小型林窗对刺槐人工林林下草本和土壤养分的影响  

Effects of Small Forest Gaps on Understory Herbs and Soil Nutrients in Robinia pseudoacacia Plantations

作　　者：王弋戈 王飞 WANG Yi-ge;WANG fei(Northwest Institute of Forest Inventory and Planning,National Forestry and Grassland Administration,Xi'an,Shaanxi 710048)

机构地区：[1]国家林业和草原局西北调查规划院,陕西西安710048

出　　处：《陕西林业科技》2025年第2期12-15,25,共5页Shaanxi Forest Science and Technology

摘　　要：林窗是森林重要的空间结构之一,在植物生长、生物多样性保护和植被演替中发挥重要作用。本研究以刺槐人工林小型林窗(<100 m^(2))为研究对象,以相邻相同面积非林窗为对照,探究小型林窗对草本群落组成、养分特征及土壤养分的影响。研究表明:(1)刺槐人工林小型林窗与相邻非林窗草本物种组成、多样性和丰富度特征差异不显著,但群落β多样性具有一定的差异;(2)草本层碳磷比和土壤速效磷含量差异显著;(3)土壤全磷与草本群落特征显著负相关,而土壤碳氮比与草本养分显著正相关。以上结果表明,小型林窗仍然对草本群落和土壤养分具有显著影响。Forest gap is one of the important spatial structures of forests and plays an important role in plant growth,biodiversity conservation and vegetation succession.In this study,smallforest gaps(<100 m^(2))in Robinia pseudoacacia plantations were used as the research object,and the effects of gaps on herbaceous community composition,nutrient characteristics,and soil nutrient characteristics were explored with adjacent non-gaps of the same area as controls.The results showed that:(1)the species composition,diversity and richness of the herbaceous species composition,diversity and richness were not significantly different between the small gaps of the Robinia pseudoacacia plantation and the adjacent plantations with non-gap,but the community characteristics were somewhat different;(2)the ratio of carbon to phosphorus in the herb layer and soil available phosphorus content were significantly different;(3)soil total phosphorus and carbon to nitrogen ratio were positively correlated with herbaceous nutrients,respectively.The conclusion is that small gaps still have a significant impact on herbaceous communities and soil nutrients.

关 键 词：林窗 刺槐 草本群落 土壤养分 化学计量特征 

分 类 号：S718[农业科学—林学]