间歇降雨和多场次降雨条件下黄土坡面土壤水分入渗特性

应用生态学报

间歇降雨和多场次降雨条件下黄土坡面土壤水分入渗特性

李毅^1,2;邵明安²

¹西北农林科技大学水利与建筑工程学院，陕西杨凌 712100；²中国科学院/水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室，陕西杨凌 712100

收稿日期:2007-08-03 修回日期:1900-01-01 出版日期:2008-07-20 发布日期:2008-07-20

Infiltration characteristics of soil water on loess slope land under intermittent and repetitive rainfall conditions.

LI Yi^1,2;SHAO Ming-an²

¹College of Water Resources and Architecture Engineering, Northwest Sci
Tech University for Agriculture and Forestry, Yangling 712100, Shaanxi, China;²State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China

Received:2007-08-03 Revised:1900-01-01 Online:2008-07-20 Published:2008-07-20

摘要/Abstract

摘要： 基于可控的坡面间歇降雨和多场次降雨试验，对黄土坡面土壤水分入渗及分布特征进行了研究.结果表明：间歇降雨条件下，两次降雨期间的累积径流量均随降雨历时的延长呈近似线性增加，湿润锋也随降雨时间的延长而增加；在两次降雨的间歇期，湿润锋增加缓慢.入渗率随着坡度的增大而减小，第2次降雨的入渗率随时间而减小的趋势更明显；15°坡面的累积入渗量比25°大，分别为178和88 mm.多场次降雨条件下，各场次降雨的初始入渗率均较高，其中第1场降雨的土壤入渗率、累积入渗量在各时段均明显高于其他场次，后3场降雨的入渗率差异不大；降雨场次越多，湿润锋越深.

关键词: 番茄, 盐碱胁迫, 亚精胺, 氮代谢, 矿质元素

Abstract: Based on the experiments of controlled intermittent and repetitive rainfall on slope land, the infiltration and distribution characteristics of soil water on loess slope land were studied. The results showed that under the condition of intermittent rainfall, the cumulative runoff during two rainfall events increased linearly with time, and the wetting front also increased with time. In the interval of the two rainfall events, the wetting front increased slowly, and the infiltration rate was smaller on steeper slope than on flat surface. During the second rainfall event, there was an obvious decreasing trend of infiltration rate with time. The cumulative infiltration on 15° slope land was larger than that of 25° slope land, being 178 mm and 88 mm, respectively. Under the condition of repetitive rainfall, the initial infiltration rate during each rainfall event was relatively large, and during the first rainfall, both the infiltration rate and the cumulative infiltration at various stages were larger than those during the other three rainfall events. However, after the first rainfall, there were no obvious differences in the infiltration rate among the next three rainfall events. The more the rainfall event, the deeper the wetting front advanced.

Key words: tomato, saline-alkali stress, spermidine, nitrogen metabolism, mineral element.

李毅^1,2;邵明安². 间歇降雨和多场次降雨条件下黄土坡面土壤水分入渗特性[J]. 应用生态学报.

LI Yi^1,2;SHAO Ming-an² . Infiltration characteristics of soil water on loess slope land under intermittent and repetitive rainfall conditions. [J]. Chinese Journal of Applied Ecology.

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