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首页> 外文期刊>Australian Journal of Crop Science >Modulation of the initial growth of Eucalyptus clones using paclobutrazol: when smaller is better
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Modulation of the initial growth of Eucalyptus clones using paclobutrazol: when smaller is better

机译：用多效唑调节桉树克隆的初始生长：越小越好

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Modulating the growth rates of Eucalyptus during the initial vegetative phase via plant growth regulators can improve field establishment. The objective of this study was to verify the impacts of different concentrations of paclobutrazol (PBZ) on two Eucalyptus hybrids during the initial phase of growth. Experiments were conducted in a greenhouse using an E. urophylla x E. grandis hybrid (AEC 1528) and a spontaneous hybrid of E. urophylla (144 AEC). Both clones were subjected to PBZ concentrations of 0, 50, 100, 150 and 200 ppm active ingredient (a.i.) applied to the soil. The treatments were part of a 2x5 factorial design, and they were arranged into randomized blocks and consisted of five replicates. Cuttings were transplanted into 20-L pots; each pot contained one cutting and was considered an experimental unit. At90 days after the application of PBZ, the growth and development of both Eucalyptus clones subjected to all concentrations were inhibited. The inhibition effects intensified as the concentration of PBZ increased until approximately 90 to146 ppm and increased the plant sturdiness ratio (H/D; S//diameter) due to the inhibition of height caused by PBZ. Clone AEC 144 performed better than clone AEC 1528with respect to dry mass accumulation, LN and leaf area. However, clone AEC 1528 was superior with respect to resource partitioning due to a lower S/R ratio, aiding survival underwater deficit conditions.
机译：通过植物生长调节剂调节植物生长初期的桉树生长速率可以改善田间环境。这项研究的目的是验证生长初期不同浓度的多效唑（PBZ）对两种桉树杂种的影响。在温室中使用尾叶大肠埃希菌×大叶埃希氏菌杂种（AEC 1528）和尾叶大肠埃希菌的自发杂种（144 AEC）进行实验。将两个克隆都施用到土壤上的PBZ浓度分别为0、50、100、150和200 ppm活性成分（a.i.）。这些处理是2x5因子设计的一部分，它们被安排成随机的块，由五个重复组成。将插移植到20升盆中;每个锅包含一个切口，被视为实验单位。 PBZ施用后90天，两种浓度的桉树克隆的生长和发育均受到抑制。随着PBZ浓度的增加直到大约90至146 ppm，抑制作用增强，由于PBZ引起的高度抑制，植物的坚固度（H / D; S //直径）增加。就干物质积累，LN和叶面积而言，克隆AEC 144的性能优于克隆AEC 1528。但是，由于较低的S / R比，克隆AEC 1528在资源分配方面更胜一筹，有助于水下生存条件的不足。

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