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棉花学报  2015 

转基因(Bn-csRRM2)高产棉花对土壤速效养分和酶活性的影响

DOI: 10.11963/issn.1002-7807.201502007, PP. 143-148

Keywords: 转基因,棉花,速效养分,土壤酶活性,高产

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Abstract:

在田间试验条件下,以转基因(Bn-csRRM2)高产棉及其亲本常规棉中棉所12为研究对象,比较分析2种棉花在不同生育期(苗期、蕾期、花铃期和吐絮期)对土壤速效养分和酶活性的影响。结果表明,随生育期推进,转基因高产棉土壤铵态氮和硝态氮含量变化趋势与常规棉一致,土壤速效磷含量变化趋势与常规棉不同。转基因高产棉土壤速效磷含量在蕾期、花铃期和吐絮期与常规棉无显著差异;铵态氮含量在苗期、蕾期和花铃期与常规棉无显著差异;硝态氮含量在吐絮期显著高于常规棉,其余3个时期显著低于常规棉。随生育期推进,转基因高产棉土壤脲酶和过氧化氢酶活性变化趋势与常规棉一致,碱性磷酸酶活性变化趋势与常规棉略有不同。转基因高产棉土壤脲酶活性在苗期、蕾期和吐絮期显著高于常规棉,在花铃期无显著差异;过氧化氢酶活性在苗期和吐絮期与常规棉无显著差异;碱性磷酸酶活性只在吐絮期与常规棉无显著差异。表明,土壤养分和酶活性受转基因高产棉的影响较小,其变化主要受到生育期的影响。

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