不同紫花苜蓿品种在青藏高原高寒地区的适应性  

Suitability of several alfalfa varieties to alpine regions in the Qinghai-Tibetan Plateau

作　　者：姬万忠 赵旭[2] 刘慧霞[3] 王先之[2] 王丹丹[2] 藕洋[2] 冯成庸[2] 张晓黎[2] 

机构地区：[1]甘肃省天祝县草原工作站,甘肃天祝733200 [2]兰州大学草地农业科技学院,甘肃兰州730020 [3]西北民族大学生命科学与工程学院,甘肃兰州730030

出　　处：《草业科学》2012年第7期1137-1141,共5页Pratacultural Science

基　　金：国家行业公益项目(200903060);国家自然科学基金(30900173)

摘　　要：针对高寒地区豆科牧草稀缺的现状,采用连续4年田间试验,研究了5个紫花苜蓿(Medicago sativa)品种在高寒地区的适应性。结果表明,参试的5个紫花苜蓿品种物候期没有显著差异,所有品种均不能生产大量种子;以单株分枝数、株高和生物量为评价指标,威龙、大富豪、阿尔冈金3个品种的适应性明显优于苜蓿王和牧歌410的适应性;以营养价值为评价指标,大富豪和阿尔冈金的营养价值明显优于苜蓿王、大富豪和牧歌410;5个品种的越冬率后期差异不大。虽然参试5个紫花苜蓿品种均不能大量生产种子,但均能提供一定产量的营养体。综合考虑生产性能和营养价值,阿尔冈金和威龙在高寒地区具有较强的适应性,可以在高寒地区种植,实现优化高寒地区栽培草地质量,扩大优质蛋白饲料来源。A field experiment for four years was conducted to estimate the suitability of several alfalfa （Medicago sativa） varieties, including Millionaire, AmeriGraze401, Alfaking, WL-525HQ and Algon- guin, to alpine regions in the Qinghai-Tihetan Plateau. This study showed that the phenological phase of five varieties of alfalfa did not show a difference, and all varieties did not produce the mature seeds. The varieties named WL-525HQ, Millionaire, and Algonguin performed well when bianches per plant, height and biomass were used to estimate the suitability. On the basis of leaf-stem ratio, the forage quality of Millionaire and Algonguin was better than Alfaking, AmeriGraze401 and Millior.aire. The wintering rate of all varieties was not different at the experimental end. Combing the productive performance and forage quality, Algonguin and WL-525HQ were suitable for planting in the alpine regions with better resistance cold, which would optimize the structure of cultivation pasture in the alpine regions.

关 键 词：紫花苜蓿 品种 生物量 茎叶比 越冬率 物候期 

分 类 号：S541.9[农业科学—作物学]