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Position: Home > Articles > Influence of Irrigation for Alfalfa on Dynamic Change of Gray Calcium Soil Moisture and Salt Content Water Saving Irrigation 2011 (5) 20-22+26

灌溉紫花苜蓿对灰钙土水盐动态的影响

作  者：
李勇;何秀珍;宋乃平;刘孝勇
单  位：
西北退化生态系统恢复与重建省部共建教育部重点实验室;重庆工商大学数学与统计学院;西北退化生态系统恢复与重建教育部重点实验室
关键词：
灌溉;灰钙土;土壤含水量;土壤含盐量
摘  要：
发展适度灌溉的人工草地是荒漠草原地带生态恢复的重要途径。但是荒漠草原地带的灌溉水源十分紧张,灌溉方式往往比较粗放,灌溉水量、方式和时间结合不好往往会引起灰钙土土壤盐分向表层聚集而造成次生盐渍化。通过实地监测,对灌溉和未灌溉紫花苜蓿地灰钙土含水量和含盐量进行对比研究,评价荒漠草原灰钙土地带种植苜蓿的可行性。结果表明:在干旱灰钙土地带,每年2次的适度灌溉能满足苜蓿较好的生长需求,灌溉是有效的;灰钙土含水量和含盐量变化趋势大体一致,适度灌溉引起土壤含盐量在整个剖面有限的上升,不会引起次生盐渍化,对苜蓿生长不会造成影响。
译  名：
Influence of Irrigation for Alfalfa on Dynamic Change of Gray Calcium Soil Moisture and Salt Content
作  者：
LI Yong1,2,HE Xiu-zhen1,SONG Nai-ping1,2,LIU Xiao-yong1(1.Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China,Ministry of Education,Ningxia University,Yinchuan 750021,China;2.United Research Center for Exploitation of Ecology and Biological Resources in Western China,Ningxia University,Yinchuan 750021,China)
关键词：
irrigation;gray calcium soil;soil moisture;soil salt content
摘  要：
It is an important way for the ecology restoration in desert steppe zone to develop moderate irrigation in artificial pasture.But in desert steppe zone,the irrigation water resources is very limited and the irrigation mode is often extensive.If the irrigation water quantity,mode and time are not well combined,the salt it the gray calcium soil will gather to surface to cause secondary salinization.The comparative study on gray calcium soil moisture and salt content in irrigated and unirrigated alfalfa lands is conducted through field monitoring to evaluate the feasibility of planting alfalfa in gray calcium soil in desert steppe zone.The results shows that two times moderate irrigation per year can good meet the growth demand of alfalfa in gray calcium soil in desert steppe zone and the irrigation is effective.The variation tendency of gray calcium soil moisture and salt content is generally consistent,the moderate irrigation will cause limited rising of soil salt content in vertical section of soil,but will not cause secondary salinization and harmful influence on alfalfa growth.

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