适于苏北农田林网应用的落羽杉优树选择研究  

Plus tree selection of Taxodium distichum for the farmland shelterbelt network in Northern Jiangsu Plain

作　　者：王红玲[1] 施士争[1] 仲伟芹 黄瑞芳[1] Wang Hongling;Shi Shizheng;Zhong Weiqin;Huang Ruifang(Jiangsu Academy of Forestry,Nanjing 211153,China;Lyuao Nursery in Niushan Town,Donghai County,Lianyungang 222399,China)

机构地区：[1]江苏省林业科学研究院,江苏南京211153 [2]东海县牛山镇绿奥园艺苗木场,江苏连云港222399

出　　处：《江苏林业科技》2019年第5期22-27,31,共7页Journal of Jiangsu Forestry Science & Technology

基　　金：江苏省科技支撑(现代农业)项目“适于平原林网更新的泡桐和落羽杉优质材新品种选育”(BE2015371);中央财政林业科技推广示范资金“苏北杨树更新良种繁育及高效培育技术推广”(苏[2017]TG03号)

摘　　要：针对苏北平原农林业生产特点,以60株初选优树为对象,调查测定了与苏北平原农田林网功能密切相关树高、胸径、冠高、冠幅、中央冠幅/冠幅、水平方向树冠疏透度和垂直方向树冠疏透度等有关的7个性状。结果表明:各性状的变异系数为7.60%—23.41%,且各性状间存在显著或极显著的相关关系。采用主成分分析方法,阐明落羽杉树高、冠高、冠幅、垂直方向树冠疏透度是影响农田林网防护效益的最重要指标,进一步确定各性状的权重,其中冠高和垂直方向树冠疏透度的权重最大。经过对7个选择性状加权评分,筛选获得22株优树,入选率36.67%。Based on the production characteristics of agriculture and forestry in North Jiangsu Plain,such seven characters,all strongly associated with the function of farmland shelters network,as height of tree,diameter at breast height,crown height,crown breadth,middle crown breadth/crown breadth,crown porosity in the horizontal direction,and crown porosity in the vertical orientation,were determined and analyzed on 60 candidate trees in North Jiangsu Plain.The results indicated that the variable coefficients of the seven characters ranged from 7.60%to 23.41%,and there occurreda significant or extremely significant correlation between them.PCA(principal component analysis)results indicated that height of tree,crown height,crown breadth and crown porosity in the vertical orientation were more important than others concerning the function of farmland shelters network.After the weight of every character computed,and we got that crown height and crown porosity in the vertical orientation had higher weights.The weighted scores of the seven characters of the candidate trees were sequenced and 22 superior trees got selected,with the selected ratio of 36.67%.

关 键 词：落羽杉 选优 农田林网 苏北平原 

分 类 号：S722.33[农业科学—林木遗传育种] S791.34[农业科学—林学]