灌水、覆盖对阿尔冈金苜蓿越冬率及田间土壤温湿度的影响  

Effects of Cover and Irrigation on Winter Surviving Rate,Soil Temperature and Soil Moisture of Algonquin Alfalfa

作　　者：于辉 刘惠青 王静[3] 

机构地区：[1]鄂尔多斯生态环境职业学院,内蒙古鄂尔多斯017010 [2]鄂尔多斯市草原监督管理局,内蒙古鄂尔多斯017010 [3]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《中国草地学报》2015年第6期107-111,共5页Chinese Journal of Grassland

基　　金：国家自然科学基金项目(31360112)

摘　　要：通过比较阿尔冈金苜蓿在2013年和2014年的越冬率,以及田间土壤温度、土壤体积含水量在不同灌水时间和覆盖处理下的差异,分析不同处理对阿尔冈金苜蓿越冬性能的影响。结果表明,越冬率最高的是封冻前灌水处理的阿尔冈金苜蓿。封冻前至解冻前覆盖处理的阿尔冈金苜蓿田在封冻期的土壤温度极显著高于其他处理。解冻后的土壤体积含水量与阿尔冈金苜蓿越冬率呈极显著正相关。土壤封冻前灌水处理对阿尔冈金苜蓿的越冬能力起到了最主要和最直接的作用。The regression equation was established by comparing the winter surviving rate,soil temperature and soil moisture of Algonquin-alfalfa（Medicago sativa L.cv.Algonquin）under different irrigation time and cover time in 2013 and 2014to analysis the overwintering ability.The results showed that winter surviving rate of Algonquin-alfalfa was the highest after the before-freeze irrigation,the soil temperature was significantly higher in the freezing time after the cover from freeze to thawing than the other treatments.Soil volumetric moisture content was very significantly higher after the before-freeze irrigation than the other treatments.There was a significantly positive correlation between soil volumetric moisture content and winter surviving rate after thawing.The before-freeze irrigation played a key and direct role in overwintering ability of Algonquin alfalfa.

关 键 词：阿尔冈金苜蓿 灌水 覆盖 越冬率 土壤温度 土壤湿度 

分 类 号：S541[农业科学—作物学]