不同基质配方对枫香容器苗质量的影响

分析以泥炭、珍珠岩、稻壳、锯屑为材料的15种不同基质配方的理化性状,以及对枫香苗质量和生理特征的影响,结果表明:15种不同基质配方的容重、最大含水量、pH、有机质含量、速效氮含量等理化性质差异显著;15种基质配方都符合轻型基质的要求,随着基质中泥炭含量的增加,基质的最大含水量和pH呈下降趋势,而含氮量呈上升趋势;15个不同基质配方枫香容器苗的苗高、地径、单株生物量、质量指数等指标差异显著,随着泥炭土比例的增加,苗木质量呈上升趋势。根据基质理化性状、容器苗质量及生产成本多目标进行综合评价和决策,认为容器苗的基质配方中5(泥炭(0.60)+珍珠岩(0.40))和7(泥炭(0.46)+珍珠岩(0.27)+稻壳(0.27))为最佳。

Influence of Substrate Composition on the Quality of Liquidambar formosana Container Seedlings

The physical and chemical properties of 15 substrates composed of peat,perlite,rice hulls and saw dust,and the influence of the substrates upon the quality and the physiological characteristics of Liquidambar formosana seedlings were evaluated.The results showed that there were significant differences in the physical and chemical properties of the 15 substrates including bulk density,field capacity,pH value,organic material content and effective nitrogen content,though all the 15 substrates met the requirements of light media.The field capacity and the pH value of the substrates dropped,while the N content increased along with the increment of peat content.There were significant differences in the plant height,basal diameter,biomass per plant,quality index(QI) among the container bred L.formosana seedlings with the 15 types of substrates.The seedling quality was improved with the increase of peat proportion in the substrates.The multi-objective comprehensive evaluation and policy making were conducted based on the physical and chemical properties of the substrates,the container bred seedling quality and the production cost,and the result showed that the best substrate compositions were No.5(peat 60%+ perlite 40%),and No.7(peat 46% + perlite 27% + rice husk 27%).