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yan jian hua qi geng di kai ken qian hou tu rang yang fen han liang de bian hua
Author(s): 
Pages: 64-66,67
Year: Issue:  4
Journal: Xinjiang Farmland Reclamation Science & Technology

Keyword:  弃耕地盐碱化开垦养分循环;
Abstract: 本研究采用田间定位试验,以玛纳斯河流域盐碱化弃耕地为研究对象,探究开垦前后土壤基本养分含量的变化。结果表明,弃耕地开垦后土壤有机碳较开垦前增加24.1%。土壤速效磷、碱解氮和速效钾平均含量开垦后较开垦前显著增加。从土层来看,开垦前后土层之间差异显著,均随土层加深呈现下降趋势。开垦后土壤全磷和全钾较开垦前显著增加,开垦前后土壤全磷平均含量分别为0.7 mg/kg和0.8 mg/kg;全钾平均含量分别为22.9 mg/kg和24.8 mg/kg。土壤碳、氮、磷在整个土壤养分循环中是相互耦合的。
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