不同农作方式红壤坡耕地土壤氮素流失特征

应用生态学报 ›› 2002, Vol. ›› Issue (7): 863-866.

不同农作方式红壤坡耕地土壤氮素流失特征

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. 浙江省兰溪市水土保持监督站, 兰溪 321100

收稿日期:2001-08-23 修回日期:2002-02-28 出版日期:2002-07-15
通讯作者: 袁东海,男,1964年生,副教授,博士研究生,现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.E-mail:donghaiyuan@163.com
基金资助:
国家自然科学基金重点资助项目(30030030).

Characteristics of nitrogen loss from sloping field in red soil area under different cultivation practices

YUAN Donghai¹, WANG Zhaoqian¹, CHEN Xin¹, GUO Xinbo¹, ZHANG Ruliang ²

Institute of Agroecology, Zhejiang University, Hangzhou 310029

Received:2001-08-23 Revised:2002-02-28 Online:2002-07-15

摘要/Abstract

摘要： 采用径流小区法研究了6种不同农作方式土壤N素的流失特征.结果表明,同顺坡农作方式相比,其它农作方式均有明显控制土壤N素流失的作用,水平草带、水平沟、等高耕种、休闲、等高土埂等农作方式分别减少土壤N素流失量43.46%、46.55%、71.36%、77.05%和87.92%,等高耕种、等高土埂、休闲等农作方式控制土壤N素流失优于水平沟和水平草带农作方式.坡耕地土壤N素的流失途径主要为径流流失,约占土壤N素流失量81.9%～93.4%,径流流失的N素中又以水溶态N素为主,约占径流流失N素的78%～87.6%.坡耕地土壤N素流失主要集中在5～8月份,占全年流失量的85%～100%.

关键词: 农作方式, 坡耕地, 红壤, N素流失

Abstract: The characteristics of nitrogen loss under six types of cultivation practices were studied in Lanxi Water and Soil Conservation Supervision Station of Zhejiang Province. The results showed that compared with the traditional cultivation practice (treatment 5, straight farming), the other cultivation practices including grass strip, contour ditch, contour farming, contour dam, and fallow decreased soil nitrogen loss significantly, and the percentages of nitrogen loss under the 5 types of cultivation practices decreased by 43.46%, 46.55%, 71.36%, 77.05%, and 87.92%, respectively. Soil nitrogen lost mainly with runoff, and it accounted for 81.9～93.4% of total soil nitrogen loss. Dissolved nitrogen was the major form of lost nitrogen and accounted for 78～87.6% of total lost nitrogen in runoff. Nitrogen loss was occurred mainly during May to August, and it accounted for 85～100% of total annual nitrogen loss.

Key words: Cultivated practice, Sloping field, Red soil, Nitrogen loss

中图分类号:

S143.1

袁东海, 王兆骞, 陈欣, 郭新波, 张如良. 不同农作方式红壤坡耕地土壤氮素流失特征[J]. 应用生态学报, 2002, (7): 863-866.

YUAN Donghai, WANG Zhaoqian, CHEN Xin, GUO Xinbo, ZHANG Ruliang . Characteristics of nitrogen loss from sloping field in red soil area under different cultivation practices[J]. Chinese Journal of Applied Ecology, 2002, (7): 863-866.

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