农业工程学报2011，Vol.27Issue(1)：81-88,8.DOI:10.3969/j.issn.1002-6819.2011.01.012
半干旱区草粮轮作田土壤水分恢复效应
Restoration of soil water in alfalfa-grain crop rotation fields on semi-arid region
摘要
Abstract
Restoration of soil water in alfalfa-grain crop rotation fields was observed and simulated in the semi-arid region of southern Ningxia by the combination of field investigation and crop model simulation. Results showed that: a high soil desiccation rate and soil water restoration rate appeared both in the earlier stage and a low rate appeared in the later stage in the process of formation of desiccation layer during alfalfa growth period and soil water restoration during alfalfa-grain crop rotation period. It was difficult to restore soil water in the 8-10 m layer soil. Considering the sustainable soil water use of alfalfa-grain crop system, PPW rotation system (with the sequence of potato, potato,spring-wheat) was the optimum pattern to restore soil water on desiccated alfalfa grasslands with 6-8 years old, and alfalfa can be planted again after PPW rotation for 16-20 years. Results of this study can provide references for the using and restoration of soil water in alfalfa land on the semi-arid area of the Loess Plateau.关键词
轮作/水分恢复/半干旱区/苜蓿Key words
rotation/ water restoration/ semi-arid region/ alfalfa分类
农业科技引用本文复制引用
王学春,李军,方新宇,王美艳..半干旱区草粮轮作田土壤水分恢复效应[J].农业工程学报,2011,27(1):81-88,8.基金项目
国家自然科学基金项目(30771280) （30771280）
黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(10501-180) （10501-180）
农业公益性行业科研专项经费项目(200803028) （200803028）
