不同炼苗密度对桉树轻基质幼苗的影响  

Effects of Different Seedling Densities on the Cultivation and Hardening of Eucalypt Seedlings

作　　者：许宇星[1] 李超[1] 张国武[1] 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022

出　　处：《桉树科技》2015年第1期30-33,共4页Eucalypt Science & Technology

基　　金：林业公益性行业科研专项经费项目(201104003)

摘　　要：通过对5个月生4种不同炼苗密度的尾巨桉优良无性系DH32-29幼苗树高、地径及各器官生物量进行调查分析,结果表明:4种不同炼苗密度间苗高无显著差异;而地径差异达到极显著水平,并呈极显著负相关;不同炼苗密度单株间及各器官生物量均差异显著,单株生物量、叶片、茎干与根系的生物量均随炼苗密度增加而降低;考虑到空间利用率、通风保水性及疾病易感程度综合分析,炼苗密度以45株·盘-1效果最佳。Five-month-old seedlings of the hybrid eucalypt clone DH32-29 that had been grown under four different densities during seedling hardening were investigated. Growth, biomass of different organs and the condition of roots were analyzed in February 2014. Different seedling hardening densities had no significant effect on subsequent height growth but extremely negative impact on the basal diameter growth. Different seedling hardening densities had significant effects on subsequent biomass; the biomass of leaves, stems and roots decreased as the seedling hardening density increased. Meanwhile, considering the space utilization, ventilation, water retention and degree of disease susceptibility, a density of 45 plants/tray （for 96 cell trays） was the best choice for cultivation of quality hybrid eucalypt seedlings.

关 键 词：桉树 炼苗密度 器官 生物量 生长量 

分 类 号：S723.1[农业科学—林木遗传育种]