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Keywords = sweet potato vine silage

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12 pages, 265 KiB  
Article
Feed Quality and Feeding Level Effects on Faecal Composition in East African Cattle Farming Systems
by Asep I. M. Ali, Shimels E. Wassie, Rainer Georg Joergensen, Daniel Korir, John P. Goopy, Klaus Butterbach-Bahl, Lutz Merbold, Uta Dickhoefer and Eva Schlecht
Animals 2021, 11(2), 564; https://doi.org/10.3390/ani11020564 - 22 Feb 2021
Cited by 11 | Viewed by 3509
Abstract
Effects of feeding levels below maintenance requirements of metabolizable energy (MER) and of feed supplementation on fecal nutrient and microbial C concentrations were evaluated. In experiment 1, Rhodes grass hay only was offered to Boran steers at 80%, 60%, and 40% of individual [...] Read more.
Effects of feeding levels below maintenance requirements of metabolizable energy (MER) and of feed supplementation on fecal nutrient and microbial C concentrations were evaluated. In experiment 1, Rhodes grass hay only was offered to Boran steers at 80%, 60%, and 40% of individual MER, while steers at 100% MER additionally received a concentrated mixture. This reduction in MER decreased N, increased fungal C but did not affect bacterial C concentrations in feces. In experiment 2, Holstein × Boran heifers were offered a poor-quality roughage diet without supplement, with sweet potato vine silage or with a urea-molasses block. These two supplements did not affect the fecal chemical composition or fungal C but increased bacterial C concentrations in feces. Across all data, the fungal C/bacterial C ratio was positively related to N and negatively to neutral detergent fiber concentrations in feces, indicating diet-induced shifts in the fecal microbial community. Full article
(This article belongs to the Section Cattle)
17 pages, 492 KiB  
Article
Supplementing Tropical Cattle for Improved Nutrient Utilization and Reduced Enteric Methane Emissions
by Asep I. M. Ali, Shimels E. Wassie, Daniel Korir, Lutz Merbold, John P. Goopy, Klaus Butterbach-Bahl, Uta Dickhoefer and Eva Schlecht
Animals 2019, 9(5), 210; https://doi.org/10.3390/ani9050210 - 30 Apr 2019
Cited by 32 | Viewed by 6012
Abstract
Given their high nitrogen (N) concentration and low costs, sweet potato vine silage (SPVS) and urea-molasses blocks (UMB) are recommended supplements for tropical regions; therefore, they were investigated in this study. Six heifers were allocated to three diets: the roughage diet (R) consisted [...] Read more.
Given their high nitrogen (N) concentration and low costs, sweet potato vine silage (SPVS) and urea-molasses blocks (UMB) are recommended supplements for tropical regions; therefore, they were investigated in this study. Six heifers were allocated to three diets: the roughage diet (R) consisted of wheat straw (0.61) and Rhodes grass hay (0.39; on dry matter (DM) basis); R + SPVS combined R (0.81) and SPVS (0.19); and with R + UMB animals had access to UMB. During two experimental periods, feed intake, feces and urine excretion, digesta passage, and rumen microbial protein synthesis were determined during seven days and methane emissions during three days. There was no treatment effect (p > 0.05) on DM and N intake. Apparent DM digestibility of R + SPVS (510 g/kg) was higher (p < 0.05) than of R (474 g/kg). Digesta passage and duodenal microbial N flow were similar for all diets (p > 0.05), while N retention was highest with R + SPVS (p > 0.05). Methane emissions per unit of digested feed (g CH4/kg dDM) were lower (p < 0.05) for R + SPVS (55.2) than for R (64.7). Hence, SPVS supplementation to poor–quality roughage has the potential to increase diet digestibility and N retention while reducing CH4 emissions. Full article
(This article belongs to the Collection Use of Agricultural By-Products in Animal Feeding)
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