毛竹林和雷竹林根系结构特征研究  

Root Structure Characteristics of Phyllostachys edulis Forests and Phyllostachys praecox Forests

作　　者：吕惠飞 王灵玲 赵紫晴 孙晗靖 郑慧 LÜ Hui-fei;WANG Ling-ling;ZHAO Zi-qing;SUN Han-jing;ZHENG Hui(Jiande Forestry General Farm,Jiande 311604,Zhejiang China;Forestry and Water Conservancy Bureau of Fuyang District in Hangzhou,Hangzhou 311400,Zhejiang China;Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou 311400,Zhejiang China;Hangzhou Fuyang District Agricultural Technology Promotion Center,Hangzhou 311400,Zhejiang China)

机构地区：[1]浙江省建德市林业总场,浙江建德311604 [2]杭州市富阳区林业水利局,浙江杭州311400 [3]中国林业科学研究院亚热带林业研究所,浙江杭州311400 [4]杭州市富阳区农业技术推广中心,浙江杭州311400

出　　处：《亚热带植物科学》2024年第5期451-458,共8页Subtropical Plant Science

基　　金：浙江省科学技术厅领雁计划项目(2023C02035);国家自然科学基金项目(31670607、30840064)

摘　　要：通过探究毛竹Phyllostachys edulis和雷竹P. praecox竹林根系长度、体积、表面积及干质量等各项数量指标,阐明两类竹林根系结构特征及其差异,为竹类资源培育、竹林土壤管理以及竹林经济效益提升提供依据。采用根系挖掘法和根系扫描法,布设样地,对竹林根系在土壤中的分布特征进行研究。结果表明,毛竹林根系主要分布在0~40cm土层,根系表面积、体积、长度及干质量占全部根系比重均达80%以上。毛竹林和雷竹林内不同径级的根系长度和体积所占全部的比例均随着土层的加深呈逐渐降低趋势。毛竹林不同径级根系分布中,<1 mm根系长度占比最大(70.45%),>2 mm根系体积占比最大(78.73%)。雷竹林根系仅分布在0~40 cm土层,且土壤表层(0~20 cm)内根系体积、表面积及干质量占比均超60%,根系长度占总长度59.39%,不同径级分布中<1 mm径级根系长度占比最大(80.46%),但体积中占比最小(16.63%)。土壤0~40 cm土层内,3个径级根系长度占全部根系长度比重均表现为雷竹林>毛竹林,≤2 mm径级根系体积占比均表现为毛竹林<雷竹林,>2 mm径级中毛竹林>雷竹林。土壤层0~40 cm是竹林根系主要生长发育的活动层,亦是竹林土壤管理的重要层次,而毛竹林和雷竹林根系含量及结构存在明显差异,毛竹林相比雷竹林具有更庞大的根系结构。结合不同根系结构特征提出更符合竹种经营管理的措施是必要的。The study of differences in root structure characteristics between Phyllostachys edulis and P.praecox forests through measurements of length,volume,surface area,and dry weight of the root was carried out,which provided a basis for bamboo resource cultivation,soil management and enhancing the economic benefits of bamboo forests.The soil distribution characteristics of bamboo forest roots were investigated by using the methods of root digging scanning.P.edulis roots mainly distributed in the soil layer of 0-40 cm,and the root surface area,volume,length and dry mass accounted for more than 80%of the total root system.The proportions of root length and volume of different diameter classes in P.edulis and P.praecox forests showed the decreasing trend with the deepening of the soil layer.In the different diameter classes of P.edulis roots,roots with diameters<1 mm had the highest proportion of length(70.45%),whereas those with diameters>2 mm had the highest proportion of volume(78.73%).In P.praecox forest,the roots were distributed only in the soil layer of 0-40 cm,and the root volume,surface area,and dry weight accounted for more than 60%in the surface soil layer(0-20 cm).The root length accounted for 59.39%of the total length,and roots with diameters<1 mm had the highest proportion of length(80.46%)among different diameter classes,though they had the smallest proportion of volume(16.63%).In the soil layer of 0-40 cm,the proportion of root length in three diameter classes showed that P.praecox forest was greater than P.edulis forest.The proportion of roots with diameters≤2 mm showed that P.edulis forest was less than P.praecox forest.The proportion of roots with diameters>2 mm in P.edulis forest was greater than P.praecox forest.The soil layer of 0-40 cm is the main active layer for the growth of bamboo forest roots,and it is also the important level for soil management in bamboo forests.P.edulis and P.praecox differ significantly in root content and structure.P.edulis has the larger root structure compared to P.pra

关 键 词：毛竹 雷竹 根系 根系结构 

分 类 号：S795[农业科学—林木遗传育种]