Effect of different levels of dietary crude protein on the growth performance and carcass characteristics of commercial broilers at different phases of growth

2017 ◽  
Author(s):  
T. Srilatha ◽  
V. Ravinder Reddy ◽  
V. Chinni Preetam ◽  
S.V. Rama Rao ◽  
Y. Ramana Reddy
Keyword(s):  
Amino Acids ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Carcass Characteristics ◽  
Abdominal Fat ◽  
Dietary Crude Protein ◽  
Low Levels ◽  
Different Levels

An experiment was conducted to find out the effect of different levels of crude protein in broiler diets during different phases. i.e., pre starter (0-11d), starter (12-21d) and finisher (22-42d). 360 day-old broilers (Vencobb) were procured from a commercial hatchery and fed either high or low dietary CP diets during pre-starter (23 and 21%) , starter (21 and 19%) and high, moderate or low CP diets during finisher ( 18.5, 17.5 and 16.5%) phases, for a total of 12 possible treatment combinations at d 42. The results showed that the broilers fed low levels of CP ( 21 and 19 %) had significantly(P less than 0.05) higher body weight gain (BWG) and feed intake (FI), and better feed efficiency over the diets with high levels of CP during pre-starter and starter phases (23 and 21%, respectively). The higher (18.5%) level of protein in the finisher phase showed higher BWG and best FCR compared to the lower levels (17.5 and 16.5%). Carcass characters were not influenced by the variation in dietary CP level tested except the abdominal fat weight which was significantly higher in broiler fed low CP diet compared to those fed higher levels of CP during all three phases. The results indicated that the broilers fed low CP diets supplemented with critical amino acids (21 and 19%) had beneficial effect on the growth performance during pre-starter and starter phase. The broilers showed an ability to respond to increase in dietary CP levels during finisher phase.

Effect of reduced dietary crude protein and supplemental limiting amino acids on the growth and carcass characteristics of Swarnadhara chicks

2018 ◽  
Author(s):  
Beena C. Joseph ◽  
Jayanaik T. Munegowda ◽  
Chandrapal . ◽  
K. Singh ◽  
V. Malathi
Keyword(s):  
Amino Acids ◽  
Growth Performance ◽  
Crude Protein ◽  
Control Diet ◽  
Carcass Characteristics ◽  
Feed Conversion ◽  
Breast Meat ◽  
Dietary Crude Protein ◽  
Carcass Parameters ◽  
Limiting Amino Acids

A six-week trial was conducted to determine the effect of lowering dietary crude protein levels with supplementation of limiting amino acid on growth performance, and carcass characteristics in one of the Indian improved crossbred Swarnadhara chicks in a completely randomized design having five treatments and four replications of 20 birds in each. Five isocaloric (2800 ME Kcal//kg) experimental diets based on corn-soy bean meal were formulated in a gradual crude protein decline from 21 % (control T1) to 19% by 0.5% interval. The levels of limiting amino acids namely methionine, lysine, threonine and tryptophan were met as that of control (T1) by adding synthetic preparations. Highest body weight was recorded in 2% crude protein reduced group (T5) which was comparable with control (T1). However, cumulative feed intake and feed conversion ratio of different treatments were not significantly different. Moreover, carcass parameters like dressing percentage, breast meat yield, liver and heart weights remained unaffected by the dietary treatments. Relative gizzard weight and abdominal fat weights showed variations and lower dietary protein diets were comparable with control diet (T1). In summary, crude protein content of Swarnadhara chick diet can be reduced to 19% with essential AA fortification without any adverse effect on growth performance and carcass characteristics during 0-6 weeks of age.

scholarly journals Effect of Dietary Crude Protein and Amino Acid Contents on Growth Performance and Carcass Characteristics in Korean Native Ducks

2013 ◽  
Vol 40 (4) ◽  
pp. 351-359
Author(s):  
Hyung Joo Kwon ◽  
Yun Kyung Choo ◽  
Sung Taek Oh ◽  
Hak Kyu Kim ◽  
Chang Won Kang ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Crude Protein ◽  
Carcass Characteristics ◽  
Dietary Crude Protein ◽  
Amino Acid Contents

Effects of different concentrations of ground oak acorn on growth performance, blood parameters and carcass characteristics of goat kids

2015 ◽  
Vol 55 (1) ◽  
pp. 87 ◽  
Author(s):  
E. Froutan ◽  
O. Azizi ◽  
G. Sadeghi ◽  
F. Fatehi ◽  
S. Lashkari
Keyword(s):  
Growth Performance ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Blood Parameters ◽  
Abdominal Fat ◽  
Conversion Ratio ◽  
Feed Conversion ◽  
Low Concentrations ◽  
Daily Gain ◽  
Different Levels

The objective of the present study was to evaluate the effect of different levels of ground oak acorn on growth performance, blood parameters and carcass characteristics. Twenty-four goat kids averaging 16.93 ± 1.25 kg initial bodyweight were randomly assigned to four experimental diets in a completely randomised design for 90 days. The experimental diets consisted of (1) 0% oak acorn (control), (2) 8% oak acorn, (3) 17% oak acorn and (4) 25% oak acorn on a DM basis. The goats were slaughtered after 105 days of feeding and carcass characteristics were measured. DM intake increased linearly in small amounts as the level of acorn in the diet increased (P < 0.004). The results showed that average daily gain, water intake and feed conversion ratio were unaffected by levels of ground oak acorn (P > 0.05). There were no significant differences in blood parameters (P > 0.05). Carcass fat depth and abdominal fat weight decreased with increasing ground oak acorn in the diet. Other carcass characteristics were not affected by different levels of ground oak acorn. On the basis of the results of the present study, it may be concluded that ground oak acorn can be used up to 25% in the diets of young goats without any adverse effects on growth performance and carcass characteristics. At this level of acorns, the goats received low concentrations of hydrolysable tannins (11 g/kg DM) in their diet.

