预测农田水分渗漏和氮素淋失的两种模型比较

胡克林; 李保国; 陈德立; R. E. White

预测农田水分渗漏和氮素淋失的两种模型比较

1.
中国农业大学土壤和水科学系, 教育部植物-土壤相互作用重点实验室, 北京, 100094;
2.
澳大利亚墨尔本大学土地和食品学院, 维多利亚, 3052, 澳大利亚

基金项目: 国家重点基础研究发展规划(973)资助项目(G1999011709);中澳合作ACIAR资助项目(LWR1/96/164)

详细信息

作者简介:
胡克林(1971- ),男,湖北钟祥人,中国农业大学副教授,博士,主要从事水土资源空间变异和溶质运移研究.E-mail:hukel@mail.cau.edu.cn

中图分类号: S21;S143.1
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出版历程
- 收稿日期: 2002-11-05
- 修回日期: 2003-02-27
- 刊出日期: 2004-01-24

Comparison of water drainage and nitrate leaching calculated by soil water balance model and dynamic process model

1.
Department of Soil and Water Sciences, China Agricultural University, Beijing 100094, China;
2.
Institute of Land and Food Resources, Melburne University, Parkville Victoria 3052 Australia

Funds: The project is a Key Basic Research Project (973) of China (No.G1999011709).

摘要

摘要: 以田间试验为基础,分别用平衡模型和动力学模型计算了3个小区农田水分渗漏量和氮素淋失量,并对其结果进行了比较,平衡模型计算的水分渗漏量为191～202mm,氮素淋失量为38～63kg·N/hm²;而用动力学模型计算的水分渗漏量为168～234mm,氮素淋失量为27～53kg·N/hm²。造成结果差异的主要原因是:平衡模型没有考虑向上的水流和非饱和流;而动力学模型同时考虑了二者。动力学模型需要大量的田间实测资料,主要应用于农田氮素循环、定量评价水氮资源利用率、优化水肥管理措施等方面。平衡模型仅需要非常少的资料,就能够得到农田水分渗漏量和氮素淋失量,这对精度要求不太高的农田水肥管理来说,不失为一种好方法。
- 动力学模型 /
- 水分渗漏 /
- 氮素淋失 /
- 农田
Abstract: Based on the field data from the three plots of one hectare in Quzhou County on North China Plain,water drainage and nitrate leaching are calculated with a soil water balance model (SWB) and the dynamic process model (DPM).Quantities of water drainage and nitrate leaching calculated by the SWB method range from 191～202 mm and 38～63 kg·N/hm² in 1998/1999 respectively.When the DPM method is used,they range from 168～234 mm and 27～53 kg·N/hm² respectively.The cause for the difference is that the upword and unsaturated water flow is taken into account by the DPM method,but not by the SWB method.The DPM method needs lot of field data,mainly to study nitrogen cycle in field,assess water and nitrogen usage efficiency and optimize management soil water and nitrogen fertilizer.But the SWB needs few field data to calculate the quantities of water drainage and nitrate leaching.The SWB is a good method for management soil water and nitrogen fertilizer in fields without high precision.
- dynamic process model /
- water drainage /
- nitrate leaching /
- field

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参考文献(14)

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预测农田水分渗漏和氮素淋失的两种模型比较

作者简介: 胡克林(1971- ),男,湖北钟祥人,中国农业大学副教授,博士,主要从事水土资源空间变异和溶质运移研究.E-mail:hukel@mail.cau.edu.cn

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出版历程

Comparison of water drainage and nitrate leaching calculated by soil water balance model and dynamic process model

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出版历程

目录

作者简介:
胡克林(1971- ),男,湖北钟祥人,中国农业大学副教授,博士,主要从事水土资源空间变异和溶质运移研究.E-mail:hukel@mail.cau.edu.cn