草业科学2024，Vol.41Issue(7)：1595-1605,11.DOI:10.11829/j.issn.1001-0629.2022-0983
氮磷配施微生物菌肥对退化高寒草甸植被特征和土壤理化性质的影响
N-P combined with microbial fertilizer application on vegetation characteristics and soil properties of degraded alpine meadows
摘要
Abstract
Fertilization is an important technique for the prevention and restoration of degraded alpine grassland.In this study,six fertilization treatments were set up,including no fertilization(CK),nitrogen and phosphorus(N-P)compound fertilizer 600 kg·ha-1(PM),microbial fertilizer 75 kg·ha-1(BM),N-P compound fertilizer 600 kg·ha-1+microbial fertilizer 75 kg·ha-1(P600BM),N-P compound fertilizer 450 kg·ha-1+microbial fertilizer 75 kg·ha-1(P450BM),and N-P compound fertilizer 300 kg·ha-1+microbial fertilizer 75 kg·ha-1(P300BM).Each treatment was replicated three times,for a total of 18 plots,to determine the restoration effect of N-P fertilizer combined with microbial fertilizer on degraded alpine meadows,and feasibility of fertilizer reduction after the application of microbial fertilizer,to screen the suitable fertilization scheme for the restoration of alpine meadows in the Qilian Mountains.The plant community characteristics and soil physicochemical properties of different fertilization treatments on the moderately degraded alpine meadows of the eastern Qilian Mountains were studied using the field community fertilization experimental method.The results showed that the fresh weight of the aboveground biomass under P600,P450,and P300 treatments was significantly increased(P＜0.05)compared with the CK.After fertilization,the dominance of Legume,Cyperaceae,and Gramineous plants increased significantly.The vegetation diversity index and richness of all fertilization treatments were improved compared with the CK,but the difference between PM and three N-P fertilizers combined with microbial fertilizer treatment was not significant.The vegetation diversity index and margalef index of all fertilization treatments were improved.Soil available N content at 0 to 10 cm under P450 was significantly higher than that in the CK and other treatments(P＜0.05).BM treatment had the highest soil organic matter content followed by P450.BM and P300 have minimal compactness at a 5 to 20 cm soil depth.Therefore,the application of N-P fertilizer and N-P fertilizer combined with microbial fertilizer had an obvious restoration effect on the vegetation of degraded alpine meadows,and the effect of N-P fertilizer was better than that of N-P fertilizer combined with microbial fertilizer.However,N-P fertilizer with microbial fertilizer significantly increased the main nutrient content of alpine meadow soil and improved the compactness of the soil.The effect N-P compound fertilizer 450 kg·ha-1+microbial fertilizer 75 kg·ha-1 was the best among the treatments.关键词
高寒草甸/草地退化/菌肥/氮磷复合肥/植被特征/土壤肥力/土壤理化性质Key words
alpine meadow/grassland degradation/microbial fertilizer/nitrogen and phosphorus compound fertilizer/vegetation characteristics/soil fertility/soil properties引用本文复制引用
达朝玲,李亚娟,胡蕊梅,鱼小军,徐长林,史志翯,徐晶晶,包红红..氮磷配施微生物菌肥对退化高寒草甸植被特征和土壤理化性质的影响[J].草业科学,2024,41(7):1595-1605,11.基金项目
甘肃省草原生态修复治理科技支撑项目 （）
甘肃省自然科学基金项目(20JR5RA036) （20JR5RA036）
