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

Nguyen Dire Trudng vd D/g Tgp chi KHOA HQC & CONG NGHE 123(09): 161 - 166

PERFORMANCE OF THREE BREEDS OF BROILER CHICKEN FED

WITH DIFFERENT LEVELS OF METABOLIZABLE ENERGY

Nguyen Due Truong', Tu Trung Kien^", Nguyen Hung Quang^ Laguna Stale Polytechnic University. Siniloan. Laguna

^College 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 maner 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 I. However, the best feed

conversion ratio was given by ihe 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 fal and breast muscle crude fai 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 Ihe 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 lo maximize profit.

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

BACKGROUND converters, producing good quality meat

According to recently on statistics, chicken They are adapted to the climate and are well￾has appropriated 20 - 25% of total meat accepted by consumers. Raising poultry has

produclion in Viet Nam (Giao, 2006). been satisfying more and more the need of

Nowadays in Viet Nam, the raising of broiler humans for eggs and meat (Cabel et al, 1991).

chickens has developed in three modes: With the development of the economy, and an

intensive, semi-intensive and range type (My, improved standard of living, the demand for

1997). In order to meet the demand for chicken meat also increasing (Smgh and

poultry products, Viet Nam has imported Pada. 1998), thus, investment in breeding and

different kinds of breed of chicken such as feeding technology is necessary to satisfy the

Hybro. Avian, BE88. ISA, AA. Ross 308, raising of chickens. General Statistics of Viet

Lohmann, Cobb Hubbard and other breed ^^m (2005) reported that the gross value of

from other countries. These breeds are high agriculture production in the country was

producing, fast growing and efficient feed estimated at 960 billions VND. 219 2 millions

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of animals, the poultr\ sub-sector accounted

for 22 percent of ihc tolal agricultural

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