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

Abstract

-The objective of this study was to evaluate the divergence of bromatological and fermentative characteristics of silages of 25 sorghum (Sorghum bicolor L. Moench) hybrids. The experimental design was completely randomized with 25 treatments and four replications. The mean values of pH differed with variation from 3.45 to 3.87 for hybrids 866005 and 870051, respectively, and the mean pH value was 3.66. The average percentage of lactic acid ranged from 2.90 to 7.43 dag/kg of dry matter (DM) in hybrids 870035 and 866005, respectively, with an average of 4.65 dag/kg DM.Through cluster analysis by the Tocher method and average Euclidean distance based on the fermentative characteristics, five groups were formed: one with 18 hybrids, another with four and three groups with one hybrid in each. In group three, there were the hybrids that showed the highest values of lactic acid. Hybrids 870025, 870035, 870081, 870095, 866034, and 870031 showed higher DM content and the hybrid BRS 610 had the lowest average compared with the others. Hybrids 1F305, BRS 610, Volumax, and XBS60329 had the lowest levels of non-fiber carbohydrates and higher neutral detergent fiber corrected for ash and protein. Despite the fermentative and bromatological divergences between hybrids, they are not a limiting factor to silage production.

Response of Forage Sorghum to Water Availability in a Typic Quartzipsamment

“…This may explain the different CP and ADF between the hybrids. The results of CP and ADF were similar to those found in the literature, with differences between the genetic materials, and between stem, leaves, and panicle (NEUMANN;RESTLE;ALVES FILHO, 2002;PEDREIRA et al, 2003;GOMES;PITOMBEIRA;NEIVA, 2006;SILVA et al, 2012).…”

Determination of Nutritional Quality and Aerobic Stability of Sorghum, Maize, and Sorghum-Maize Mixture Silages

“…a,b,c Values within a row with different superscripts differ significantly at P<0.05 DM: Dry Matter, g kg -1 ; CP: Crude Protein, g kg -1 DM; Ash, g kg -DM; NDF: Neutral Detergent Fiber, g kg -1 DM; ADF: Acid Detergent Fiber, g kg -1 DM; ADL: Acid Detergent Lignin, g kg -1 DM; Hcell: Hemicellulose, g kg -1 DM; Cell: Cellulose, g kg -1 DM; WSC: Water Soluble Carbohydrate, g kg -1 ; NH3-N: Ammonia Nitrogen, g kg -1 TN; LA: Lactic Acid, g kg Differences with respect to the CP and ash content among the silage groups were found significant (P<0.01). This result was expected because it was stated by some researchers in the earlier studies that the forage quality may strongly be affected by species, genotype, maturity at harvesting period, steam/leaf ratio, number of panicles (Cândido et al, 2002;Da Silva et al, 2012). The results were consistent with an adequate CP level for the functioning of ruminal microbiota (Pinho et al, 2015).…”

“…Sorghum (Sorghum bicolor L. Moench) is characterized by drought resistance and salinity tolerance, high water-soluble carbohydrates, and greater biomass yield than maize (Rocateli et al,2012;Pinho et al, 2015). Moreover, dual-purpose sorghum hybrids can reach 68% more dry matter (DM) yield than wild ones due to their number of panicles (Da Silva et al, 2012). The nutritional quality of sorghum is influenced by the genotype, specific size, life cycle, and breeding purpose is classified into four main groups according to their stem, number of panicles, and stem-leaf ratio:grain, forage, grazing, and broom (Neto et al, 2017;Perazzo et al, 2014).…”

“…The nutritional quality of sorghum is influenced by the genotype, specific size, life cycle, and breeding purpose is classified into four main groups according to their stem, number of panicles, and stem-leaf ratio:grain, forage, grazing, and broom (Neto et al, 2017;Perazzo et al, 2014). In addition to these factors, plant height, maturity stage at harvest, chopt length, and additives also influence sorghum's nutritional quality of ensiling (Zurak et al, 2018;Da Silva et al, 2012). It was stated in the literature that some sorghum varieties did not meet the nitrogen requirements of ruminants when fed without a concentratefree diet and resulted in insufficient total digestible nutrients (Kaewpila et al, 2021).…”