Impact of Furrow Slopes on Losses of Dissolved Nitrogen and Phosphorus Under Simulated Rainfall

HU Xiaodie; ZHANG Hanyu; LIU Qianjin; XU Xiangzhong; QIU Dexun; MA Liang

doi:10.13870/j.cnki.stbcxb.2019.06.006

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Impact of Furrow Slopes on Losses of Dissolved Nitrogen and Phosphorus Under Simulated Rainfall

更新时间：2025-03-12

- Impact of Furrow Slopes on Losses of Dissolved Nitrogen and Phosphorus Under Simulated Rainfall
- Vol. 33, Issue 6, Pages: 41-46(2019)
- 作者机构：
  
  1. 山东省水土保持与环境保育重点实验室, 临沂大学资源环境学院,山东,临沂,276005
  2. 山东省水利科学研究院, 山东水土保持学会,济南,250013
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.06.006
  CLC：
- Published：2019
- 稿件说明：
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HU Xiaodie, ZHANG Hanyu, LIU Qianjin, et al. Impact of Furrow Slopes on Losses of Dissolved Nitrogen and Phosphorus Under Simulated Rainfall[J]. 2019, 33(6): 41-46.
DOI：

HU Xiaodie, ZHANG Hanyu, LIU Qianjin, et al. Impact of Furrow Slopes on Losses of Dissolved Nitrogen and Phosphorus Under Simulated Rainfall[J]. 2019, 33(6): 41-46. DOI： 10.13870/j.cnki.stbcxb.2019.06.006.

摘要

为揭示不同垄沟坡度对径流中溶解态氮、磷流失的影响，采用人工模拟降雨试验，设置4个垄沟坡度处理（0°，9°，18°和27°），研究了不同垄沟坡度对径流中速效磷（PO43--P）、硝态氮（NO3--N）和铵态氮（NH4+-N）浓度和流失量的影响；并利用Inorganic-N/PO43--P、NO3--N/PO43--P和NH4+-N/PO43--P 3种氮磷比，评价不同处理的富营养化风险。结果表明：（1）在降雨过程中，4个垄沟坡度处理径流中PO43--P、NO3--N和NH4+-N浓度随时间均呈锯齿状变化；其流失量随时间变化均呈先增加后以锯齿状变化的趋势，且波动幅度大，最大值（16.60，1 020.73，48.35 mg）分别出现在垄沟坡度为0°，0°和9°处理。（2）4个垄沟坡度处理间相比较，径流中PO43--P和NH4+-N流失量均表现为0° > 9° > 27° > 18°，其浓度最大值（0.50，1.08 mg/L）和最小值（0.37，0.76 mg/L）均分别出现在垄沟坡度为9°和18°处理；而径流中NO3--N浓度和流失量均在垄沟坡度0°处理时为最大值（30.68 mg/L和64.16 mg/m2），18°处理时为最小值（21.78 mg/L和42.22 mg/m2）。（3）Inorganic-N/PO43--P率和NH4+-N/PO43--P率表明4个垄沟坡度处理径流中均存在一定的富营养化风险。其中，垄沟坡度为0°处理的径流富营养化风险水平最高，27°处理的径流富营养化风险水平最低。研究结果可为横坡垄作的水土流失及养分流失评价、预测以及防治提供科学依据。

Abstract

This study explored the effects of four furrow slopes (0°

9°

18° and 27°) on the concentrations and losses of PO43--P

NO3--N and NH4+-N through simulated rainfall experiments

and evaluated eutrophication risk of the runoff by the ratios of Inorganic-N/PO43--P

NH4+-N/PO43--P

and NH4+-N/PO43--P. The results were as follow:(1) PO43--P

NO3--N

and NH4+-N concentrations changed in the shape of wavy serrated shape with rainfall time under four furrow slopes. As for losses

their maximum value (16.60

1 020.73

48.35 mg) appeared in 0°

0°

and 9° when they increased firstly and then changed in zigzag shape with rainfall time. (2) Under different furrow slopes

PO43--P and NH4+-N losses in runoff water were in order of 0° > 9° > 27° > 18°

whose concentration maximum value (0.50

1.08 mg/L) and minimum value (0.37

0.76 mg/L) appeared in 9° and 18°. NH4+-N concentration and losses maximum value (30.68 mg/L and 64.16 mg/m2) and minimum value (21.78 mg/L and 42.22 mg/m2) appeared in 0° and 18° in runoff water. (3) The ratios of Inorganic-N/PO43--P and NH4+-N/PO43--P showed that four furrow slopes output runoff all had eutrophication risk

and the 0° output runoff of that was the highest and the 27° was the lowest. These findings would provide scientific guidance for evaluation

prediction

and control of soil and water loss and nutrient loss in contour ridge system.

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