Đánh giá khả năng sản xuất của ba giống gà thịt broiler với các mức năng lượng trao đổi khác nhau = performance of three breeds of broiler chicken fed with different levels of metabolizable energy

Nguyễn Đức Trường và Đtg Tạp chí KHOA HỌC & CÔNG NGHỆ 123(09): 161 - 166

161

PERFORMANCE OF THREE BREEDS OF BROILER CHICKEN FED

WITH DIFFERENT LEVELS OF METABOLIZABLE ENERGY

Nguyen Duc Truong1

, Tu Trung Kien2*, Nguyen Hung Quang2

1 Laguna State Polytechnic University, Siniloan, Laguna 2College of Agriculture and Forestry - TNU

SUMMARY

Employing a 3x3 factorial experimental in a Randomized Complete Block Design (RCBD), the

study attempted to find answers to the specific questions presented in this study. The factors that

were used in this study were the breed of broiler and level of metabolizable energy. The broiler

breed has 3 levels, namely: Ross, Cobb and CP 707, while the metabolizable energy also has 3

levels as determined by various rate of discussion at different stages of the growing period. In

comparing the production performance of the different breed as affected by three levels of

metabolizable energy in the ration, the following parameters were used in this study: survival rate,

body weight; feed consumption; feed conversion ratio; performances index; dressing percentage;

quality of meat; and gross profit margin of production. The results showed that there was no

significant difference in the levels of metabolizable energy in the breeds of chickens used in the

study. However, significant level of metabolizable energy effects were observed on final

bodyweight, feed consumption, feed conversion ratio, performances index, breast meat yield,

abdominal fat yield, crude fat content of breast muscle and inorganic matter content of breast

muscle. No significant levels of metabolizable energy effects were detected in the other variables

in this study. Likewise, significant broiler breed effects were observed on the total feed

consumption and on the gross profit margin of production. The birds fed with metabolizable

energy level 3 gave the highest final bodyweight but with the highest feed consumption which is

the same as that of the birds fed with metabolizable energy level 1. However, the best feed

conversion ratio was given by the birds fed with mebolizable energy level 3. Metabolizable energy

level 3 also effected the highest performance index and highest breast muscle yield and the highest

abdominal fat and breast muscle crude fat contents. On the other way around, the Cobb and the CP

707 consumed equal and highest amount of feeds compared with the feed consumption of the Ross

broiler strain. However, in terms of gross profit margin of production, the CP 707 gave the best

performance. In view of the above – stated finding and conclusions, CP 707 strain is recommended

for commercial broiler production purposes in order to maximize profit.

Key words: Broiler chicken, Cobb, Ross 208, CP 707, Feed consumption, Body weight gain

BACKGROUND*

According to recently on statistics, chicken

has appropriated 20 - 25% of total meat

production in Viet Nam (Giao, 2006).

Nowadays in Viet Nam, the raising of broiler

chickens has developed in three modes:

intensive, semi-intensive and range type (My,

1997). In order to meet the demand for

poultry products, Viet Nam has imported

different kinds of breed of chicken such as

Hybro, Avian, BE88, ISA, AA, Ross 308,

Lohmann, Cobb Hubbard and other breed

from other countries. These breeds are high

producing, fast growing and efficient feed

* Tel: 0902119828

converters, producing good quality meat.

They are adapted to the climate and are well￾accepted by consumers. Raising poultry has

been satisfying more and more the need of

humans for eggs and meat (Cabel et al, 1991).

With the development of the economy, and an

improved standard of living, the demand for

chicken meat also increasing (Singh and

Pada, 1998); thus, investment in breeding and

feeding technology is necessary to satisfy the

raising of chickens. General Statistics of Viet

Nam (2005) reported that the gross value of

agriculture production in the country was

estimated at 960 billions VND, 219.2 millions

of animals, the poultry sub-sector accounted

for 22 percent of the total agricultural