不同遮荫水平下大豆植株形态特征分析

Willian Daniel Reis Gontijo, É. Matsuo, A. B. Evaristo, P. Cecon, S. C. Ferreira, Marcely Araújo Martins Reis
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引用次数: 1

摘要

植物间或发生的遮荫会影响大豆的形态特征。因此,本研究旨在评价不同遮荫水平对大豆植株上胚轴长度、上胚轴直径和上胚轴高度的影响。实验是在温室里进行的。当植株达到V2发育阶段时,在试验一(秋季)测量上胚轴长度和直径;上胚轴长度、上胚轴直径和株高在春/夏试验II和夏试验III中均有显著差异。每个实验采用随机分组设计,在细分的地块中进行,重复4次。样地由4个遮阳层组成,子样地由8个常规品种组成。每个实验单元包括一株植物生长在一个3立方厘米的装满土壤和有机物的花盆中。试验评价的3个性状在互作品种x遮荫x播种季节均有显著影响。上胚轴长度随遮荫程度的增强而增加,与播种季节无关。遮荫程度和播种季节对上胚轴直径均有影响,遮荫程度越高,上胚轴直径越小。随着遮阳率的增加,株高增加。此外,品种在统计上形成了不同的类群。
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Analysis of morphological characters in soybean plants submitted to different levels of artificial shading
Morphological characters of soybean can be influenced by shading which are occasionally caused in plants. Thus, this study aimed to evaluate the effect of different shading levels on epicotyl length, epicotyl diameter and height of soybean plants. The experiments were conducted in a greenhouse. When the plants reached the V2 development stage, measurements were taken of epicotyl length and epicotyl diameter in experiment I (conducted in autumn); and epicotyl length, epicotyl diameter, and plant height in experiments II (spring/summer) and III (summer). Each experiments were conducted in a randomized block design, in subdivided plots, with four repetitions. The plots were composed of four shading levels and the subplots were composed of eight conventional cultivars. Each experimental unit consisted of one plant grown in a 3 dm³ pot filled with soil and organic matter. The three characters evaluated in the experiment presented significant effect for the interaction cultivar x shading x sowing seasons. Epicotyl length, independent of the sowing season, increased as the shading level intensified. Both the shading level and the sowing season influenced the diameter of the epicotyl, in a general way, reducing the diameter as the shading level increased. With increasing shading rate there was an increase in plant height. Moreover, the cultivars formed statistically distinct groups for the three morphological characters evaluated.
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