catalase, dehydrogenase and nitrate reductase in soil showed that when compared with the non-transgenic cotton with equivalent gene lines, Double cotton A cultivation did not make significant changes in the activity of three enzymes, cotton B double-resistant soil dehydrogenase activity decreased significantly. From the release of insecticidal crystal protein and its effect on the enzyme activity, the double cotton B disturbed the biological activity of the soil.