遮荫处理对不同品种橡胶树叶片解剖特征和生长的影响  

The Influence of Shade Treatment on Leaf Anatomical Characteristics and Growth of Different Rubber Variaties

作　　者：魏丽萍[1] 田耀华[1] 周会平[1] 岩香甩[1] 龚燕雄 原慧芳[1] WEI Liping;TIAN Yaohua;ZHOU Huiping;YAN Xiangshuai;GONG Yanxiong;YUAN Huifang(Yunnan Institute of Tropical Crops, Jinghong, Yunnan 666100, China)

机构地区：[1]云南省热带作物科学研究所,云南景洪666100

出　　处：《热带作物学报》2019年第1期45-53,共9页Chinese Journal of Tropical Crops

基　　金：云南省热带作物科技创新体系建设专项(No.RF2018-3);"云岭产业技术领军人才"培养计划(No.[2014]1782号);云南省重大科技专项计划(No.2016ZA009)

摘　　要：研究不同遮荫处理[无遮阳网遮荫光强(relative irradiance,RI)100%、一层遮阳网遮荫RI 50%、二层遮阳网遮荫RI 25%和三层遮阳网遮荫RI 5%]下,6个橡胶树品种(RRIM600、PR107、GT1、云研77-2、云研77-4和热研523)的叶片解剖结构特征(叶片厚度、主脉、上下表皮、栅栏组织、海绵组织)和相对生长速率,以了解橡胶树对光照的响应规律和适应能力。结果表明,不同光照强度对橡胶树的叶片解剖结构和生长均产生了相应程度的影响,但不同品种、不同指标的变化程度不尽一致,这表明6个橡胶树品种的响应程度和耐荫能力也不同。总的看来,RRIM600、PR107和云研77-4在25%以上的光强条件下均生长发育较好,说明其耐荫能力较强;而GT1、云研77-2和热研523在50%以上的较强光环境条件下生长更好,表明其具有一定耐荫性。In order to understand the response and adaptation to light of rubber tree (Hevea brasiliensis), six varieties of rubber seedlings (RRIM600, PR107, Reyan523, GT1, Yunyan77-2 and Yunyan77-4) grown under different shading treatments (natural light RI 100%, a layer of sun-shade net RI 50%, two layers of sun-shade net 25% and three layers of sun-shade net RI 5%) were studied by measuring the leaf anatomical structure characteristics and relative growth rate. The result showed that the shading treatment had obvious influences on rubber leaf anatomical structure and growth, but different variaties performed differently. RRIM600, PR107 and Yunyan77-4 performed well in the light environment above RI 25%, showing a relatively high adaptation to light, and GT1, Yunyan77-2 and Reyan523 had a certain extent of shade tolerance, but were more suitable to grow in the light environment above RI 50%.

关 键 词：橡胶树 叶片解剖特征 光照强度 适应性 相对生长速率 

分 类 号：S794.1[农业科学—林木遗传育种]