USE OF BENCHES WITH REFLECTIVE MATERIAL TO FAVOR PRODUCTION OF RUBBER TREE ROOTSTOCK SEEDLINGS

ABSTRACT Success in production of any perennial tree depends on the use of high-quality seedlings. This study aimed to evaluate cultivation benches with reflective material and protected environments for production of rubber tree rootstock seedlings. The experiments were conducted in two types of protected environments: 35% shading aluminized screen and 30% shading black screen. Cultivation benches with and without reflective material were tested inside the protected environments. A completely randomized design with 7 replications and 5 seedlings per plot was adopted for each environment, and the environments were compared by joint analysis. Solar radiation (global and photosynthetically active) was the most influencing micrometeorological factor on plant environment and plant growth differentiation. Regardless of the environment, the use of reflective material in cultivation bench had a positive effect on production of rubber rootstock seedling (clone GT1), providing seedlings with a robust root system and better quality. The use of reflective material also improved rubber tree rootstock seedlings (clone GT1) grown in the black screen environment.摘要：任何多年生林木的育苗成功与否，均取决于优质种苗的应用。本研究旨在评估搭载反光材料的栽培台与不同保护地环境对橡胶树砧木种苗繁育的效果。试验设置两类保护地环境：遮光率35%的镀铝遮阳网环境，以及遮光率30%的黑色遮阳网环境。在各保护地环境内，分别测试了搭载反光材料与未搭载反光材料的栽培台。各试验环境均采用完全随机设计，设置7次重复，每小区定植5株种苗，并通过联合分析对不同环境进行对比评价。太阳辐射（含总太阳辐射与光合有效辐射（photosynthetically active radiation））是影响植株生长环境及生长分化的最为显著的微气象因子。无论采用何种保护地环境，在栽培台使用反光材料均对橡胶树砧木种苗（GT1无性系）的繁育具有积极作用，可培育出根系健壮、品质更优的种苗。此外，在黑色遮阳网环境下培育的橡胶树砧木种苗（GT1无性系），其生长品质也因反光材料的使用得到了提升。