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首页> 外文期刊>Australian Forestry >Physical and nutritional characteristics and performance after planting of Eucalyptus globulus Labill. seedlings from ten nurseries: implications for seedling specifications
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Physical and nutritional characteristics and performance after planting of Eucalyptus globulus Labill. seedlings from ten nurseries: implications for seedling specifications

机译：种植桉树Labill后的生理和营养特性及性能。十个苗圃的幼苗：对幼苗规格的影响

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摘要

We measured the physical and nutritional characteristics of seedlings of Eucalyptus globulus Labill. (Tasmanian blue gum) in the nursery, and examined their effects on growth and mortality after planting in the field. Container-grown seedlings of widely varying specifications from ten nurseries were assessed immediately before planting. After planting, seedling height and collar diameter were recorded at monthly intervals for six months. Variation in seedling height, collar diameter, number of leafpairs, visually estimated root development or foliar concentrations of P, K, S, Ca, Mg, Na, Cl, Fe, Mn, Zn, Cu, B and Al did not account for observed height growth after planting. Seedling foliar N and (to a lesser extent) the size of the root ball largely explained the height growth observed after planting. The stems of seedlings with collar diameter <=2.2 mm were susceptible to breakage. From this work, we recommend that nurseries producing E. globulus seedlings note the following points if they aimfor optimal survival and performance of seedlings after planting on favourable sites: foliar N is a good indicator of potential early growth after planting, and concentrations of 15-20 g kg~(-1) are associated with best field performance; average seedling collar diameters >=2.3 mm seem to prevent breakage of the stem of seedlings of a height typically produced by nurseries (180-270 mm).
机译：我们测量了桉树Labill幼苗的物理和营养特性。 （塔斯马尼亚蓝胶）在苗圃中，并检查了它们对田间种植后生长和死亡率的影响。种植前立即评估了来自十个苗圃的容器生长的各种规格规格的幼苗。种植后，每六个月记录一次幼苗的高度和衣领直径。苗高，衣领直径，叶对数量，肉眼估计的根系发育或P，K，S，Ca，Mg，Na，Cl，Fe，Mn，Zn，Cu，B和Al的叶面浓度的变化无法解释种植后的高度增长。幼苗的叶面氮和（在较小程度上）根球的大小在很大程度上解释了种植后观察到的高度增长。衣领直径<= 2.2 mm的幼苗的茎容易断裂。从这项工作中，我们建议生产球孢E. globulus苗木的苗圃如果要在有利的地点种植后达到最佳存活和幼苗生长的性能，请注意以下几点：叶面氮是种植后潜在早期生长的良好指示，浓度为15- 20 g kg〜（-1）与最佳田间表现有关;平均苗领直径> = 2.3 mm似乎可以防止苗圃通常由苗圃（180-270 mm）产生的高度的茎干折断。

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