不同施肥模式對(duì)甘南亞高山草甸植被群落和土壤的影響

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中圖分類號(hào)：S812 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-0435（2025）07-2184-14

引用格式：代蓉，劉蘇興，王正文，等.不同施肥模式對(duì)甘南亞高山草甸植被群落和土壤的影響[J].草地學(xué)報(bào)，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為我國(guó)重要的草牧業(yè)生產(chǎn)基地1，是我國(guó)主要牧區(qū)之一，其東部的亞高山草甸是重要的綠色生態(tài)屏障及黃河上游水源涵養(yǎng)關(guān)鍵區(qū)。（剩余20211字）