转双价(Bt＋CpTI)棉种植对土壤速效养分和酶活性的影响  

Effects of Transgenic Bt + CpTI Cotton Planting on the Soil Available Nutrients and Enzyme Activities

作　　者：娜布其[1,2] 赵建宁[1] 李刚[1] 杨殿林[1] 红雨[2] 娜日苏[1,2] 刘玲[1,3] 

机构地区：[1]农业部环境保护科研监测所,农业部转基因生物生态环境安全监督检验测试中心(天津),中国农业科学院武清转基因生物农田生态系统影响野外科学观测试验站,天津300191 [2]内蒙古师范大学生命科学与技术学院,呼和浩特010022 [3]甘肃农业大学草业学院,兰州730070

出　　处：《农业环境科学学报》2011年第5期930-937,共8页Journal of Agro-Environment Science

基　　金：转基因生物新品种培育重大专项(2011ZX08012-005,2008ZX08012-004);中央级公益性科研院所基本科研业务费专项资金(农业部环境保护科研监测所)资助项目

摘　　要：本研究利用三室根箱对棉花根部土壤进行分区采集,以转双价棉SGK321及其亲本常规棉石远321为研究对象,对3个生长时期(播种后40、50 d和60 d)不同根区(S1、S2和S3)土壤速效养分(硝态氮、铵态氮和速效磷)含量及酶(脲酶、碱性磷酸酶和过氧化氢酶)活性变化进行了对比分析。研究结果表明,与常规棉相比,转双价棉的种植促进了S2根区土壤中磷素向有效态的转化,使S2和S3根区土壤硝态氮含量下降,而对各根区土壤脲酶、碱性磷酸酶和过氧化氢酶活性及土壤铵态氮无显著影响。主成分分析结果表明,土壤速效养分和酶活性变化主要受生长时期的影响,转双价棉种植对其影响是非常有限的。In this study,three-room rhizobox method was used to collect soil samples from different zones of cotton root.This experiment compared the effects of transgenic Bt ＋ CpTI cotton SGK321 and conventional cotton SHIYUAN321 on soil available nutrients（NH＋4-N,NO-3-N and available P） and enzyme activities（urease,alkaline phosphatase and catalase） at different zones（S1,S2,S3） in three growing stages（40 d,50 d and 60 d）.The results showed that,compared to the conventional cotton,planting transgenic Bt＋CpTI cotton improved soil P transforming to the available form in the S2 zone,while the content of NO-3-N decreased in the S2 zone and S3 zone.No significant differences were observed in soil activities of urease,alkaline phosphatase,catalase and NH＋4-N among three root zones.Principal component analysis showed that the changes of soil available nutrients and enzyme activities were mainly affected by the growth stages,the impact of transgenic Bt ＋ CpTI cotton on soil available nutrients and enzyme activities was very limited.

关 键 词：转双价棉 土壤酶活性 土壤养分 三室根箱 

分 类 号：S154.4[农业科学—土壤学]