摘要
为明确苜蓿苗期耐酸能力及与秋眠等级的关系,采用水培法研究比较了秋眠等级分别为1、6、9的3个苜蓿秋眠标准对照品种在pH为3、3.54、5、6、7等6个pH水平下的苗期生长情况。通过对苜蓿的根长、株高、地上生物量、地下生物量、根体积及叶面积等指标的分析研究,结论如下:(1)强酸抑制苜蓿的生长,弱酸促进苜蓿的生长;pH值为4是苜蓿的耐酸极限值,水培条件下最适苜蓿生长的pH值为6。(2)不同秋眠等级苜蓿的耐酸顺序为FD9>FD6>FD1。
To clarify the relationship between acid tolerance and fall dormancy level of alfalfa in seedlings stage, seedlings growth conditions of three standard control alfalfa varieties of fall dormancy levels of 1, 6 and 9 were compared at pH 3, 3.5, 4, 5, 6 and 7 with hydroponic method. By analyzing the alfalfa root length, plant height, aboveground biomass, underground biomass, root volume and leaf area et al, the main conclusions were as follows： （1） strong acid inhibited the alfalfa＇s growth and weak acid promoted its growth; pH = 4 was alfalfa acid tolerance limit; pH ： 6 was the optimum for alfalfa growth under hydroponic conditions. （2）The sequence of acid tolerance of alfalfa of different dormancy levels was FD9~〉 FD6）〉 FD1.
出处
《中国草地学报》
CSCD
北大核心
2012年第4期37-41,共5页
Chinese Journal of Grassland
基金
国家科技支撑项目"优质多抗牧草新品种选育与良种繁育关键技术研究与示范(2011BAD17B01-05)"
国家农作物品种区域试验草品种试验项目"苜蓿标准对照品种筛选扩繁与秋眠生态区划"课题资助
关键词
苜蓿
耐酸性
秋眠级
水培
Alfalfa
Acid tolerance
Fall dormancy level
Hydroponics
