赤桉苗木抗旱性研究

Drought Resistance of Eucalyptus camaldulensis Seedling

采用不同施肥方法、不同激素种类及浓度,在进行水分调控的条件下,研究了赤桉1 a生苗木生长形态、生物量等方面的差异。并通过相关性分析,选择苗木总生物量、I级侧根数、根系占总生物量的百分比及高径比4个指标,利用模糊数学隶属(反隶属)函数进行综合评价,从中筛选出赤桉苗木的最佳抗旱性育苗技术。结果表明,影响赤桉抗旱性的主导因素是水分胁迫,最佳的育苗组合为"5 d浇水—直线施肥—矮壮素100×10-6"。

Using different fertilizing methods,different types and concentrations of hormones,and watering controls,the growth indices and biomass of the one-year-old seedlings have been studied.And four index selected by the correlation analysis （total biomass,the number of primary lateral root,the biomass percentage of root,and the ratio of height-diameter）,have been evaluated by fuzzy mathematics （Anti attached） function,then the best drought-resistance seedling nursery technology was selected.The results showed that the key indicators impacted drought resistance on E.camaldulensis seedlings was water stress,and the best combination of seedling nursery was A2B2CID4,named as ＂five days watering-straight fertilization-CCC-100ppm＂.