高寒牧区苜蓿盖土越冬能力试验  

Comparative Research on Overwintering of Alfalfa by Recovering Soil in Alpine Pasture Region

作　　者：李春喜[1] 叶润蓉[1] 周玉碧[1] 孙菁[1] 杜岩功[1] 张法伟[1] 彭立新[1] 

机构地区：[1]中国科学院西北高原生物研究所 中国科学院高原生物适应与进化重点实验室,青海西宁810001

出　　处：《青海农林科技》2014年第3期14-18,共5页Science and Technology of Qinghai Agriculture and Forestry

基　　金：国家科技支撑计划"干旱沟壑型小流域综合治理技术集成与示范课题"(2012BAC08B06);青海省作物分子育种重点实验室;青海省青藏高原特色生物资源研究重点实验室资助

摘　　要：为了探索苜蓿品种在海拔2700 m高寒牧区盖土越冬能力,开展了8个品种比较试验,结果表明:入冬时盖土5-10cm,来年成活率12.61%-42.29%,没有盖土(CK)成活率为0。种植第1年不能进入开花期,株高24.52cm-31.03cm,鲜草产量1875.2kg·hm-2-4156.4kg·hm-2;盖土越冬成活的苜蓿能进入开花期,株高46.87 cm-69.99 cm,鲜草产量6 101 kg·hm-2-20536 kg·hm-2,干草产量1082 kg·hm-2-5348 kg·hm-2,品种间差异极显著(P<0.01),其中德福32IQ、皇后和阿尔冈金3个品种表现突出。Eight kinds of alfalfas were comparative studied on the overwintering ability at the altitude of 2700 m. It was revealed that the survival ratio was about 12. 61 -42. 29% in the next year by recovering soil of 5 - 10 cm at the beginning of winter. However the survival ratio was 0 in the control plot（CK）. The alfalfa could not flower in the first year, and the plant height reached at 24.52 - 31.03 cm, and the yield of fresh grass was about 1875.2 -4156. 4 kg · hm^-2. But the survival alfalfa may enter the blossom period by recovering soil,and the plant height reached at 46.87 - 69. 99 cm, and the yield of fresh grass were measured at 6101 - 20536 kg · hm^-2, and the hay biomass was 1082 -5348 kg · hm^-2. Thus there was significant difference among the alfalfa varieties. Three kinds of alfalfa appeared outstanding performance ie. Medicago sativa cv. Defy 32IQ ,M. sativa cv. Queen and M. sativa cv. Algonquin.

关 键 词：苜蓿 盖土越冬 成活率 

分 类 号：S54[农业科学—作物学]