利用生长调节剂和群体变异改造大豆植株结构

Willian Pelisser da Rosa, A. Caverzan, G. Chavarria
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摘要

大豆甘氨酸max (L.)增加的重要限制因素稳定。粮食产量是由于植物的过度生长。使用生长调节剂和种群调节对大豆的管理是必要的。本研究旨在评价乳醚作为生长调节剂和减少植物种群是否会影响大豆的结构并提高其生产效率。该研究是在2017-2018和2018-2019季节的野外条件下进行的。试验设计为完全随机区组,设5个处理和5个重复:T1(对照)、T2(物候期V3施用140 g a.i. ha−1乳醚)、T3(物候期V6施用140 g a.i. ha−1乳醚)、T4(植物种群比推荐值低20%)和T5(植物种群比推荐值低40%)。乳脂在V3期对株高、节数、分枝数、茎粗和节间距离均有影响。在V3阶段使用乳芬也增加了植物检疫产品的覆盖率和每平方厘米滴数。V3期施用乳芬对太阳辐射的截留量较高,产量最高。因此,使用乳芬作为生长调节剂可以提高大豆籽粒产量。减少植物种群对籽粒数和重量的影响最大。植株密度应按建议保持,以避免籽粒产量下降
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Modification of soybean plant architecture through growth regulators and population variation
An important limitation to increased soybean [Glycine max (L.) Merr.] grain yield is excessive plant growth. The use of growth regulators and population adjustment is imperative for the management of soybean. This study aimed to evaluate whether lactofen, used as a growth regulator, and a reduction in plant population affected the architecture of soybean and increased its production efficiency. The study was carried out under field conditions during the 2017–2018 and 2018–2019 seasons. The experimental design was in completely randomised blocks with five treatments and five replications: T1 (control), T2 (application of 140 g a.i. ha−1 of lactofen at phenological stage V3), T3 (application of 140 g a.i. ha−1 of lactofen at phenological stage V6), T4 (plant population 20% lower than recommended) and T5 (plant population 40% lower than recommended). The plant height, the number of nodes, the number of branches, stem diameter, and the internode distance were affected by lactofen application at stage V3. Lactofen use at stage V3 also increased the coverage percentage and the number of droplets per square centimetre of phytosanitary products. The interception of solar radiation was higher with lactofen application at stage V3 and that treatment provided the highest yield. Therefore, the use of lactofen as a growth regulator improves soybean grain yield. A reduction in plant population had the greatest effect on grain number and weight. Plant density should be maintained as recommended to avoid a decrease in grain yield
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