草业科学2025，Vol.42Issue(6)：1354-1364,11.DOI:10.11829/j.issn.1001-0629.2023-0697
促生复合菌剂添加对3种禾草混播生长及土壤特性的影响
Effects of composite growth-promoting microbial agent addition on the growth and soil properties of three mixed grasses
摘要
Abstract
In this study,we examined the effects of composite growth-promoting microbial agents on the growth and soil properties of a mixture of three grass,using 11 strains of effective plant growth-promoting rhizobacteria(PGPR),including those in the genera Bacillus,Pseudomonas,and Pseudarthrobacter.On the basis of the phosphorus solubilization,nitrogen fixation,plant growth hormone secretion,and other characteristics of the bacterial agents,we prepared six composite bacterial formulations(T1,T2,T3,T4,T5,and T6),which were added to a mixture of the three grasses Elymus nutans,Poa qinghaiensis,and Festuca sinensis,and measured growth indices of forage and stubble and selected chemical indices of soil.The results revealed that compared with the control treatment(equal amount of LB culture solution),all indicators showed different degrees of change,among which,the plant height of E.nutans,P.qinghaiensis.and F.sinensis increased by 1.49％to 15.07％,1.65％to 25.89％,and 6.36％to 11.13％,respectively,compared with the control;the total above-ground biomass increased by 4.38％to 13.60％;the pH declined by 0.03 to 0.11 units;the electrical conductivity increased by 2.31％to 14.02％;the available phosphorus increased by 12.07％to 27.80％;and ammonium nitrogen and nitrate nitrogen increased by 7.93％to 28.45％and 9.78％to 142.64％,respectively.Furthermore,the grey relational analysis ranking for the assessed formulations was T1＞T4＞T3＞T5＞T2＞T6＞control,thereby indicting that among these formulations,the composite microbial agent T1 had the best promotion effect,and thus potential for promotion and application.关键词
复合微生物菌剂/混播牧草/土壤特性/植被生长/灰色关联分析Key words
composite microbial agent/mixed-grass/soil characteristic/vegetation growth/gray relational analysis引用本文复制引用
李双雄,姚拓,柴加丽..促生复合菌剂添加对3种禾草混播生长及土壤特性的影响[J].草业科学,2025,42(6):1354-1364,11.基金项目
甘肃省林业和草原局"高寒草地退化植被恢复与土壤改良菌剂研发与示范"项目(GSAU-TSYF-2021-011) （GSAU-TSYF-2021-011）
