双行凹型垄及地膜覆盖对烟叶和土壤中磷含量的影响
Chinese Tobacco Science(2008)
Abstract
采用田间试验与室内分析相结合的方法,探讨了烤烟地膜覆盖与双行凹型垄结合对烤烟及土壤磷素含量的影响。结果表明,对烤烟烟株磷的积累量的影响表现为双行凹型垄全生育期盖膜并遇旱灌溉(1.95 g/株)>双行凹型垄地膜全生育期盖膜(1.81 g/株)>单行垄盖膜团棵揭膜(1.69 g/株)>双行凹型垄盖膜团棵揭膜(1.56 g/株);距烟株5 cm、15 cm和25 cm的3个取样点均以旺长初期土壤速效磷含量最高;在旺长初期,两个团棵揭膜处理均表现出距烟株较近的位点速效磷含量较低,而采烤后表现相反;双行垄全生育期盖膜能促进速效磷向表层富集,灌溉能缓解这种富集现象。
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Key words
film mulching,phosphorus,cultivated soil,double-row concave ridge
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