带状皆伐对岷山山系大熊猫廊道灌丛土壤养分的快速效应  

Rapid Effects of Strip Clear-cutting on Soil Nutrients of Giant Panda Corridor Shrubs in the Minshan Mountains

作　　者：李玲[1] 王玉杰 苟小林[1] 张远彬[2] 蒋豪[2] 余鳞 涂卫国[1] LI Ling;WANG Yujie;GOU Xiaolin;ZHANG Yuanbin;JIANG Hao;YU Lin;TU Weiguo(Sichuan Provincial Institute of Natural Resource Sciences,Chengdu 610015,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China;Administration Bureau of Wanglang National Nature Reserve,Mianyang 622550,China)

机构地区：[1]四川省自然资源科学研究院,四川成都610015 [2]中国科学院、水利部成都山地灾害与环境研究所,四川成都610041 [3]四川王朗国家级自然保护区管理局,四川平武622553

出　　处：《四川林业科技》2022年第2期31-37,共7页Journal of Sichuan Forestry Science and Technology

基　　金：四川省自然科学基金“大熊猫国家公园植物多样性保育关键技术研发与示范”(2018SZDZX0035);四川省自然科学基金“大熊猫国家公园栖息地质量提升与智能管理平台研发示范”(2021YFS0280);四川省自然科学基金“大熊猫廊道云杉人工林和冷箭竹林功能提升技术研究与示范”(2020YFS0023)。

摘　　要：以岷山山系大熊猫廊道康定柳灌丛为研究对象,进行了连续的带状皆伐和植被改造,分析了1年后灌丛皆伐带和保留带土壤养分和微生物碳氮特征。结果表明:皆伐改造后康定柳灌丛土壤养分条件和土壤微生物情况得到快速改善,与保留带相比,皆伐带表土层和亚表层中全氮提高了14.54%和29.50%,硝态氮增加了10.86%和23.36%,微生物氮升高51.31%和87.14%,微生物氮熵增加了43.12%和81.90%,表土层中微生物碳和微生物碳熵提高了39.32%和38.96%,亚表层中铵态氮提高了69.46%。皆伐后C/N显著降低,微生物活性增加,有机质的分解加快,表土层有机碳下降,可溶解养分可能向下层迁移和流失,可采取措施提高地表植被量,同时补偿土壤有机质的消耗。The Salix paraplesia shrubs in the giant panda corridor of the Minshan Mountains were chosen as the research object,and continuous strip clear-cutting and vegetation reconstruction were carried out.The characteristics of soil nutrients and microbial carbon and nitrogen contents in the clear-cutting zone and reserved zone of the shrubs were analyzed after 1 year.The results showed that the soil nutrient conditions and soil microbial conditions of the S.paraplesia shrubs were effectively improved after the clear-cutting reform.Compared with the reserved zone,the total nitrogen in the topsoil and subsoil of the clear-cutting zone increased by 14.54% and 29.50%,nitrate nitrogen increased by 10.86% and 23.36%,microbial nitrogen increased by 51.31%and 87.14%,microbial nitrogen entropy increased by43.12% and 81.90%,microbial carbon and microbial carbon entropy in the topsoil increased by 39.32%and 38.96%,and ammonium nitrogen in the subsoil increased by 69.46%.After clear cutting,the C/N ratio decreased significantly,the microbial activity increased,the decomposition of organic matter accelerated,the total organic carbon of topsoil decreased,and the soluble nutrients may migrate and deplete to the lower layer.Measures can be taken to improve the surface vegetation and compensate for the consumption of soil organic matter.

关 键 词：带状皆伐 大熊猫廊道 灌丛 土壤养分 土壤微生物 

分 类 号：S714.8[农业科学—林学]