水利学报2017，Vol.48Issue(4)：408-416,9.DOI:10.13243/j.cnki.slxb.20160733
河套灌区间作系统根系土壤水盐运移机理及间作优势研究
Research on the mechanism of water and salt transport in root soil and the advantage of intercropping system in Hetao irrigation district
摘要
Abstract
In order to study the issues on the mutual water use efficiency,the mechanism of soil salt transport,the contribution rate of underground part to intercropping advantage and the relative competitiveness of intercropping in spring wheat-spring maize intercropping system in Hetao irrigation area,a field experiment has been conducted on the base of root partition method.The results show that the intercropping wheat utilized 214.0～224.5m3/hm2 of water by the side of maize.Meanwhile,the intercropping maize utilized 108.1～125.2m3/hm2 of water by the side of wheat.The mean value of root soil EC in wheat and maize belts could reduce 0.2％ ～ 1.5％ and 2.7％ ～ 3.1％,respectively,by the superposition utilization effect of soil internal space under the intercropping mode.The water circulation is another factor that could reduce the mean value of root soil EC,with a decrease of 4.4％ ～ 4.5％ and 3.4％ ～ 5.2％ in the intercropping wheat and maize belts,respectively.The yield advantage of wheat-maize intercropping system in Hetao irrigation district is 27.7％ ～ 33.1％,with 20.4％ ～ 26.6％ attributed to the compensation effect of underground part,and 6.5％ ～ 7.2％ is attributed to the effect of aboveground part.The 10.0％ ～ 15.8％ of intercropping yield advantage results from superposition utilization of soil internal space by intercropping root,and the compensation effect of water and nutrient between the wheat and maize belts is 10.4％-10.8％.关键词
隔根/小麦/玉米间作/土壤盐分/间作优势Key words
root separation/wheat-maize intercropping/soil salt/intercropping advantages分类
农业科技引用本文复制引用
张作为,史海滨,李仙岳,闫建文..河套灌区间作系统根系土壤水盐运移机理及间作优势研究[J].水利学报,2017,48(4):408-416,9.基金项目
国家自然基金项目(51539005,51269015) （51539005,51269015）
国家科技支撑计划项目(2011BAD29B03) （2011BAD29B03）
