陕西洛南油松人工林立地质量评价  

Site Quality Evaluation of Pinus tabuliformis Plantations in Luonan,Shaanxi

作　　者：石梦婷 冯自茂 郝红科[1] 王迪海[1] 杨培华[1] 谢俊锋 孙卫鹏 张春霞[1] SHI Meng-ting;FENG Zi-mao;HAO Hong-ke;WANG Di-hai;YANG Pei-hua;XIE Jun-feng;SUN Wei-peng;ZHANG Chun-xia(College of Forestry,National Forestry and Grassland Bureau Pinus tabulaeformis Engineering Technology Research Center,Northwest A&F University,Yangling 712100,Shaanxi,China;Gucheng State-owned Forestry Farm of Luonan,Luonan 726107,Shaanxi,China)

机构地区：[1]西北农林科技大学国家林业和草原局油松工程技术研究中心/林学院,陕西杨陵712100 [2]洛南县古城国有林场,陕西洛南726107

出　　处：《西北林学院学报》2021年第6期127-133,共7页Journal of Northwest Forestry University

基　　金：国家重点研发计划项目(2017YFD060050104、2017YFC0504605)。

摘　　要：油松立地质量的划分与评价可以为其人工林的速生丰产培育及可持续经营提供科学依据。根据不同的林龄、海拔、坡向、坡度、坡位等因子,在洛南古城林场设置了63块20 m×30 m的油松人工林样地,调查了样地内的油松树高、胸径、冠幅等生长指标。通过数量化理论Ⅰ,对洛南地区油松人工林进行立地质量评价,并通过数量化理论Ⅱ建立了陕西洛南油松人工林立地质量类型判别模型。结果表明:1)洛南地区油松人工林树高、胸径随着林龄的增长有着明显的增加,其中油松在第10~20年时生长迅速,随后在第20~40年时生长速度较快。2)以海拔、坡向、坡位、坡度为主要立地因子将油松人工林划分为36个立地类型区。建立油松人工林立地质量评价表,研究区范围内有71.43%的油松人工林样地立地质量评价在中等及以上,结果说明在洛南地区阴坡、高海拔(≥970 m)且平缓坡度下较适宜油松的生长;洛南地区油松人工林种植区域内油松生长情况较好。3)以51组不同立地样本数据进行数量化理论Ⅱ判别分析,得到相应的判别系数矩阵,确定不同立地类型的样本中心点。用12组样本数据对该判别模型进行检验,正确率达91.67%,表明该模型具有良好的判别能力,可以用来判别预测洛南油松人工林的立地质量。Site classifications and evaluation of Pinus tabuliformis plantation could provide scientific basis for fast growing,high yield and sustainable management of P.tabuliformis.In the present study,we set up 63 plots of P.tabuliformis plantations with the size 20 m×30 m in Luonan from the aspects of age,altitude,aspect slope,and slope position.The growth indexes such as height,DBH and crown width of P.tabuliformis in the plots were investigated.Based on the theory of quantificationⅠ,the site quality evaluation model of P.tabuliformis plantation was established.The site quality type discrimination model of P.tabuliformis plantation based on the quantitative theoryⅡwas set up.The results showed that 1)the height and DBH of P.tabuliformis in Lonan area increased significantly with the tree age.The growth rate of P.tabuliformis was faster in the first 10-20 years than that in the 20-40 years.2)The P.tabuliformis plantation were divided into 36 site-type based on the elevation,slope direction,and slope position.In the study area,71.43%of the standard site quality of P.tabuliformis plantation was rated as medium or best.It would be the best for P.tabuliformis growing on shady slope,high altitude(≥970 m)and gentle slope.The results indicated that P.tabuliformis grew well in Luonan.3)In this study,51 groups of different site plots were used for quantitative theoryⅡdiscriminant analysis,the corresponding discriminant coefficient matrix was obtained,and the plot center of different site types was determined.Twelve groups of sample data were used to test the discriminant model,and the correct rate was 91.67%,suggesting that the model had good discriminant ability and could be used to discriminate and predict the site quality of P.tabuliformis plantation in Luonan.

关 键 词：油松 立地因子 生长指标 立地质量评价 数量化理论 

分 类 号：S791.254[农业科学—林木遗传育种]