Appraisal of cowpea (Vigna unguiculata) hay as a replacement for noug seed (Guizotia abissynica) cake in the ration of Gumuz lambs in Ethiopia

Abstract

Background:The objective of this study was to evaluate the replacement value of cowpea (Vigna unguiculata) hay for noug seed (Guizotia abissynica) cake on dry matter (DM) and nutrient intake, nutrient digestibility, body weight change, carcass characteristics and economic feasibility of the feeding regime of Gumuz lambs. Methods:The study was conducted using 25 yearling intact male lambs with an initial body weight of 18.26 ± 0.63 kg (mean ± SD).The lambs were assigned into five treatments: (T1) 272.3 g noug seed cake (NSC); (T2) 200.73 g NSC + 105.55 g cowpea Sewinet variety hay (CSH); (T3) 134.3 g NSC + 211.86 g CSH; (T4) 66.31 g NSC + 313.79 g CSH and (T5) 417.98 g CSH on DM basis. The experiment was conducted using a randomized complete block design (RCBD), and lambs were blocked based on their initial body weight. The feeding trial was conducted for 90 days followed by 7 days of digestibility trial. Natural pasture hay was treated with molasses solution for improvement of palatability and digestibility and offered for all experimental lambs in ad libitum. Results:The crude protein (CP) contents of natural pasture hay (NPH), CSH and NSC were 4.99, 18.31 and 36.5%, respectively. The total DM intakes of lambs (P < 0.05) increased at higher levels of CSH supplementation. The CP intake decreased with increasing levels of CSH supplementation. Digestibility of DM, organic matter (OM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) was improved by a higher level of CSH supplementation but CP digestibility was not affected by supplementation of CSH. The average daily gain (ADG) showed significant difference (P < 0.05) among treatments. Similarly, the feed conversion efficiency (FCE) was significantly different (P < 0.05) among treatments; higher FCE was recorded at T1 but lower was at T3 and T4. The hot carcass weight (HCW) showed significant difference (P < 0.05) among treatments; higher value was observed in T5 (9.36 kg), but the smallest value was recorded for lambs on the T3 (7.36 kg). The higher dressing percentage (DP) on emptyThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cajanus cajan and Lablab purpureus leaf meal-potential supplements over conventional protein sources for yearling Horro sheep fed a basal diet of fodder oat (Avena sativa) hay

“…This variation may have resulted from the different basal feed used in those studies, which in this case was fodder oats. The DM, OM, ADF and NDF digestible intake reported by Shitaneh et al (2021) for Gumuz sheep supplemented with cowpea hay as a replacement for Noug seed cake was lower than the result found in the present study. However, the author reported a higher CP digestible intake value than the current study.…”

“…This variation in final body weight and daily gain might be attributed to the difference in the breed used, and the type and nutrient content of the dietary supplements, as well as basal feed used for the respective studies. The feed conversion efficiency in the present study was also consistent with earlier studies reported for different indigenous sheep breeds, such as Arsi-Bale ( Wegi et al, 2018 ; 0.06–0.09), Abergele ( Gebru et al, 2017 ; 0.066–0.073) and Gumuz ( Shitaneh et al, 2021 ; 0.058–0.086) breeds.…”

“…This could be due to the provision of higher and similar CP, and lower fiber contents of the dietary supplements which might have enhanced the supply of nutrients to ruminal microbes with resultant improvement in total digestibility of dietary nutrients ( McDonald et al, 2010 ). While the concentrate mixture had lower fiber contents than the leguminous forage ( Cajanus cajan and Lablab purpureus ), the lack of significant variation in digestibility coefficients among dietary treatments may be explained by the presence of nitrogen in forage legumes, which promotes roughage feed fermentation in ruminants ( Shitaneh et al, 2021 ). This, in turn, increases the forage legumes' rumen degradability and passage rate through rumen ( MacDonald et al, 2010 ).…”