不同施肥模式对甘南亚高山草甸植被群落和土壤的影响

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中图分类号：S812 文献标识码：A 文章编号：1007-0435（2025）07-2184-14

引用格式：代蓉，刘苏兴，王正文，等.不同施肥模式对甘南亚高山草甸植被群落和土壤的影响[J].草地学报，2025，33（7）：2184—2197 ， ， ，et al.Effcts of Different Fertilization Modes on Vegetation and Soilof AlpineMeadow in Gannan Prefecture[J].ActaAgrestia Sinica，2O25，33（7） ：2l84-2197

Effects of Different Fertilization Modes on Vegetation and Soil of Alpine Meadow in Gannan Prefecture

DAI Rong，LIU Su-xing，WANG Zheng-wen， ZHOU Xia-yan，BAI Ya-jun， CAO Wen-xia* （CollegeofPrataculture，GansuAgriculturalUniversity/KeyLaboratoryofPratacultureEcosystemofMinistryofEducation/ China-USResearchCenterforSustainableevelopmentofrassandAnimalHusbandry，LanzhouansuProvince7oCina）

Abstract：In order to explore the effects of thecombinedapplication of organicand inorganic fertilizers on the productivity，vegetation community and soil of the mountain meadow on the Qinghai-Tibet Plateau，this study selected the subalpine meadow in Gannan Prefecture as the research object and adopted a random block design. A total of 19 treatments 16 fertilization gradients （F1-F6）×3 combined application modes[single organic fertilizer（On）， 80% organic fertilizer +20% inorganic fertilizer（OnCL）， 60% organic fertilizer +40% inorganic fertilizer （ ΔOnCH）+no fertilization treatment （CK）]丨were set up to systematically evaluate the effects of different fertilization gradients and combined application modes on vegetation productivity，population structure and soil fertility. The results showed that fertilization significantly increased above-ground biomass （ .P<0.05 ）by 84% to 292% ， but had no significant effect on community diversity. The contents of soil alkali-hydrolytic nitro gen，available phosphorus，organic matter and soil urease activity were significantly increased by 3%-16% ， 4% 1 54% ， 13%-23% and 7%-28% ，respectively ⋅P<0.05） .The activity of alkaline phosphatase increased first and then decreased with the increase offertilizer application.Principal component analysis showed that OnCL in F4 （ N135kg⋅hm-2 ， P2O567.5kg⋅hm-2 ， 80% organic fertilizer +20% fertilizer） was the optimal treatment， which provided reference for the soil fertility improvement and restoration ofdegraded subalpine meadows. Key words： Subalpine meadow; Combined application of organic fertilizer and inorganic fertilizer; Vegetation community characteristics;Soil enzyme activity;Soil fertility

青藏高原天然草地作为我国重要的草牧业生产基地1，是我国主要牧区之一，其东部的亚高山草甸是重要的绿色生态屏障及黄河上游水源涵养关键区。（剩余20211字）