scholarly journals The effect of synthetic essential amino acids supplementation to low crude protein diets on growth performance and serum metabolites in broiler chickens

2019 ◽  
Vol 20 (3) ◽  
pp. 24-29 ◽  
Author(s):  
Ahmed Elshafey ◽  
Abeer Aziza ◽  
, Abdelhady Orma ◽  
Tarek Mohamed
Keyword(s):  
Amino Acids ◽  
Body Weight ◽  
Growth Performance ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Relative Weight ◽  
Essential Amino Acids ◽  
Controlled Study ◽  
Broiler Chicks ◽  
Final Body Weight

Objective: To assess the influence of reduction of crude protein (CP) by 5% and 10% with supplementation of crystalline synthetic essential amino acids (EAAs) on performance and carcass traits of broilers. Design: Randomized controlled study Animals: A total of 320 one-day-old broiler chicks, (Cobb 500) reared up to 35 days of age were randomly allocated into eight experimental groups with four replicates (10 each). Procedures: The treatments as follow; the first group of chicks were fed on control protein to meet the CP requirement and total AAs according to Cobb 500 recommendation; the second group were fed idle EAAs (Id EAAs) to meet the recommended CP and the digestible EAAs. The third, fourth, and fifth groups were fed on diet 5% reduction of CP with EAAs supplementation exceed the digestible EAAs requirement of Cobb by 110, 120, and 130% (LCP3+110EAAs, LCP4+120EAAs, LCP5+130EAAs). However, the sixth, seventh, eighth groups of chicks were fed on diet 10% reduction of CP with AAs supplementation exceed the digestible EAAs requirement of Cobb by 110, 120, and 130% (LCP6+110EAAs, LCP7+120EAAs, LCP8+130EAAs). Results: Broilers of group four, five, six, seven and eight showed a significant decrease final body weight (BW), body weight gain (BWG) and feed intake at 21 and 35 days of age. However, the same variables were significantly enhanced in broilers of group one, two, and three (p <0.05). Additionally, there was a significant decrease of relative weight of abdominal fat pad of broilers in groups three, four, five compared to other treatment groups. Serum uric acid and cholesterol were linearly decreased with reduction of CP and supplementation with synthetic essential amino acids. Conclusion and clinical relevance: The present results indicate that reduction of CP by 5% or 10% with crystalline EAAs supplementation by 110, 120 and 130% more than the digestible EAAs of broiler recommendation did not support the growth performance.

scholarly journals Effect of Varied Levels of Dietary Crude Protein and Metabolizable Energy on Growth Performance in Giriraja Chicken

2017 ◽  
Vol 12 (4) ◽  
Author(s):  
H. N. Rajeswara ◽  
Jaya Naikand ◽  
C. S. Nagaraja
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Metabolizable Energy ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Dietary Crude Protein

A study was conducted for 56 days to observe the effect of varied levels of dietary crude protein and metabolizable energy on growth performance in 720 day-old Giriraja chicks, which were divided equally into nine groups of 80 birds each. Nine different experimental diets were formulated with three levels 2700, 2800, and 2900 kcal of metabolizable energy (ME/kg), each with three levels of protein (CP), viz., 19%, 20%, and 21%, respectively and Group T5 served as control fed with 20% protein and 2800 kcal energy as per BIS (2007) requirements. Feed consumption, body weight gain, and feed conversion ratio (FCR) were analysed up to 56 days. The results of the study indicated that diet containing 20% CP with 2900 kcal ME/kg showed enhanced growth performance in Giriraja chicks.

EFFECT OF DIETARY SUPPLEMENTATION OF ZINC ON GROWTH PERFORMANCE AND NUTRIENT UTILIZATION IN KIDS

2016 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Nayak ◽  
L. Thakur ◽  
R.P.S. Baghel ◽  
A.K. Patil ◽  
C.D. Malapure ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Basal Diet ◽  
Nutrient Utilization ◽  
Efficiency Ratio ◽  
Feed Efficiency Ratio ◽  
Average Body

Present study was undertaken to evaluate the effect of zinc supplementation on growth performance and nutrient utilization in kids. Twenty four goat kids (4-6 month age) were randomly divided into 4 groups (T1, T2, T3 and T4) having 6 kids each. Kids in the group T1 were fed basal diet which contained 29.02 mg Zn/kg DM from ingredients of ration without any additional Zn supplementation. Kids in the T2, T3 and T4 groups were fed the same basal diet with additive 20, 50 and 100 ppm Zn (as ZnSO4) in their diets, respectively. The study was conducted for 90 days. Digestion trial of 7 days was conducted towards the end of experiment to assess the digestibility of the nutrients. Results indicated significantly higher average body weight gain, crude protein (CP) digestibility and better feed efficiency in kids fed diet supplemented with 50.0 mg Zn/kg DM. From the results it was concluded that the Zn supplementation @ 50.0 mg/kg DM in basal diet significantly improved body weight (BW) gain, CP digestibility and feed efficiency ratio (FER) of kids.

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