| 太湖地区典型水稻土土壤磷素径流流失及其吸持特征的研究 |
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| 引用本文： | 张红爱.太湖地区典型水稻土土壤磷素径流流失及其吸持特征的研究[J].安徽农业科学,2008,36(18). |
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| 作者姓名： | 张红爱 |
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| 作者单位： | 广东省林业调查规划院,广东广州,510520;南京林业大学,江苏南京,210037 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 目的]为控制农业非点源污染提供科学依据。方法]在稻麦两熟种植制度下,研究了太湖地区爽水型、囊水型两种典型水稻土磷素地表径流流失状况和对磷的吸附特性。结果]在常规施磷水平下,囊水型水稻土土壤磷素年径流流失量大于爽水型水稻土。2000~2001年度的地表径流磷流失量分别为603.26、79.5 g/(hm2.a),而在2001~2002年度时分别为1 148.91、350.3 g/(hm2.a)。爽水型水稻土表层土壤磷的最大吸附量(Qm)和最大缓冲容量(MBC)分别为769.23 mg/kg和130.00 L/kg,均高于囊水型水稻土的Qm(666.67 mg/kg)和MBC(66.00 L/kg)。囊水型水稻土的PSI值低于爽水型水稻土,二者的PSI值均小于30。结论]囊水型水稻土磷素更易流失。
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| 关 键 词： | 水稻土 土壤磷素 地表径流 富营养化 磷吸持指数 |
Research on P Runoff Loss in Paddy Soils in the Taihu Lake Region and Its Sorption Characters |
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| ZHANG Hong-ai.Research on P Runoff Loss in Paddy Soils in the Taihu Lake Region and Its Sorption Characters[J].Journal of Anhui Agricultural Sciences,2008,36(18). |
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| Authors: | ZHANG Hong-ai |
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| Abstract: | Objective] The study aimed to provide a scientific base to control the pollution of agricultural non-point sources.Method] Under the double ripe planting system of rice and wheat,the state of P runoff losses and its absorption characters in two kinds of typical paddy soils(the permeable and waterlogged paddy soils) were studied.Result] The yearly surface runoff P loss in waterlogged paddy soils was bigger than that in permeable paddy soils at the normal level of applying P,that was 603.2 and 679.5 g/(hm2·a) resp.in 2000～2001 year and that was 1 148.9 and 1 350.3 g/(hm2·a) in 2001～2002 year.The biggest adsorption quantity(Qm,769.23 mg/kg)and buffer capacity(MBC,130.00 L/kg)of soil surface P in permeable paddy soils was higher than that in waterlogged paddy soils(Qm and MBC of 666.67 mg/kg and 66.00 L/kg resp.).The PSI value of waterlogged paddy soils was lower than that of permeable paddy soils and their value were all lower than 30.Conclusion] The P was more easier runoff in waterlogged paddy soils. |
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| Keywords: | Paddy soil Soil P Surface runoff Eutrophication PSI |
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