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Position: Home > Articles > Effect of Soil Water and Salt Dynamics on Temporal and Spatial Distribution Characteristics of Cotton Root under Mulch Drip Irrigation Water Saving Irrigation 2011 (1) 1-5+9

膜下滴灌下土壤水盐动态对棉花根系时空分布特征的影响

作  者：
刘磊;董新光;杨昕馨;杨鹏年
单  位：
新疆农业大学水利与土木工程学院新疆水利厅;新疆农业大学水利与土木工程学院
关键词：
膜下滴灌;根长密度;水盐动态
摘  要：
为讨论在膜滴灌条件下水分和盐分的运移对棉花根系时空分布的影响,选择淡水和咸水2个处理,在其3个不同生育期(蕾期、花铃期和吐絮期)采集距滴头不同距离和深度上的根系,并监测各剖面的水分、盐分及地上植株的农艺性状。对其根长密度与地上部分、水分和盐分的运移进行分析,研究表明根系对水分和盐分的胁迫表现明显,当土壤体积含水率在20%以上,电导率在2 000μS/cm以下时可以满足根系的正常生长发育,根系在这个范围内集中向水分高且盐分低的区域发育。
译  名：
Effect of Soil Water and Salt Dynamics on Temporal and Spatial Distribution Characteristics of Cotton Root under Mulch Drip Irrigation
作  者：
LIU Lei1,DONG Xin-guang2,YANG Xin-xin1,YANG Peng-nian1(1.College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University;Urumqi 830052,China;2.Xinjiang Water Resources Bureau,Urumqi 830000,Xinjiang,China)
关键词：
mulch drip irrigation;root length density;water salt dynamics
摘  要：
To discuss the effect of the movement of water-salt under the mulch drip irrigation condition on the temporal and spatial distribute of cotton root,two treatments irrigated with fresh water and saline water are chose,and cotton roots in different length and depth in different growing stage(the flower bud stage,flower boll stage and catkin stage) are collected,at the same time,the water content,salt content and agriculture of the cotton are monitored.The result of analysis of the relations among the root length density,the ground part,the water and salt content shows that the stress of water and salt plays a leading role on the root development,When the volumetric water content of soil is larger than 20% and the electric conductivity is smaller than 2 000 μs/cm,the root can grow and develop normally,and the root fastens to the concentrate filed with high rate of water and low rate of salt t in this scope.

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