新生桑枝的枝条和叶片性状关系研究  

An Investigation on Twig and Leaf Trait Interrelationship of Newly Sprouted Mulberry Twigs

作　　者：王谢[1] 张建华[1] 唐甜[1] 刘海涛[1] 李廷平 田俊俊 向成华[3] 杨育林[3] 

机构地区：[1]四川省农业科学院土壤肥料研究所,成都610066 [2]四川农业大学林学院,成都611130 [3]四川省林业科学研究院,成都610081

出　　处：《蚕业科学》2017年第5期720-728,共9页ACTA SERICOLOGICA SINICA

基　　金：现代农业产业技术体系建设专项(No.CARS-22);四川省财政创新能力提升专项青年基金项目(No.2016QNJJ-015)

摘　　要：枝、叶的性状及二者间的关系是植物生态学研究的重要内容之一。采用雾化栽培技术控制环境变化,以桑品种农桑14号的2年生实生苗供试,研究遗传背景下新生桑枝的枝条和叶片性状之间的关系,结果发现:新生桑枝的粗细可以显著影响枝、叶性状,即随着桑枝粗细等级的增大,枝条的长度、基径、横截面面积和体积,桑叶的数量、叶面积和生物量都表现出逐渐增加的趋势;除了叶片均质量外,新生桑枝粗细对不同空间位置上的叶片数量、枝条生物量的影响具有显著差异;枝条的纵向生长和径向生长为异速生长关系,枝条上桑叶的数量与总叶面积为等速生长关系,枝条的总生物量与桑叶的总生物量为等速生长关系。上述研究结果暗示桑树枝、叶性状关系的遗传差异由新生桑枝粗细所表征,即新生桑枝粗细决定着枝条上的叶片数量和叶片的生物量。Twig trait, leaf trait and their interrelationship comprise an important part of plant ecological studies. Through controlling environmental changes via aeroponics, the twig and leaf trait interrelationship of newly sprouted mulberry twigs was investigated under genetic background using two-year old aseptic seedling of mulberry variety Nongsan 14 as mate- rial. It was found that size of newly sprouted mulberry twig could significantly affect twig and leaf traits. To be specific, the length, diameter, cross section area and volume of twig, and the number, area and biomass of leaves all increased gradually with twig size. Except the mean weight of leaves, size of newly sprouted mulberry twig had significantly different effect on number of leaves and biomass of twigs at different spatial locations. Longitudinal growth and radial growth of the twig had allometric relationship. Number of leaves and total area of leaves as well as total biomass of twig and total biomass of leaves had isometric relationships. These results suggest that the genetic difference in twig and leaf trait interrelationship of mul-berry twigs can be represented by size of newly sprouted mulberry twig, i. e. size of newly sprouted mulberry twig de- cides number and biomass of leaves on the twig.

关 键 词：桑树 枝条粗细 叶片数量 生物量 雾化栽培 

分 类 号：S888.2[农业科学—特种经济动物饲养]