| 大豆冠层对降雨再分配的影响 |
| 徐宁1; 杨一凡1; 林青涛1; 吴发启2
|
| 2020
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发表期刊 | 水土保持通报
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卷号 | 40期号:2页码:115-119 |
摘要 | [目的]研究农作物冠层的降雨再分配特征,为区域水土流失治理和生态环境建设提供科学依据。
[方法]以大豆作为研究对象,采取人工模拟降雨法以及喷雾法观测大豆不同生育期(幼苗期、始花期、盛花
期、结荚期和始粒期)以及降雨强度( 40 ,
80mm / h )下的茎秆流量、穿透雨量以及冠层截留量,探究大豆全生
育期的冠层截留分异特征及叶面积指数和降雨强度对大豆降雨再分配的影响。[结果]大豆生育期内,茎
秆流率平均值为 15.02% ,穿透雨率平均值为 83.94% ,冠层截留率平均值仅为 1.04% 。表明冠层截留所
占降雨再分配的比例很小,其对降雨空间分异的影响所占比例较小。随着叶面积指数的增加,大豆的茎秆
流量及茎秆流率,冠层截留量及冠层截留率均显著增加,然而穿透雨强度及穿透雨率显著减小。当降雨强
度由 40mm / h 增大到 80mm / h 时,大豆的茎秆流量显著增加,但茎秆流率随雨强的变化并无显著差异;穿
透雨量随着雨强的增大而增大,且随着雨强的变化存在显著性差异,但穿透雨率随降雨强度的变化并无显
著差异。[结论]大豆冠层对降雨的再分配主要体现在茎秆流以及穿透雨,冠层截留所占比例很小,且叶面
积指数与降雨强度均对降雨再分配有着重要的影响作用。 |
其他摘要 | [ Objective ] The rainfall redistribution characteristics of crop canopy were studied , in order to
provide scientific basis for regional soil erosion control and ecological environment construction. [ Methods ]
Soybean was used as the research object.The artificial rainfall simulation and spray method were used to
observe the stalk flow , penetrating rainfall and canopy interception at different growth stages of soybean
(
seedling stage , initial blossoming
stage , full flowering stage , pod bearing stage and initial pod filling stage )
under different rainfall intensity ( 40 , 80mm / h ), in order to explore the effects of canopy
interception differentiation
characteristics in the whole growth period of soybean and the influence of leaf area index and rainfall intensity
on rainfall redistribution. [ Results ] The average stalk flow rate was 15.02% , the average penetration rate
was 83.94% , and the average canopy interception rate was only 1.04%.It showed that the proportion of
rainfall redistribution in canopy interception to rainfall redistribution was small
, and its influence on rainfall
spatial differentiation was relatively small.With the increase of leaf area index ,
the stalk flow rate and stalk
flow rate , canopy interception and canopy interception rate of soybean increased significantly , but the
penetration rain intensity and penetration rate decreased significantly.When the rainfall intensity
increased
from 40mm / h to 80mm / h , the stalk flow rate of soybean increased significantly , but there was no significant
difference between stalk flow rate and rain intensity.The penetration rainfall increased significantly with theincrease of rain intensity , but there was no significant difference between the penetration rate and the change
of rainfall intensity. [ Conclusion ] The redistribution of rainfall by soybean canopy is mainly reflected in stalk
flow and penetrating rain.Canopy
interception accounts for a small proportion.And both leaf area index and
rainfall intensity have an important effect on rainfall redistribution. |
关键词 | 大豆
降雨再分配
茎秆流
穿透雨
冠层截留
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
|
文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/9910
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.西北农林科技大学 水土保持研究所 2.西北农林科技大学 资源环境学院
|
推荐引用方式 GB/T 7714 |
徐宁,杨一凡,林青涛,等. 大豆冠层对降雨再分配的影响[J]. 水土保持通报,2020,40(2):115-119.
|
APA |
徐宁,杨一凡,林青涛,&吴发启.(2020).大豆冠层对降雨再分配的影响.水土保持通报,40(2),115-119.
|
MLA |
徐宁,et al."大豆冠层对降雨再分配的影响".水土保持通报 40.2(2020):115-119.
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文件名:
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大豆冠层对降雨再分配的影响_徐宁.pdf
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格式:
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Adobe PDF
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