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Position: Home > Articles > An Experimental Study on Annual Change of Soil Surface Bulk Density of Dry Farmland Water Saving Irrigation 2018 (1) 19-23

旱作农田土壤表层容重年内变化特性的试验研究

作  者：
郭李娜;樊贵盛
单  位：
太原理工大学水利科学与工程学院
关键词：
旱作农田;表层容重;土壤含水率;试验研究
摘  要：
以黄土高原区旱作农田土壤为研究对象,基于年度跟踪试验,分析了农田表层土壤容重年内变化过程和特性,结合同步配套监测的试验区降雨量、气温及土壤含水率等资料,探究了玉米生长期内表层土壤容重变化机理。研究结果表明:玉米生长期内表层土壤容重表现为随时间增大的趋势;容重在生长期内变化过程可分为播种后容重陡增阶段、播种后容重缓增阶段、雨期容重陡增阶段、雨期容重波动阶段和容重缓降阶段;第一次大降雨后表层土壤容重达到最大值,湿陷变形过程基本完成;耕作层土壤深度范围内,10~20 cm土壤容重在3个阶段都处于最大,主汛期到来之前,0~2 cm土壤容重>2~10 cm土壤容重,主汛期0~2 cm土壤容重<2~10 cm土壤容重。研究结果可为农事作业管理、土壤入渗参数的预测与灌溉管理提供参数支撑。
译  名：
An Experimental Study on Annual Change of Soil Surface Bulk Density of Dry Farmland
作  者：
GUO Li-na;FAN Gui-sheng;College of Hydroscience and Engineering,Taiyuan University of Technology;
关键词：
dry farmland;;surface bulk density;;soil moisture content;;experimental research
摘  要：
With the dry farmland soil on the Loess Plateau as the research object,based on the annual tracking test,the variation and characteristics of cultivation layer bulk density within the year process are analyzed and the mechanism of soil bulk density in maize growth period is explored by combining with the datas of rainfall,temperature and soil moisture content,which were monitored simultaneously,of the test area.The results show that:as time goes by,surface soil bulk density is increasing in maize growth period;the process of density change in growth period can be divided into five stages:rapid growth stage after sowing,slow growth stage after sowing,sharply growth in rainy periods,fluctuation stage in rainy periods,gentle decline stage after harvest;the surface soil bulk density reaches the maximum after the rain drop and the process of collapsibility deformation has basically completed;soil bulk density of the 10~20 cm layer are the largest in the three stages in the deep range of cultivation layer;before the arrival of the main flood season,the soil bulk density of 0~2 cm layer is bigger than that of of 2~10 cm layer;while the soil bulk density of 0~2 cm layer is less than that of of 2~10 cm layer in the main flood season.The results can provide parameter support for the management of farming operations,the prediction of soil infiltration parameters and irrigation management.

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