Influence of age and live body weight on daily milk yield of Zaraibi and Shami goats in Sinai, Egypt

Charallah

et al. 2018

Acta Sci. Anim. Sci.

This research aims to assess the performances of lactating Bedouin goat under arid conditions, focusing on the relationship of milk yield with body and udder morphology and growth traits. Fourteen goats and their kids were followed during early lactation (90 days post-partum). Mean daily milk yield was 0.56 kg. Milk fat, proteins, lactose, solids non-fat and minerals were respectively 34.9, 38.9, 48.8, 107 and 6.7 g L-1. Mean kids’ birth weight, adjusted body weight at 90 days of age and average daily gain were respectively 2 kg, 6.6 kg and 51.4 g day-1. Daily milk yield was correlated with goats’ body weight, withers height, rump height, udder width and udder circumference but not with linear udder score and growth performances. These results provide important data about the milk production of Bedouin goat emphasizing its correlation with body and udder morphological traits which can help to elaborate a specific breeding program for this breed.

Section: Discussionmentioning

confidence: 46%

Milk production and its relationship with milk composition, body and udder morphological traits in Bedouin goat reared under arid conditions

Charallah

et al. 2018

Acta Sci. Anim. Sci.

Animal Physiology Nutrition

“…The slope of the regression of the actual values on predicted values at zero intercepts was 0.9998 ( p < 0.001), i.e. significantly different from zero, which indicated very low (only 0.01% over‐prediction) mean proportional bias in overall prediction (Alsheikh, 2013). The distribution of table values and predicted CP values has been depicted in Figure 2.…”

Section: Resultsmentioning

confidence: 95%

Nutrient requirement equations for Indian goat by multiple regression analysis and least cost ration formulation using a linear and non‐linear stochastic model

Patil

Gupta

Rajendran

et al. 2021

An elaborate multiple regression analysis was done to arrive a nutrient requirement equation for goat including dry matter intake, DMI (kg/day), total digestible nutrient, TDN (g/day) and crude protein, CP (g/day) based on animal body weight (BW) (kg) and average daily gain (ADG)(g/day). The derived equations were highly significant (p < 0.001) and had high R2 (0.99) values. The estimated values of TDN, CP and DMI are compared with NRC (1981), Kearl (Nutrient Requirements of Ruminants in Developing Countries, All Graduate Theses and Dissertations, 1982), as well as ICAR (Livestock Management, 2013). The estimated total TDN and CP requirements at different body weights and ADG are close to the values of recommended feeding standards of Mandal et al. (Small Ruminant Res., 58, 2005, 201). The estimated DMI values are close to the values of ICAR (Livestock Management, 2013) but lower (26.5%–43.8%) as compared to NRC (1981). Regressed values are used to develop a linear programming (LP) model and a stochastic model (SM) for least‐cost ration formulation for the Indian goat breed, whose average BW is about 45 kg and ADG is 130 (g/day), and which is solved using LP simplex and Generalised Reduced Gradient (GRG) nonlinear of Microsoft Excel. The models satisfy the nutrient requirement calculated by regression equations with minimum specified level of variation (usually 5%–10%) in CP and TDN. Both methods adequately meet the nutritional requirements. Therefore, an electronic sheet is developed in Excel to calculate DMI, TDN and CP for different body weights, ADG and formulate the ration by LP and stochastic model.

“…Three experimental rations were formulated to cover goats requirements according to (NRC 1981). The chemical composition of the feed ingreadents and the experimental rations are presented in Table (1). Complete rations (concentrate + alfalfa ) were offered twice daily at 7 am and 4 pm in quantities sufficient to allow free choice access to the ration, and animals have free access to clean fresh water.…”

Section: The Experimental Animals Design and Rationsmentioning

confidence: 99%

Effect of dietary incremental levels of flaxseed supplementation on productive performance of lactating Damascus goats

I¹,

El‐Sayed²,

El-Essawy³

et al. 2020

IJEAB

It is believable that supplemental essential fatty acids can change the fatty Acid (FA) composition in the milk. Feeding flaxseed to dairy animals improves milk production and milk quality, resulting in healthier milk for consumer. So, the objective of our study was to evaluate the effect of inclusion of ascending levels of flaxseed in Damascus goat's ration on performance and milk composition. Twenty-four of lactating Damascus goats (39.60 ±0.50 kg weight and 2-3 years old) were divided into three groups (randomly, eight animals each). The basic diet of control group (T1) consisted of 56.67% concentrate feed mixture (CFM) and 33.33% alfalfa hay and supplemented with 10% full fat soya, while the other groups were supplemented with 5% flaxseed + 5% full fat soya (T2) and 10% flaxseed (T3), respectively. Inclusion of higher level of flaxseed (10%) in goat's ration increases dry matter intake (DMI) with the positive effect on digestibility of most nutrients. In addition, rumen fermentation was affected with increased fat supply where levels of total volatile fatty acids (TVFA's) and ammonia-N (NH 3 -N) are increased with reduced rumen pH values in animals fed on T3. In this study, significant increase of blood plasma total protein, globulin, albumin, urea and high-density lipoprotein concentration, whereas significant decrease of triglycerides, cholesterol and Low-density lipoprotein concentration in response to higher supplemental fat than T1 and T2. Goats supplemented with higher level of flaxseed recorded higher body weight, milk yield and fat corrected milk (FCM) yield, milk fat, protein and total solid content than the other groups (T1 and T2). In conclusion, higher flaxseed supply in dairy Damascus goat's diets resulted in improved total tract digestibility, feed efficiency and rumen fermentation parameters and milk production, milk composition while reduced blood lipids.