Factors that affect phosphorus leaching threshold and its prediction in dryland soils of Danjiangkou...
Factors that affect phosphorus leaching threshold and its prediction in dryland soils of Danjiangkou Reservoir area
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Huang, Yijing , Wang, Jie , Yang Bangge , Xiong, Yi , Geng Tongtong and Cai Chongfa
Publisher
Tianjin: Journal of Agricultural Resources and Environment (JARE)
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Language
Chinese
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Tianjin: Journal of Agricultural Resources and Environment (JARE)
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为探究丹江口库区旱地土壤磷淋溶流失机制及其淋溶阈值的预测，以丹江和汉江的4个小流域为研究区，共采集研究区内20个典型旱作耕地土壤，测定其理化性质与土壤磷吸附特征参数，并通过室内培养试验获得土壤磷淋溶阈值（Phosphorusleaching threshold，Plth），通过路径分析探究了不同土壤Plth对土壤性质及磷吸附特性的响应，采用主成分分析探究了Plth的主控因子，并依此对其进行预测。结果表明：研究区土壤Plth范围在16.34~93.84 mg·kg-1之间，部分样点土壤速效磷（Olsen-P）含量接近甚至高于其Plth，具有极大流失风险。相关性分析表明，Plth是众多土壤性质共同作用的结果，与土壤pH呈极显著负相关（R2=0.81，P<0.001），与土壤总磷（Total ph...
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Factors that affect phosphorus leaching threshold and its prediction in dryland soils of Danjiangkou Reservoir area
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TN_cdi_proquest_journals_3167898067
Permalink
https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_proquest_journals_3167898067
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ISSN
2095-6819
E-ISSN
2095-6819
DOI
10.13254/j.jare.2023.0664
