Agronomic divergence of sorghum hybrids for silage yield in the semiarid region of Paraiba

Abstract

-The objective of this study was to evaluate the agronomic divergence of 25 sorghum hybrids (Sorghum bicolor L. Moench) in the semiarid region of Paraiba. A randomized block design with three replications was used for evaluation of plant height (PH), total natural matter production (TNMP) and total dry matter production (TDMP) and the percentage of components of DM (panicle, leaf blade, stem and dead matter) of the following hybrids: 866005, 866019, 866033, 866034, 866035, 866036, 866037, 866040, 866041, 866042, 866043, 866044, 870025, 870031, 870035, 870041, 870051, 870067, 870081, 870085, 870095, 1F305, BRS 610, Volumax, and XBS60329. Hybrid 1F305, followed by hybrid 866034, presented the highest average PH. There was a range from 7.679 to 20.948 kg/ha (average of 13,799 kg/ha) for TDMP. Hybrids 1F305, BRS 610 and Volumax presented less potential, and hybrids 866,041 and 866,042 were the most productive. Based on cluster analysis and subjective cut in 50% of dissimilarity, it was possible to establish four hierarchical groups, from which two stood out concerning productive characteristics. The group formed by hybrids Volumax, BRS 610, and XBS60329 presented lower averages for yield and lower percentage of panicle. Hybrids 866041 and 866042 show a higher total dry matter production, with values around 20,000 kg/ha.

Divergence of the fermentative and bromatological characteristics of 25 sorghum hybrid silages

“…The low DM content of the hybrid BRS 610 can be explained by the higher percentage of total DM in the stem, as observed by Silva et al (2011). The higher values of DM in the silages may be associated with a high percentage of panicle, as observed by Silva et al (2011). Neumann et al (2002a) N-NH 3 -ammonia nitrogen; LA -lactic acid; AA -acetic acid; PA -propionic acid; BA -butyric acid; TN -total nitrogen; DM -dry matter; CV -coefficient of variation.…”

“…Hybrids 870025, 870035, 870081, 870095, 866034, and 870031 had higher (P<0.05) values of DM and the hybrid BRS 610 had the lowest (P<0.05) average in relation to the others. The low DM content of the hybrid BRS 610 can be explained by the higher percentage of total DM in the stem, as observed by Silva et al (2011). The higher values of DM in the silages may be associated with a high percentage of panicle, as observed by Silva et al (2011).…”

“…The sorghum forage is characterized by high natural matter (NM) production per hectare, with a lower number of panicles. The dual-purpose sorghum has high yields of NM and DM combined with greater participation of the panicle component, reaching 68% in DM (Silva et al, 2011).…”

Sorghum cultivars of different purposes silage

“…Forage sorghum has more sugar content than other purpose sorghum owing to higher stem than other parts of plant (SILVA et al, 2011a). In spite of being more productive, when ensiled losses may occur, since yeast can develop into the silo.…”

Produção e nutrientes minerais de milheto forrageiro e sorgo sudão adubado com soro de leite

“…Por sua vez, as pastagens representam a fonte de alimento muito importante na criação de ruminantes. Na região Nordeste do Brasil cerca de 70% de sua área estão incluídos no semiárido, caracterizado por condições climáticas que causam variação sazonal na produção de forragem (Silva et al, 2011). Desta forma, a suplementação volumosa tem-se baseado na utilização de recursos forrageiros adaptados à seca.…”