宁南黄土丘陵区不同植被下土壤入渗性能

应用生态学报

宁南黄土丘陵区不同植被下土壤入渗性能

杨永辉^1,3;赵世伟^1,2;雷廷武^1,4;刘汗⁴

¹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；²西北农林科技大学，陕西杨凌 712100；³河南省农业科学院植物营养与资源环境研究所，郑州 450002；⁴中国农业大学水利与土木工程学院现代精细农业系统综合研究重点实验室，北京 100083

收稿日期:2007-05-09 修回日期:1900-01-01 出版日期:2008-05-20 发布日期:2008-05-20

Soil infiltration capacity under different vegetations in southern Ningxia loess hilly region.

YANG Yong-hui^1,3;ZHAO Shi-wei^1,2; LEI Ting-wu^1,4; LIU Han⁴

¹State Key Laboratory of Soi Erosion and Dryland Farming on Loess Plat
eau, Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, Shaanxi, China; ²Northwest A-F University, Yangling 712100, Shaanxi, China;³Institute of Plant Nutritio
n, Agricultural Resources and Environmental Science, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;⁴Key Laboratory of Modern Precision Agriculture System Integration Research, College of Hydraulic and Civil Engineering, China Agricultural University, Beijing 100083, China

Received:2007-05-09 Revised:1900-01-01 Online:2008-05-20 Published:2008-05-20

摘要/Abstract

摘要： 应用新型的坡面人工模拟降雨条件下径流-入渗-产流测量仪器，野外测定了宁夏南部山区不同植被下不同雨强的土壤入渗性能，并分析了不同植被下土壤团聚体含量与土壤稳渗率的关系.结果表明，不同植被类型土壤入渗率与降雨历时之间的关系曲线均符合幂函数y=a+be^-cx(R²=0.9678～0.9969).随着雨强的增大，坡耕地的土壤稳渗率降低，而苜蓿地、天然草地及柠条林地则增大.20 mm·h^-1雨强下，土壤降雨入渗转化率依次为苜蓿地>坡耕地>天然草地>柠条林地；40和56 mm·h^-1雨强下，土壤降雨入渗转化率依次为苜蓿地>天然草地>坡耕地、柠条林地；土壤降雨入渗转化率随着雨强的增大而降低.坡耕地退耕后，随着植被的恢复，土壤>0.25 mm水稳性团聚体含量增加，土壤入渗性能提高.研究区植被的恢复与重建改善了土壤结构、提高了土壤入渗性能和坡面降雨利用潜力.

关键词: 浅埋滴灌, 水肥耦合, 辽西半干旱区, 春玉米, 产量

Abstract: A new apparatus for measuring the run off-on-out under simulated rainfall conditions was used to study the soil infiltration capacity under different rainfall intensities and vegetations in loess hilly region of southern Ningxia, with the relationships between soil waterstable aggregate content and soil stable infiltration rate under different vegetations analyzed. The results showed that the regression equations between rainfall duration and soil infiltration rate under different vegetations all followed y=a+be^-cx, with R² ranged from 0.9678 to 0.9969. With the increase of rainfall intensity, the soil stable infiltration rate on slope cropland decreased, while that on Medicago lupulina land, natural grassland, and Caragana korshinskii land increased. Under the rainfall intensity of 20 mm·h^-1, the rainfall infiltration translation rate (RITR) was decreased in the order ofM. lupulina land>slope cropland>natural grassland>C. korshinskii land; while under the rainfall intensity of 40 mm·h^-1 and 56 mm·h^-1, the RITR was in the sequence of M. lupulina land>natural grassland>slope cropland>C. korshinskii land, and decreased with increasing rainfall intensity. After the reversion of cropland to grassland and forest land, and with the increase of re-vegetation, the amount of >0.25 mm soil aggregates increased, and soil infiltration capacity improved. The re-vegetation in study area effectively improved soil structure and soil infiltration capacity, and enhanced the utilization potential of rainfall on slope.

Key words: spring maize, yield, water-fertilizer coupling, semi-arid region of western Liaoning Province, shallow-buried drip irrigation

杨永辉^1,3;赵世伟^1,2;雷廷武^1,4;刘汗⁴. 宁南黄土丘陵区不同植被下土壤入渗性能[J]. 应用生态学报.

YANG Yong-hui^1,3;ZHAO Shi-wei^1,2; LEI Ting-wu^1,4; LIU Han⁴. Soil infiltration capacity under different vegetations in southern Ningxia loess hilly region. [J]. Chinese Journal of Applied Ecology.

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