| 有机酸对红壤磷素吸附特性的影响 |
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| 引用本文： | 王艳玲,朱红霞,王琳,何园球. 有机酸对红壤磷素吸附特性的影响[J]. 土壤通报, 2011, 0(3) |
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| 作者姓名： | 王艳玲 朱红霞 王琳 何园球 |
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| 作者单位： | 南京信息工程大学江苏省农业气象重点实验室应用气象学院;中国科学院南京土壤研究所; |
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| 基金项目： | 国家自然科学基金项目(40901146); 江苏省高校自然科学研究项目(10KJB210003); 江苏省高校“青蓝工程”资助 |
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| 摘 要： | 以不同供磷水平的旱地红壤为材料,探讨了柠檬酸、酒石酸和草酸对红壤磷素吸附特性的影响。试验结果表明,经有机酸培育后的红壤磷的吸附曲线与Langmuir方程吻合性很好,相关系数可达0.949~0.999。有机酸可使磷的吸附曲线类型发生转变,柠檬酸可使土壤磷的吸附等温线由第Ⅱ类型转化为第Ⅲ类型,酒石酸可改变CK与NPK处理的吸附类型,而草酸没有影响。柠檬酸可使土壤的Xm降低30%~75.3%,以PM处理中的降低程度最大。酒石酸和草酸却在不同程度上使土壤的Xm增大,二者可使Xm分别增加0.8~2.3倍和0.1~0.3倍。三种有机酸均可减小平衡常数K值,提高土壤磷素的吸附饱和度,对磷素吸附特征值的影响程度大小顺序为:柠檬酸>酒石酸>草酸。在磷素利用率低的红壤中,增施有机肥或配施有机肥是提高土壤磷素生物有效性的最佳途径。
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| 关 键 词： | 有机酸 磷 吸附特性 红壤 |
Effect of Organic Acids on Phosphorus Adsorption Characteristic in Red Soil |
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| WANG Yan-ling ,ZHU Hong-xia ,WANG Lin ,HE Yuan-qiu. Effect of Organic Acids on Phosphorus Adsorption Characteristic in Red Soil[J]. Chinese Journal of Soil Science, 2011, 0(3) |
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| Authors: | WANG Yan-ling ZHU Hong-xia WANG Lin HE Yuan-qiu |
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| Affiliation: | WANG Yan-ling 1,ZHU Hong-xia 1,WANG Lin 1,HE Yuan-qiu 2(1.Key Laboratory of Agricultural Meteorology of Jiangsu Province,College of Applied Meteorology,Nanjing University of Information Science and Technology,Nanjing 210044,China,2.Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China) |
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| Abstract: | Effect of organic acids on phosphorus adsorption characteristic in red soil was studied in the present study.Soil samples were collected from the long-term experiment that had been applied with different levels of P fertilizer for 19 years.Soil phosphorus adsorption curves,soil pH and Olsen-P were measured for the samples that had been incubated by the water content of 20% under room temperature for three weeks.Citric acid,tartaric acid or oxalic acid was added by the concentration of 0.1 mM g-1 soil for ea... |
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| Keywords: | Organic acid Phosphorus Adsorption characteristic Red soil |
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