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Effects of Long-term Fertilization on Accumulation of NO_3~--N in Profile of Red Soil Dry Land
Author(s): 
Pages: 60-62,65
Year: Issue:  1
Journal: Hunan Agricultural Sciences

Keyword:  red soil dry landlong-term fertilizationNO_3-N;
Abstract: 研究了长达18 a长期不同施肥处理下红壤旱地剖面中NO_3~--N分布和累积的特征.结果表明:施用化肥的处理中,磷肥和有机肥料的施用能显著降低NO_3~--N在0-100 cm土体中的积累(P<0.05);不同施肥处理(除氮钾处理),均在40~60 cm之间形成NO_3~--N累积层.氮钾配施的旱地土壤20~40cm层中NO_3~--N峰值最高达70.72 mg/kg:各施肥处理NO_3~--N残...
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