Agronomic Performance of Grain Sorghum Cultivated in Double Rows Space on Brazilian Cerrado

Abstract

<jats:p>ABSTRACT The spatial arrangement of plants in the cultivation area is a factor that directly influences grain yield, since the best arrangement can result in the greater use of water, light and nutrients. The aim of the study was to evaluate the agronomic performance of sorghum sown in double row spacing in the Brazilian Cerrado. For this purpose, field experiments were conducted in the 2018 and 2019 seasons in a complete block design with a factorial scheme of 2 x 5. There were four replications, using two row spacing: traditional (0.50 m) and double rows (0.25 m/0.75 m) and five plant populations: 120, 180 (recommended), 240, 300 and 360 thousand, plants ha-1. Morphological characteristics, yield components and grain yield were evaluated using joint data analysis for the two years of study. In 2018, due to lower rainfall during the crop season, the use of a double row arrangement presented grain yield lower than traditional spacing. On the other hand, in 2019, the year with the best water distribution, the yield was superior to that of 2018. The increase in plant population per hectare increased the yield of sorghum grains, with gains of up to 24% in relation to the recommended population of 180 thousand plants ha-1, demonstrated that the densification in this crop can be a promising technique as long as its cost/benefit is considered.</jats:p>

Cropping systems and soybean plant population in Brazilian Cerrado

“…Only population had significant effect in the following variables: number of secondary stems, total number of pods, number of pods in the main and secondary stem and insertion of the first pod height. The response in the 2014/15 season related only to the plant population, may be associated with the presence of a lower water regime (515 mm compared to 1015 mm in the 2013/14 season) in this period, a fact that increases the competition between plants by environment source (Carmo et al, 2020). 10.4 **; *; ns : Significant at 1% and 5% probability and not significant, respectively, by F test.…”

Interference of Increasing Densities of Sourgrass in Grain Sorghum

“…The negative effect of the sourgrass interference process in reducing the crop stand would hardly be reversed, even if management practices were adopted in the crop for this purpose. Sorghum has certain productive plasticity in the sense of compensating for failures in the crop stand without affecting yield; however, it has been shown in the literature that this behavior is valid for situations where there is a slight decrease in the recommended population (180,000 plants ha -1 ) (Carmo et al, 2020), a situation that is not consistent with the one observed in the The mass of 100 grains showed a reduction in the estimates according to the density increase of sourgrass plants (Figure 3B). This behavior can directly interfere with the final crop yield since the mass of 100 grains is one of the most important components of sorghum yield (Silva et al, 2015).…”

Produção De Sorgo Sacarino BRS 506 Em Função Do Manejo Da Adubação: Época De Corte Para Colheita E Irrigação

“…Um conhecimento completo do manejo mais eficiente desta planta deve ter como um dos fatores em destaque, principalmente para regiões de clima quente e seco como o semiárido brasileiro, o manejo hídrico (Carmo et al, 2020;Hassan et al, 2020). Apesar de ter ciência da resistência do sorgo sacarino à seca, ainda há carência de trabalhos que demostrem a magnitude do impacto que o estresse hídrico pode provocar no cultivo de sorgo, seja na produção de etanol, ou na produção de biomassa (Bell et al, 2020;Mohammed et al, 2020).…”