以连续种植传统非转基因棉、转基因抗虫棉5 a和10 a的棉田为对象,研究了转基因抗虫棉对土壤养分和酶活性的影响。结果表明:与常规棉田相比,种植转基因抗虫棉土壤有机质、全氮、水解氮和有效磷含量没有显著差异,但增加了土壤速效钾含量;种植5 a转基因抗虫棉显著提高土壤脱氢酶活性,种植10 a转基因抗虫棉显著提高土壤过氧化氢酶活性;在转基因抗虫棉花大量采集期,土壤全氮和速效钾含量有所降低,而土壤pH、有机质含量有所升高。
Abstract
Effects of insectresistant transgenic cotton on soil nutrients and enzyme activities were studied after planting insectresistant transgenic cotton for 5 and 10 years. The results revealed that there were no significant differences for soil organic matter, total nitrogen, hydrolysable nitrogen and available phosphorus between soil planting with insectresistant transgenic cotton and that with nontransgenic cotton, but soil available potassium increased. Compared with soil planting with nontransgenic cotton, soil dehydrogenase activity significantly increased after 5 years,and soil catalase activity also significantly increased after 10 years planting with transgenic cotton. In the collection period of insectresistant transgenic cotton, soil total nitrogen and available potassium decreased, by contrast,soil pH and organic matter increased.
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基金
收稿日期:2010-05-25修回日期:2010-12-22基金项目:转基因生物新品种培育科技重大专项(2008ZX08012-005)作者简介:俞元春(1961—),教授,博士。*刘标(通信作者),研究员。Email: liub1@public1.ptt.js.cn。