Method for estimating optimal energy protein ratio and feed

Abstract

The invention discloses a method and feed for estimating the optimal energy-protein ratio, and the method comprises the following steps: (1) taking common feed raw material corn-soybean meal as basic ration, and blending bran and soybean oil into compound feed with different metabolic energy AME levels; (2) crushing and uniformly mixing all the raw materials, adding 5% of water, and granulating for later use; (3) adopting a single-factor complete random test design, and selecting healthy test ducks for feeding; (4) calculating the production performance in the feeding stage; at the end of the test, at least one duck with the weight close to the average weight is selected for a slaughtering test every time, and the slaughtering performance is measured; plasma is collected, and glutamic-pyruvic transaminase AST and glutamic oxalacetic transaminase AST are measured. And (5) calculating the optimal energy protein ratio according to a linear broken line regression model (y = l + u * (r-x)). According to the method, the optimal energy-protein ratio is estimated by establishing the regression model of the energy-protein ratio, the production performance and the slaughter performance, the result is more accurate, the application value is higher, and efficient utilization of feed resources is achieved.

Description

technical field [0001] The invention relates to feed, belonging to the technical field of meat duck feed, in particular to a method and feed for estimating the optimal energy-to-protein ratio of feed for reducing belly fat rate of three-eared ducks and improving feed conversion efficiency. Background technique [0002] In the breeding process of Sansui duck, energy and protein raw materials account for more than 80% of the feed cost, and energy and protein nutrition in compound feed are not isolated. Fat deposition, etc. are very critical. Poultry has the characteristics of "eat for energy", and the actual total energy intake is not affected by the energy concentration of the feed by regulating the feed intake (Leeson, S., Caston, L., Summers, J.D., 1996. Broiler response to diet energy. Poultry Sci. 75, 529-535; Xie, M., Zhao, J.N., Hou, S.S., Huang, W., 2010. The apparent metabolizable energy requirement of White Pekin ducklings from hatch to 3 weeks of age. Anim. Feed Sc...

AI Technical Summary

Problems solved by technology

Poultry has the characteristics of "eating for energy". By adjusting the feed intake, the actual total energy intake is not affected by the energy concentration of the feed (Leeson, S., Caston, L., Summers, J.D., 1996. Broiler response to diet energy.Poultry Sci.75,529-535; Xie,M.,Zhao,J.N.,Hou,S.S.,Huang,W.,2010.The apparent metabolizable energy requirement of White Pekin ducklings from hatch to 3 weeks of age.Anim.Feed Sci. Technol.157,95-98.), the low energy-to-protein ratio leads to waste of protein feed resources, lower feed conversion efficiency, and uneconomical breeding; high energy-to-protein ratio causes excessive body fat deposition, and the economic benefit of breeding is poor, because most of the abdomen Fat flows into the oil mill as leftovers and is not directly utilized. On the other hand, when the ratio of energy to protein is unbalanced, other nutrients will be rebalanced, and the overall nutrition will not be balanced, resulting in a lower feed conversion rate.

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