Effects of Ecological Grass Furrow on Regulation of Nitrogen and Phosphorus and Reduction of Runoff Pollution in Farmland

XI Peidong; HE Binghui; FENG Mengdie; ZHANG Jianle; WANG Zhenfang

doi:10.13870/j.cnki.stbcxb.2018.02.008

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Effects of Ecological Grass Furrow on Regulation of Nitrogen and Phosphorus and Reduction of Runoff Pollution in Farmland

更新时间：2025-03-12

- Effects of Ecological Grass Furrow on Regulation of Nitrogen and Phosphorus and Reduction of Runoff Pollution in Farmland
- Vol. 32, Issue 2, Pages: 52-57(2018)
- 作者机构：
  
  西南大学资源环境学院,重庆,400715
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.02.008
  CLC： TV121.1;TV213.9
- Published：2018
- 稿件说明：
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XI Peidong, HE Binghui, FENG Mengdie, et al. Effects of Ecological Grass Furrow on Regulation of Nitrogen and Phosphorus and Reduction of Runoff Pollution in Farmland[J]. 2018, 32(2): 52-57.
DOI：

XI Peidong, HE Binghui, FENG Mengdie, et al. Effects of Ecological Grass Furrow on Regulation of Nitrogen and Phosphorus and Reduction of Runoff Pollution in Farmland[J]. 2018, 32(2): 52-57. DOI： 10.13870/j.cnki.stbcxb.2018.02.008.

摘要

为研究生态草沟对径流污染物的削减效益，探究在西南地区农地内运用生态草沟来辅助地块排水和控制面源污染的可行性。试验着眼于地块单元，与农地地块内传统的土质沟道（CK）相对照，借助对模拟生态草沟的冲刷试验，根据不同试验要求调整模拟污水的成分，通过与清水冲刷对比，以研究生态草沟对污染物的削减效果。结果表明：（1）5°农地生态草沟对污水径流中COD负荷具有一定的削减作用，其削减COD污染负荷比例在8.86%～14.00%，但当生态草沟坡度比降为10°时反而增加了径流中的COD污染负荷，增加比例达到了20.38%～33.02%。（2）分析不同坡度和不同设计冲刷流量下农地生态草沟对污水径流中总氮的去除效率，发现大部分试验组农地生态草沟相比传统的土质沟道能部分去除径流中的总氮负荷，去除比例为2.46%～33.39%。（3）分析不同坡度和不同设计冲刷流量下农地生态草沟对污水径流中总磷的去除效率，设计冲刷流量为4.5 L/min时农地生态草沟中磷素流失量大于设计径流（3 L/min）时，二者磷素流失量相差0.005 9～0.037 7 g/m2，相差比例为4.71%～25.02%。沟道坡度比降为5°时，沟道流失的磷素随径流流失的比例更大，平均达到63.32%；当沟道坡度比降上升为10°时，沟道流失的磷素随泥沙流失的比例更大，平均为70.95%，达到较高水平。

Abstract

This study explored the feasibility of ecological grass furrow to assist drainage and control non-point pollution in agricultural land of southwest China. Experiments were conducted in farmland block unit. Traditional soil furrow in farmland plots was taken as CK. Through the scouring test of the ecological grass furrow to explore the benefits of ecological grass furrow to runoff pollutant reduction. This experiment used simulated sewage，according to different requirements to adjust the sewage composition to explore the reduction effect of ecological grass furrow on pollutant. The research results showed: (1) The 5° agricultural land furrow had a certain reduction for the sewage runoff COD load

and the reduction was between 8.86% to 14.00%. However

when the ecological grass furrow gradient reached 10°

the COD pollution load in the runoff increased by 20.38% to 33.02%. (2) For the removal efficiency of total nitrogen

it was found that the total nitrogen load in the runoff was significantly higher in agricultural land furrow than that in the traditional soil furrow

and the removal efficiency ranged between 2.46% and 33.39%. (3) For the total amount of phosphorus loss

when the flow rate was 4.5 L/min

the phosphorus loss in the ecological grass furrow was larger than the designed runoff of 3 L / min

and the difference of phosphorus loss was between 0.005 9 and 0.037 7 g/m2

the rate was between 4.71% and 25.02%. When the agricultural land furrow reached 5°

the loss of phosphorus in furrow increased with the increase of runoff

and reached 63.32%. When the agricultural land grass furrow gradient reached 10°

the proportion of phosphorus loss in furrow increased with the sediment loss

and reached 70.95%.

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NING Jian-feng,XU Pei-zhi,YANG Shao-hai,ZOU Xian-zhong,LUO Wen-jian,CHEN Yong,SUN Li-li,WEI Lan,WU Jin-long(Soil and Fertilizer Institute,Guangdong Academy of Agricultural Sciences,Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation,,)

北京市农林科学院植物营养与资源研究所,北京,1000972. 北京市农林科学院植物营养与资源研究所,北京,1000973. 南京大学地理与海洋科学学院

WEI Zong-qiang1,2,LI Ji-jin2,WU Shao-hua1(1.School of Geographic and Oceanographic Science,Nanjing University,Nanjing 210093,2.Institute of Plant Nutrition and Resources,Beijing Academy of Agriculture and Forestry Sciences,)

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