补播密度和施加根瘤菌对补播紫花苜蓿早期建植的影响  

Effects of Reseeding Rate and Rhizobia Application on Early Seedling Establishment of Reseeding Medicago sativa

作　　者：刘桂霞[1] 刘晓云[1] 肖猛[1] 李志强[2] 

机构地区：[1]河北大学生命科学学院,河北保定071002 [2]中国农业大学动物科技学院,北京100089

出　　处：《吉林农业科学》2014年第4期58-61,83,共5页Journal of　Jilin Agricultural Sciences

基　　金："十二五"农村领域国家科技计划课题"中东部地区优质紫花苜蓿高效生产利用关键技术集成与产业化示范"(2011BAD17B04);公益性行业(农业)科研专项"绿肥作物生产与利用技术集成研究及示范"(201103005)

摘　　要：补播豆科牧草,可有效恢复草地植被和有效改善草地植物群落的营养成分。试验研究了施加、不施加根瘤菌和3个补播密度(0.75 g·m-2、1.12 g·m-2、1.50 g·m-2)对退化天然草地补播紫花苜蓿中苜一号建植的影响。结果表明,施加根瘤菌提高了中苜一号的出苗率和存活率,显著提高了其株高、分枝数、叶面积、单株干重和有效根瘤数。补播密度只对株高和单位面积干重产生了显著影响,存活率和单株干重在中密度(1.12 g·m-2)时最高。试验认为补播紫花苜蓿的最适补播密度为1.12 g·m-2。建议在补播牧草恢复草地植被过程中,接种适合当地环境的根瘤菌和选择最适补播密度,以促进补播紫花苜蓿的成功建植和草地植被恢复。Reintroducing leguminous forage resulted in effective restoration of degraded grassland and improvement of nutritional composition of grassland community. The effects of two rhizobia applications and three seeding rates （0.75 g·m-2, 1.12 g·m-2, 1.50 g·m-2） on reseedingMedicago sativa Zhongmu no.1 were inves- tigated in this study. The results indicated rhizobia application promoted seedling emergence percentage and survivorship, and improved the seedling height, tillers, leaf area, dry weight and active rhizobia per seedling significantly. However, seeding rate only affected seedling height and dry weight of per square meters signifi- cantly, and the largest seedling survivorship and dry weight of per seedling occurred in middle seeding rate （1.12 g·m-2）. Our study suggested that 1.12 g·m-2 was the suitable reseeding rate of Zhongmu no.1 to degraded grassland. In order to obtain successful seedling establishment of reseeding Medicago sativa to the grassland restoration, it is necessary to use the local adaptive rhizobia and choose the optimum seeding rate.

关 键 词：补播密度 根瘤菌 中苜一号 种苗建植 

分 类 号：S551.9[农业科学—作物学]