Productive performance, rumen fermentation and carcass yield of goats supplemented with cascalote fruit (Caesalpinia coriaria J. Wild.)

In order to maximise utilisation of nutrients for ruminants, researchers directed the supply of nitrogen and organic matter synchronously to the rumen. In the current research, two experiments were conducted, one using the in situ nylon bag technique and the other using in vivo study. In Experiment 1, dynamic degradation rates of organic matter (OM) and nitrogen of each feedstuff were determined using the in situ nylon bag technique. Accordingly, three diets were formulated with the same chemical components, but differing in synchrony index (0.74, 0.85 and 0.97). Experiment 2 was subsequently carried out in vivo to evaluate the influence of diet synchrony on rumen fermentation, productive performance, immunity status and endocrine in Chinese Holstein cows. Rumen degradability of OM and neutral detergent fibre (NDF) and total tract digestibility of OM were linearly increased with the increase of synchrony index, respectively (P < 0.05). Total volatile fatty acids concentration of rumen fluid was increased linearly with the increase of synchrony index (P < 0.05). Meanwhile, rumen ammonia nitrogen concentration and blood urea nitrogen concentration were decreased in cows with the increase of synchrony index, (P < 0.05). Microbial crude protein production, the efficiency of microbial protein synthesis, and milk protein percentage, were linearly increased with the increase of synchrony index (P < 0.05). Serum concentrations of prostaglandin E2 and immunoreactive fibronectin-γ were linearly decreased with the increase of diet synchrony index (P < 0.05). The aforementioned results implicate that an increase of diet synchrony index could improve diet’s nitrogen utilisation, apparent digestibility of OM, and NDF. Additionally, it could promote rumen fermentation capacity, productive performance and immunity status in dairy cows.

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Effects of malate supplementation to the concentrate feed on performance, rumen fermentation and carcass yield of lambs fed forage at restricted and ad-libitum level

Ankara Üniversitesi Veteriner Fakültesi Dergisi ◽

10.1501/vetfak_0000002890 ◽

2019 ◽

Vol 66 (1) ◽

pp. 73-81

Author(s):

TOPRAK Neşe Nuray; ÖZTÜRK

Keyword(s):

Rumen Fermentation ◽

Carcass Yield ◽

Ad Libitum

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Growth Performance, Meat Quality and Antioxidant Status of Sheep Supplemented with Tannins: A Meta-Analysis

Animals ◽

10.3390/ani11113184 ◽

2021 ◽

Vol 11 (11) ◽

pp. 3184

Author(s):

José Felipe Orzuna-Orzuna ◽

Griselda Dorantes-Iturbide ◽

Alejandro Lara-Bueno ◽

Germán David Mendoza-Martínez ◽

Luis Alberto Miranda-Romero ◽

...

Keyword(s):

Blood Serum ◽

Oxidative Stability ◽

Antioxidant Capacity ◽

Meat Quality ◽

Antioxidant Status ◽

Meta Analysis ◽

Daily Weight Gain ◽

Productive Performance ◽

Muscle Area ◽

Carcass Yield

The objective of this study was to evaluate the effects of dietary supplementation with tannins (TANs) on productive performance, carcass characteristics, meat quality, oxidative stability, and blood serum antioxidant capacity of sheep through a meta-analysis. Using Scopus, Web of Science, ScienceDirect, and PubMed databases, a systematic search was performed for studies published in scientific journals that investigated the effects of TANs supplementation on the variables of interest. Only studies with weaned or older sheep were included. The data analyzed were extracted from 53 peer-reviewed publications. The sheep included in the present study were between 2 and 6 months old, and between 12 and 31 kg of body weight. The effects of TANs were analyzed using random-effects statistical models to examine the standardized mean difference (SMD) between treatments with TANs and control (no TANs). Heterogeneity was explored by meta-regression and a subgroup analysis was performed for covariates that were significant. Supplementation with TANs did not affect dry matter intake, pH, color (L* and b*), Warner–Bratzler shear force, cooking loss and meat chemical composition (p > 0.05). Supplementation with TANs increased daily weight gain (SMD = 0.274, p < 0.05), total antioxidant capacity (SMD = 1.120, p < 0.001), glutathione peroxidase enzyme activity (SMD = 0.801, p < 0.001) and catalase (SMD = 0.848, p < 0.001), and decreased malondialdehyde (MDA) concentration in blood serum (SMD = −0.535, p < 0.05). Supplementation with TANs decreased feed conversion rate (SMD = −0.246, p < 0.05), and the concentration of MDA (SMD = −2.020, p < 0.001) and metmyoglobin (SMD = −0.482, p < 0.05) in meat. However, meat redness (SMD = 0.365), hot carcass yield (SMD = 0.234), cold carcass yield (SMD = 0.510), backfat thickness (SMD = 0.565) and the Longissimus dorsi muscle area (SMD = 0.413) increased in response to TANs supplementation (p < 0.05). In conclusion, the addition of tannins in sheep diets improves productive performance, antioxidant status in blood serum, oxidative stability of meat and some other characteristics related to meat and carcass quality.

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Different calcium sources on the productive performance and bone quality of meat quail

Ciência Rural ◽

10.1590/0103-8478cr20210446 ◽

2022 ◽

Vol 52 (6) ◽

Author(s):

Daniela da Silva Mendonça ◽

Sandra Roseli Valerio Lana ◽

Geraldo Roberto Quintão Lana ◽

Ana Patrícia Alves Leão ◽

Romilton Ferreira de Barros Júnior ◽

...

Keyword(s):

Weight Gain ◽

Feed Intake ◽

Oyster Shell ◽

Average Weight ◽

Dry Matter Content ◽

Productive Performance ◽

Feed Conversion ◽

Carcass Yield ◽

Bone Parameters ◽

Calcium Sources

ABSTRACT: This study was developed to examine the effect of using charru mussel-, maçunim- and oyster-shell meals as calcium sources on the productive performance, carcass yield and bone parameters of meat quail. A total of 250 one-day-old non-sexed European quail were used. The birds were distributed into five treatments (calcium sources: calcitic lime, calcium carbonate, charru mussel shell meal, maçunim shell meal or oyster shell meal) in a completely randomized design with five replicates and ten birds per experimental unit. Feed intake, weight gain and feed conversion were evaluated from one to 35 days. At 35 days, two birds with the average weight of the plot were slaughtered per plot and used for analysis of carcass yield and bone parameters. There were no significant differences (P > 0.05) in feed intake, weight gain, feed conversion, carcass yield or tibia dry matter content, ash content and strength. The charru mussel-, maçunim- and oyster-shell meals can be used as calcium sources in the diet of European quail without affecting their productive performance, carcass yield or bone mineralization.

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