Effects of Artificial Rainfall on Dynamics of Nitrogen and Phosphorus in Paddy Field

FENG Guo-lu; GONG Jun-hui

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Effects of Artificial Rainfall on Dynamics of Nitrogen and Phosphorus in Paddy Field

更新时间：2024-11-07

- Effects of Artificial Rainfall on Dynamics of Nitrogen and Phosphorus in Paddy Field
- Vol. 25, Issue 2, (2011)
- 作者机构：
  
  吉首大学,生态旅游重点实验室,湖南,张家界,427000
- 作者简介：
- 基金信息：
- DOI：
  CLC： S157.1
- Published：2011
- 稿件说明：
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FENG Guo-lu, GONG Jun-hui. Effects of Artificial Rainfall on Dynamics of Nitrogen and Phosphorus in Paddy Field[J]. 2011, 25(2).
DOI：

FENG Guo-lu, GONG Jun-hui. Effects of Artificial Rainfall on Dynamics of Nitrogen and Phosphorus in Paddy Field[J]. 2011, 25(2). DOI：

摘要

在水稻黄熟期

通过对微区模拟稻田进行人工降雨试验

分析了60

17.4 mm/h 3个雨强处理(分别表示为y-b、y-m、y-s)条件下

不同滞水时间的田面水中氮磷的动态特征以及总氮、总磷的流失潜能

研究了不同雨强和滞水时间对稻田氮磷的减排效能。结果表明:(1)在3个雨强处理下

田面水中TN浓度在人工降雨后1 h为最高

y-s的田面水中TN浓度下降迅速;y-m和y-b的田面水积聚量较大

但在第5 d时其TN浓度也迅速下降到最低值。田面水中NH+4-N浓度整体水平较低

NO-3-N浓度总体水平较高

但随时间推移呈逐渐下降的趋势。(2)3个雨强处理的田面水中TP和DP浓度总体上表现为y-b>y-m>y-s

呈升-峰值-降的趋势。(3)降雨处理后若延迟排水时间至第5 d

模拟稻田的相对减排效能最大

可减少排放田面水中TN80.44%~94.14%。如延迟稻田排水时间到第3~5 d

y-b和y-m的田面水中TP的减排效能显著

可减少排放田面水中TP 9.95%~100.00%。

Abstract

In this paper

the artificial rainfall test in the rice mature period has been made in macro-area paddy simulation.The dynamic characteristics of nitrogen and phosphorus and the losing potential of total nitrogen(TN) and total phosphorus(TP) in water under 60

17.4 mm/h rain intensity(expressed as y-b

y-m and y-s respectively) and different delay time as well as the effect of different rain intensity and delay time on reducing discharge have been analyzed.The results showed:(1) The TN concentration in wate...

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