您好，欢迎访问江西省农业科学院 机构知识库！

Drainage optimization of paddy field watershed for diffuse phosphorus pollution control and sustainable agricultural development

文献类型： 外文期刊

作者： Liu, Lianhua 1 ; Ouyang, Wei 1 ; Liu, Hongbin 2 ; Zhu, Jianqiang 3 ; Fan, Xianpeng 4 ; Zhang, Fulin 4 ; Ma, Youhua 5 ; Ch 1 ;

作者机构： 1.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Nonpoint Source Pollut Control, Minist Agr, Beijing 100081, Peoples R China

3.Yangtze Univ, Coll Agr, Jingzhou 434025, Peoples R China

4.Hubei Acad Agr Sci, Inst Plant Protect Soil & Fertilizer Sci, Wuhan 430064, Hubei, Peoples R China

5.Anhui Agr Univ, Coll Resource & Environm, Hefei 230036, Peoples R China

6.Jiangxi Acad Agr Sci, Inst Soil & Fertilizer & Resources & Environm, Nanchang 330200, Jiangxi, Peoples R China

关键词： Diffuse pollution; Paddy field water level; Ditch and pond; Phosphorus retention

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN： 0167-8809

年卷期： 2021 年 308 卷

页码：

收录情况： SCI

摘要： Rice cultivation consumes abundant irrigation water and fertilizer, which has negative environmental effects. Therefore, water and fertilizer use efficiencies need to be enhanced while ensuring yields, to guarantee sustainable production and reduce diffuse pollution. Paddy rice fields are usually connected with ditches and ponds in the dominant rice planting regions in southern China. However, the influence of drainage optimization on sustainable rice production from source (paddy fields) to process (ditches and ponds) is still unclear. Based on a typical rice cultivation region, a two-year field experiment and a long-term watershed simulation were conducted to evaluate the comprehensive effectiveness of optimizing drainage of paddy field watershed. The results showed that 89.23 % of diffuse P loss from paddy fields via surface runoff occurred during the early growth stages, and particulate P was the main form. Increasing the maximum ponding water level (H-max) of paddy fields reduced surface runoff without yield loss, and diffuse P loss from paddy fields was decreased by more than 27.18 % after increasing H-max from 50-80 mm to 60-180 mm at various rice growing stages. In addition, the currently unavoidable diffuse P loss from paddy fields could be effectively intercepted by ditches and ponds. When the Manning's roughness coefficient of ditch was increased from 0.1 to 0.35, the reduction rate of watershed P loss increased from 1.18 % to 16.02 %, while the reduction rate increased from 10.15 % to 16.52 % when the drainage area of ponds was increased by 50 %. Overall, more rainfall, drainage water and diffuse P can be intercepted by drainage optimization in the paddy field watershed, which would decrease irrigation water requirement and increase fertilizer use efficiency. These results highlight the significant effects of optimizing drainage by increasing the earthen levees of paddy fields to 120-180 mm, maintaining vegetation of ditches, and expanding drainage area of ponds. The proposed measures require more farmers' labour for maintenance. If extensive implementation can be realised, for example with government's incentive policies, this could represent a big step forward in the effective diffuse pollution control and sustainable agricultural development in China and other rice planting countries.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台