TRINEXAPAC-ETHYL REDUCES PLANT HEIGHT AND SEED YIELD IN FORAGE SORGHUM

Revista Brasileira de Milho e Sorgo Pub Date : 2021-09-03 DOI:10.18512/rbms2021v20e1212

M. P. MINGOTE JULIO, P. Magalhães, Athos Rodrigues Soares Viana, Bruno Henrique MINGOTE JULIO, C. V. Santos, N. N. L. D. Parrella, Cícero Beserra de Menezes

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Abstract

Forage sorghum presents tall plants, what makes mechanicalseed harvesting a difficult task. Plant hormones can reduce plant height andfacilitate the harvesting. Thus, the objective of this study was to evaluatethe effect of the growth regulator trinexapac-ethyl on plant height and seedyield in forage sorghum. This research was carried out at Embrapa Maizeand Sorghum, in two seasons (2017 and 2018), in a randomized completeblock design, four replications and three varieties (BRS Ponta Negra, 1141574and 0947216) under application of Trinexapac-ethyl in two stages of the plantgrowth (V8, V12, V8 + V12). The characteristics evaluated were: plant height,seed yield and mass of 1000 seeds. The effect of the hormone was significantin both stages of growth, with a significant reduction in plant height. Thehormone applied twice at growth stages V8 + V12 had a greater effect inreducing plant height. However, the hormone reduced seed yield in the threevarieties, what implies the need for further studies comparing the advantageof plant height reduction and the loss in seed yield.

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三氟乙酸降低饲料高粱株高和种子产量

饲草高粱植株高大，这使得机械收割种子成为一项艰巨的任务。植物激素可以降低植株高度，有利于收获。因此，本研究的目的是评价生长调节剂trinexapac-ethyl对饲用高粱株高和种子产量的影响。本研究分2017年和2018年两个季节，采用随机完全区组设计，选取4个重复、3个品种(BRS Ponta Negra、1141574和0947216)，在植株生长的两个阶段(V8、V12、V8 + V12)施用Trinexapac-ethyl。评价的性状为:株高、种子产量和千粒重。激素的作用在两个生长阶段都是显著的，植株高度显著降低。在生育期V8 + V12施用两次激素对降低株高的效果更大。然而，激素降低了三个品种的种子产量，这意味着需要进一步的研究来比较株高降低的优势和种子产量的损失。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Revista Brasileira de Milho e Sorgo

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审稿时长

40 weeks