不同农作措施下红壤坡耕地土壤钾素流失特征的研究

应用生态学报 ›› 2003, Vol. ›› Issue (8): 1257-1260.

不同农作措施下红壤坡耕地土壤钾素流失特征的研究

袁东海¹, 王兆骞¹, 陈欣¹, 郭新波¹, 张如良²

1. 浙江大学农业生态研究所, 杭州 310029;
2. 浙江兰溪水土保持监督站, 兰溪 321100

收稿日期:2001-08-23 修回日期:2002-02-24 出版日期:2003-08-15
通讯作者: 袁东海,男,1964年生,副教授,博士研究生,工作单位:安徽农业大学士化系,主要从事水土资源利用与管理的教学与研究工作,发表论文10余篇.
基金资助:
国家自然科学基金重点资助项目(30030030)

Properties of potassium loss from red soil slope land in different farming systems

YUAN Donghai¹, WANG Zhaoqian¹, CHEN Xin¹, GUO Xinbo¹, ZHANG Ruliang²

1. Institute of Agroecology, Zhejiang University, Hangzhou 310029;
2. Lanxi Soil and Water Conservation Supervision Station, Zhejiang Province, Lanxi 321100

Received:2001-08-23 Revised:2002-02-24 Online:2003-08-15

摘要/Abstract

摘要： 研究了6种农作措施下红壤坡耕地土壤钾素的流失特征.结果表明,红壤坡耕地土壤钾素的地表流失主要是以推移质形式和径流形式流失的;在泥砂流失量较小的等高农作、等高土埂处理的坡耕地,土壤钾素主要以径流形式流失;休闲处理的坡耕地通过径流流失的钾素和推移质流失的钾素基本相当,而在泥砂流失量较大的顺坡农作处、水平草带、水平沟处理的坡耕地土壤钾素主要以推移质形式流失.在径流流失的钾素中,又以泥砂结合态为主.除顺坡农作处理以外,其它农作措施均有控制土壤钾素流失的作用,等高农作、休闲、等高土埂等农作措施优于水平草带和水平沟农作措施.2000年红壤坡耕地土壤钾素的流失时间主要集中在5～8月份.

Abstract: The properties of potassium loss in red soil slope field under six cultivations were studied. The results showed that potassium lost mainly with bed load and runoff on surface of soil. The potassium lost mostly with runoff in slope field under contour, contour dam cultivated ways with less sediment except the fallow, under which the loss of potassium with bed load equaled to the loss of potassium with runoff. The potassium lost mostly with bed load in slope field under straight, grass strip and contour ditch cultivated ways with more sediment, and particulate potassium was the main form of potassium lost in runoff. Compared with straight cultivated way, other cultivated ways reduced soil potassium loss significantly. Contour, fallow, and contour dam cultivated ways were better than straight and grass stripe cultivated ways on controlling potassium loss. In the year of 2000, the potassium loss was mainly occurred during May to August accounting for 87.24～100% of total annual lost.

中图分类号:

153.6

袁东海, 王兆骞, 陈欣, 郭新波, 张如良. 不同农作措施下红壤坡耕地土壤钾素流失特征的研究[J]. 应用生态学报, 2003, (8): 1257-1260.

YUAN Donghai, WANG Zhaoqian, CHEN Xin, GUO Xinbo, ZHANG Ruliang. Properties of potassium loss from red soil slope land in different farming systems[J]. Chinese Journal of Applied Ecology, 2003, (8): 1257-1260.

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