南京农业大学学报2026，Vol.49Issue(3)：541-550,10.DOI:10.7685/jnau.202501008
地下滴灌玉米根系分布与吸水对灌水量的响应研究
Studies on root distribution and water uptake in subsurface drip-irrigated corn in response to irrigation water volume
摘要
Abstract
[Objectives]The paper aimed to investigate the soil moisture transport pattern of subsurface drip irrigated maize farmland and the response pattern of maize root distribution and water uptake to irrigation water quantity.[Methods]Five levels of subsurface drip irrigation were set up according to the evapotranspiration of corn(ETc)in the northern border:50%ETc(W1),75%ETc(W2),100%ETc(W3),125%ETc(W4)and 150%ETc(W5),and Hydrus-2d software was used to simulate soil moisture and root water absorption,and analyze soil moisture transport and root distribution in corn farmland under different irrigation water levels.The soil moisture transport and corn root distribution in corn farmland were analyzed under different irrigation amounts.[Results]With the increase of irrigation water,the overall trend of maize root length density and root surface area density was first increasing and then decreasing,and mostly reached the maximum value in W3.The soil water content gradually increased,and the average soil water content of the whole life span W1-W5 was 12.5%,16.4%,18.9%,21.1%and 23.0%,respectively.The root water uptake of each soil layer increased gradually,and the rate of root water uptake was 0.30,0.33,0.39,0.40 and 0.40 cm•d-1,respectively.[Conclusions]The R2 between the simulated and measured values of the Hydrus-2d model reached more than 0.86,and the RMSE ranged from 0.01 to 0.07,which was able to simulate effectively the water transport situation of sub-surface drip-irrigated maize farmland in the Northern Xinjiang region,and the 100%ETc irrigation treatment was the most suitable for the increase of root length and root surface area,and the proper treatment was the most suitable for the increase of root length and root surface area of maize.The 100%ETc irrigation treatment was the most suitable for the increase of root length and root surface area,the rate of root water uptake was positively correlated with the irrigation water amount,and the maize yield reached the highest of 17 882.15 kg•hm-2 at 100%ETc.关键词
玉米/地下滴灌/灌水量/Hydrus-2d模型/根系/吸水Key words
maize/subsurface drip irrigation/irrigation water volume/Hydrus-2d model/root/water uptake分类
农业科技引用本文复制引用
赵经华,袁莹莹,阿卜杜米提•马木提,杨庭瑞,马明杰..地下滴灌玉米根系分布与吸水对灌水量的响应研究[J].南京农业大学学报,2026,49(3):541-550,10.基金项目
"天山英才"培养计划"三农"骨干人才项目 （）
新疆维吾尔自治区"十四五"重大专项项目(2020A01003-4) （2020A01003-4）
