5株植物根际促生菌对紫花苜蓿生长和品质的影响  

Effects of 5 plant growth-promoting rhizobacteria on the growth and quality of Medicago sativa

作　　者：李昌宁 李政璇[2] 曹全熙 李建宏[1] 姚拓[1] 冉福 冯影 LI Chang-ning;LI Zheng-xuan;CAO Quan-xi;LI Jian-hong;YAO Tuo;RAN Fu;FENG Ying(College of Pratacultural Science,Gansu Agricultural University/Key Laboratory for Grassland Ecosystem of Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino U.S.Centers for Grazingland Ecosystem Sustainabilit;Department of Agriculture and Animal Husbandry of Gansu Provinc;Agricultural Technology Promotion Station of Hezheng Count;Linxia 731299,China)

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]甘肃省外资项目管理办公室,甘肃兰州730030 [3]和政县农业技术推广站,甘肃临夏731299

出　　处：《草原与草坪》2018年第3期29-34,共6页Grassland and Turf

基　　金：现代牧草产业技术体系(CARS-34);甘肃省农业生物技术研究与应用开发项目(GNSW-2016-36)资助

摘　　要：以前期研究中分离的5株植物根际促生菌(PGPR)为试验材料,采用盆栽试验的方式,将植物根际促生菌制剂接种到紫花苜蓿幼苗的土壤中,测定不同处理下苜蓿株高、茎粗等生长指标以及粗蛋白、粗脂肪和粗纤维等品质指标的变化,研究其对紫花苜蓿(Medicago sativa)生长和品质的影响。结果表明:选用的5株植物根际促生菌均能够有效促进紫花苜蓿生长,改善品质,但不同菌株的促生效果不同。促生菌株处理后,紫花苜蓿的株高、茎粗分别增加了11.2%~75.2%和4.1%~22.2%;粗蛋白、粗脂肪含量分别增加了6.0%~20.1%、3.8%~12.7%,酸性洗涤纤维(ADF)和中性洗涤纤维(NDF)含量分别降低了1.8%~3.8%、1.4%~4.4%。以菌株Gnyt1促生效果最佳,具有进一步开发利用的潜力。Five plant rhizosphere growth promoting bacteria（PGPR）isolated from previous research were used as materials to study their effects on alfalfa growth and quality by pot experiment,and the plant height,stem diameter,and contents of crude protein,ether extract and crude fiber were determined under different treatments,in order to provide a basis for utilizing PGPR bacterial fertilizer to obtain high quality and high yield alfalfa in arid and semiarid areas.The results showed that these 5 PGPR strains could promote alfalfa growth and improve quality effectively.However,the effect of different strains varied.The plant height and stem diameter of alfalfa were increased by 11.2%to 75.2%and 4.1%to 22.2%respectively,and the contents of crude protein and ether extract were increased by 6.0%to 20.1%and 3.8%to 12.7%respectively.The contents of acid detergent fiber（ADF）and neutral detergent fiber（NDF）were decreased by1.8%to 3.8%,1.4%to 4.4%respectively.The strain Gnyt1 performed the best effect and shown the potential for further development and utilization.

关 键 词：植物根际促生菌 紫花苜蓿 生长 品质 

分 类 号：S144[农业科学—肥料学] S54[农业科学—农业基础科学]