草业学报2016，Vol.25Issue(4)：222-229,8.DOI:10.11686/cyxb2015287
农牧交错区旱作条件下苜蓿和冰草人工草地稳定性研究
Stability of alfalfa and wheatgrass pasture under dry farming in a pastoral agronomy area
摘要
Abstract
We conducted a 3-year field experiment to analyze the stability of alfalfa (Medicago sativa )and wheatgrass (Agropyron cristatum )pastures under dry farming in Duolun County,Inner Mongolia.The struc-tural and functional stability of pastures were studied by analyzing yield,competition,proportion of weeds, quality,and soil nutrient contents.The results showed that the yields of monocultures and a mixed culture were significantly higher than those of natural grassland,except in the year of establishment.The highest yields were in year 2,and the lowest yields were in year 1.Interspecific competition between alfalfa and wheat-grass in the mixed culture weakened the stability of the pasture because wheatgrass was more competitive than alfalfa.Weeds were controlled in the first and third year;therefore,it would be effective to conduct weeding in year 2.The quality of forage was significantly better in mixed cultures than in monocultures.The contents of soil organic carbon and nitrogen increased in the wheatgrass monoculture,providing adequate nutrition to sup-port pasture stability.关键词
旱作/豆禾混播/结构稳定性/功能稳定性Key words
dry farming/grass-legume mixtures/structural stability/functional stability引用本文复制引用
王博杰,唐海萍,何丽,林国辉,赵世杰,赵明旭..农牧交错区旱作条件下苜蓿和冰草人工草地稳定性研究[J].草业学报,2016,25(4):222-229,8.基金项目
“十二五”国家科技支撑项目课题（2011BAC07B01）和国家重点基础研究发展计划（973计划）（2014CB954303）资助。 （）
