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Soil Composition of Carbon、Nitrogen and Phosphorus after Successive Years of Alfalfa Planting in the Gullies of the Loess Plateau
Authors
张春霞
李丽霞
郝明德
Publication date
1 January 2005
Publisher
Abstract
对黄土高原沟壑区不同种植年限苜蓿(Medicagosativa)地土壤碳、氮、磷组分的分析结果表明:连续种植5年,土 壤碳、氮各组分含量最低,而年限延长含量则有所提高;15年生苜蓿生长已进入衰退期,各组分含量远低于土壤肥力得 到一定程度恢复的23年生苜蓿地。P与C、N组分的变化不同,Ca2-P和Fe-P含量随年限延长逐渐降低,到23年时又有 升高趋势,而Ca8-P、Al-P、O-P变化趋势则与之相反,5年生苜蓿地以中活性有机磷为主,10年、15年、23年生苜蓿土壤 有机磷组分的变化表现为:中稳性有机磷(MROP)>中活性有机磷(MLOP)>高稳性有机磷(HROP)>活性有机磷 (LOP)
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018