皇甫川流域不同水土治理方式下土壤钾含量的变化

The Change of Kalium Content in Soil Applying Different Vegetation Treading Measurements in Huangfuchuan Watershed

本文采用NaOH熔融法,原子吸收分光光度法和NH4OAc浸提,原子吸收分光光度法,分别测定了皇甫川流域五分地沟试验区不同植被治理措施下土壤的全K和速效K含量,对测定结果的分析表明:①不同治理措施下,土壤中全K含量的大小次序是:人工草地>农田>人工灌木>退化草地>次生草地>人工林地>百里香草原,土壤中速效K含量的大小次序是:人工林地>百里香草原>人工灌木>退化草地>农田>次生草地>人工草地。②不同治理方式对土壤钾含量提高的差异明显,灌草类植被对土壤钾的提高效果较好,杨树林对土壤钾的恢复效果稍差。

In this paper,melt method AAS and extraction method AAS were used to measure soil total kalium and soil available kalium and applying different Vegetation treading measurements in Huangfuchuan watershed wufendigou Cathment.Experimental analysis shows that the oder of total kalium in soil isartificialgrasslandfarmlandartificialshrubsdegradedgrasslandSecondary grassland artificial forestThymas serpyllum community and the order of soilavailablekaliumisartificialforestThymusserpyllumcommunityartificialshrubsdegeneratedgrasslandfarmlandsecondarygrasslandartificialgrassland.Testing result also reveal that the increase of soil kalium content is obvious in different treatment methods： shrubs and grass vegetation treating method is better in improving the soil kalium content and populus forest treating method is worse for restoration of soil kalium content.