区域尺度桢楠人工林土壤养分特征  

Soil Nutrient Characteristics of Phoebe zhennan Plantation at Regional Scale

作　　者：唐婕 林自芳 王晓琴[3] 程一伦 彭建[3] 王芳[4] 杨汉波 辜云杰[3] TANG Jie;LIN Zifang;WANG Xiaoqin;CHENG Yilun;PENG Jian;WANG Fang;YANG Hanbo;GU Yunjie(Neijiang Afforestation Station,Neijiang 641005,China;Muchuan Forest Bureau,Muchuan 614500,China;Sichuan Academy of Forestry,Chengdu 311400,China;Sichuan Provincial Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River&National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River&Rainy Area of West China Plantation Ecosystem Permanent Scientific Research Base,Institute of Ecology&Forestry,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]内江市造林站,四川内江641005 [2]沐川县林业局,四川沐川614500 [3]四川省林业科学研究院,四川成都610083 [4]长江上游林业生态工程四川省重点实验室,长江上游森林资源保育与生态安全国家林业和草原局重点实验室,华西雨屏区人工林生态系统研究长期科研基地,四川农业大学,生态林业研究所,四川成都611130

出　　处：《四川林业科技》2021年第4期26-34,共9页Journal of Sichuan Forestry Science and Technology

基　　金：四川省重点研发项目(2021YFYZ0032);四川省财政专项项目:桢楠人工林养分循环特征研究。

摘　　要：分析区域、龄组对桢楠人工林土壤性质的影响,从土壤养分探讨区域尺度上桢楠人工林的土壤养分特征,为桢楠人工林的可持续经营和立地质量精准评价提供理论依据。选择四川省不同区域、林龄桢楠人工林为研究对象,采用S形取样法对不同土层(0~20 cm、20~40 cm)进行养分试验研究,一般线性模型、相关分析、主成分分析等多元统计方法相结合,探究桢楠人工林土壤养分因子在不同区域、不同龄组间的差异性和相关性。结果显示,四川不同地区桢楠人工林土壤在全氮、全磷、全钾、钙和镁5项指标上差异显著(P<0.05),有机碳差异不显著。所有养分因子在不同龄组之间的差异不显著。随着土层深度的增加,各养分含量整体上呈递减趋势,具有表聚性。仅有机碳和全氮呈显著的正相关,其余各养分指标间相关性均不显著。基于主成分分析的桢楠人工林土壤养分综合得分前三位分别为雅安市荥经县、乐山市峨眉山以及雅安市雨城区。因此,要根据不同区域土壤养分特征适地进行桢楠人工林可持续经营。To analyze the effects of regions and age groups on soil properties of Phoebe zhennan plantation,the soil characteristics of P.zhennan plantation on regional scale were discussed from soil nutrients perspective,which could provide a basis for the accurate evaluation of sustainable forest management and site quality.Different regions and age groups of P.zhennan plantation in Sichuan province were selected as the research objects.The soil samples were collected by S-shaped sampling method and the nutrients were analyzed at two soil depths(0—20 cm and 20—40 cm).The general linear model,correlation analysis,principle components and other multivariate statistical methods were combined to explore the differences and relationships of soil nutrient factors of P.zhennan plantation in different regions and different age groups.The results showed that there were significantly differences of soil total nitrogen,total phosphorus,total potassium,calcium and magnesium contents in P.zhennan plantation in different areas of Sichuan(P<0.05),and there was no significantly difference in soil organic carbon.There was no significant difference in all nutrient factors among different age groups.With the increase of soil depth,the nutrient content represented a decreasing trend,and showed surface accumulation.There was a positive correlation between organic carbon and total nitrogen content,while other nutrient properties had no significant correlation.According to the results of principle components analysis,the top three comprehensive scores of soil nutrient of P.zhennan plantation were Yingjing county of Ya'an city,E’meishan of Leshan city,and Yucheng district of Ya'an city,respectively,Therefore,sustainable management of P.zhennan plantation should be carried out base on the characteristics of soil nutrients in different regions.

关 键 词：桢楠 人工林 区域 土壤养分 多元统计 

分 类 号：S714[农业科学—林学]