Dissertation abstracts: Determination of optimal protein level in exotic fattener pig's diet bases on balancing some amino acids

Objective of study determining diet formula for 4-breeds exotic hybrid with optimal protein level bases on balancing some essential amino acids includes: lysine, methionine and threonine in order to improve grow capacity, feed utilization efficiency and to reduce urinal and faecal nitrogen and phosphorus excretion; formulating some formulas base on the local ingredients with optimal protein and amino acids level to ensure production efficiency of exotic 4-breeds hybrid and to reduce environment pollution in pig production.
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Dissertation abstracts: Determination of optimal protein level in exotic fattener pig’s diet bases on balancing some amino acids 1 INTRODUCTION1. The demand of the research study Currently, in order to adequate domestic consumption as well as export market demand for pork consumption, beside increasing of rearing local swine breeds and hybrid of exotic with local breeds, it’s a tendency that to keep hybrids with 4 – 5 exotic swine breeds which attracts more attention of farmers to expand their production. A part from improvement of the breed in term of productivity and quality, it also requires improvement in term of nutrition for animals, especially research on requirement of protein and amino acid for growing pigs. The modern opinion on animal nutrition considers that protein requirement is the requirement of amino acids. If there is inadequacy of essential amino acids supplement (in term of quantity and amino acid balance) then it would lead to retard of grow in animal which would affect production and economic efficiency. On the other hand, though it is enough protein or even surplus protein in pig diet but this is unbalanced of essential amino acids then digestibility and feed utilization efficiency of the diet will be reduced. Thus, the reduction of protein level in the diet and supplement of synthesized amino acids are the best solutions to adequate animal requirement of amino acids and also reduce environmental pollution in pig production. When calculate protein requirement in pig diet, the calculation of protein levels are usually based on the studies on protein requirement or just adopt the published standard for the main amino acids requirements such as lysine and methionine, however, other amino acids requirement is not estimated. In order to meet amino acids requirement for pig. Pig producers and feed processing companies usually use the formula with high level of protein to formulate feed without taking into account the insufficient of protein utilization due to the surplus of amino acids which leads to a surplus of nitrogen and sulfur excreted into environment. In addition, the price of protein sources of animal and plant origin such as soybean meal, fishmeal etc. increases rapidly, which negatively affect economic efficiency of pig production. With the development of biotechnology, it is possible to produce amino acids from mirco-organism and from chemical elements with lower price, especially the production of essential amino acids such as lysine, threonine and methionine. The advanced of amino acids production technology creates opportunity to carry out and apply the studies on essential amino acids requirement in order to adequate amino acids requirement for pig, efficiency utilization of protein, reduction of environment pollution, and also normal growth of animals. Based on the above reasons, we undertake the study: “Determination of optimal protein level in exotic fattener pig’s diet bases on balancing some amino acids”2. Objective of study - Determining diet formula for 4-breeds exotic hybrid with optimal proteinlevel bases on balancing some essential amino acids includes: lysine, methionine andthreonine in order to improve grow capacity, feed utilization efficiency and to reduceurinal and faecal nitrogen and phosphorus excretion. - Formulating some formulas base on the local ingredients with optimal proteinand amino acids level to ensure production efficiency of exotic 4-breeds hybrid andto reduce environment pollution in pig production. 23. The effective of study3.1. In term of practice effectiveness The study has proposed 2 diet formulas with an optimal protein level and abalance of some synthetic amino acids (lysine, methionine and threonine) for exoticfattener swine. The diet formulas have ensured the good performance of pig, theformulas not only saved protein but also reduced environment pollution. Results ofstudy have been applied in commercial production at Dai Minh feed processingcompany – Song Cong Town, Thai Nguyen and other intensive pig production farmsin the area.3.2. In term of scientific effective The results of study has provided some scientific data to prove the efficiency ofsynthetic amino acids utilization to balance diet on the “Ideal protein” principle inorder to reduce the total protein level but ensure production efficiency and reduceenvironment pollution.4. Scope of study - Objects of study + Commercial hybrid of 4 exotic pig breeds between male F1 (Pietrain xDuroc) x female F1 (Landrace x Yorshire)], Starting bodyweight of experimentalunits was from 18.15 - 18.22 kg/pig (equivalant to 56 day of age). + Feed ingredients to formulate experimental diet include yellow maize,soybean ...