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- Title
Characteristics of paddy field nitrogen leakage and runoff in rice-duck farming system.
- Authors
Yu Xiang; Wang Qiang-sheng; Wang Shao-hua; Liu Zheng-hui; Wang Xia-wen; Ding Yan-feng
- Abstract
A field experiment was conducted to study the characteristics of paddy field nitrogen (N) leakage and runoff under rice-duck farming (MRD),conventional farming (MR),and conventional farming with flooding (CK). Comparing with that under MR,the paddy field under MRD had a notable decrease of N (especially NO3--N) concentration in its leaked liquid; but this concentration was tended to be increased,compared with that under CK. After 7-9 days of fertilization,the NH4+-N and NO3--N concentrations in paddy field surface water were higher under MRD than under MR. However,owing to the no draining and the higher band,the paddy field under MRD had a notable reduction of drainage,resulting in a marked decrease of N runoff than that under MR. Comparing with MR,the paddy field under MRD had an addition of nitrogen supply from duck dung,a reduction of N leakage and runoff,a lesser application of chemical nitrogen fertilizer,and more nitrogen uptake by rice plant. Both the reduction of N input and that of N output in rice-duck farming system were nearly equal in quantity.
- Subjects
RICE field irrigation; RUNOFF; DRAINAGE; AGRICULTURE; NITROGEN in agriculture; WATER pollution; NITROGEN fertilizers
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 1, p143
- ISSN
1001-9332
- Publication type
Article