| 有机酸对红壤磷素吸附特性的影响 |
| |
| 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(3). |
| |
| 作者姓名： | 王艳玲 朱红霞 王琳 何园球 |
| |
| 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; |
| |
| 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 |
| |
| 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。
|
| 关 键 词： | 有机酸 磷 吸附特性 红壤 |
Effect of Organic Acids on Phosphorus Adsorption Characteristic in Red Soil |
| |
| 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(3). |
| |
| Authors: | WANG Yan-ling ZHU Hong-xia WANG Lin HE Yuan-qiu |
| |
| Institution: | 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) |
| |
| 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... |
| |
| Keywords: | Organic acid Phosphorus Adsorption characteristic Red soil |
| 本文献已被 CNKI 等数据库收录！ |
|
