Study on the Optimal Levels of Metabolic Energy, Crude Protein, Methionine and Lysine in Diets of Arbor Acres&#215;Roman Hybrid Broilers Aged from 1 to 21 Days

SI Qianqian; BI HuiJuan; ZHANG Tingrong; WANG Shubai; CAO Dingguo

doi:10.3969/j.issn.1006-267x.2016.02.012

2016 , Vol. 28 >Issue 2: 392 - 401

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.02.012

POULTRY NUTRITION

Study on the Optimal Levels of Metabolic Energy, Crude Protein, Methionine and Lysine in Diets of Arbor Acres×Roman Hybrid Broilers Aged from 1 to 21 Days

SI Qianqian ,
BI HuiJuan ,
ZHANG Tingrong ,
WANG Shubai ,
CAO Dingguo

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1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China;
2. Poultry Institute, Shandong Academy of Agricultural Sciences, Jinan 250023, China

Received date: 2015-08-04

Online published: 2016-02-19

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Abstract

The optimal levels of metabolic energy (ME), crude protein (CP), methionine (Met) and lysine (Lys) of Arbor Acres(AA)×Roman hybrid broilers aged from 1 to 21 days were studied in this experiment. The L₉(3⁴)orthogonal experiment design was used, ME levels were 11.70, 12.12 and 12.54 MJ/kg, respectively, CP levels were 19.00%, 20.00% and 21.00%, respectively, Met levels were 0.45%, 0.50% and 0.55%, respectively, Lys levels were 1.0%, 1.1% and 1.20%, respectively. The broilers were randomly assigned into 9 groups with 6 replicates per group and 16 broilers per replicate. The experiment lasted for 21 days. The feeding effects of diets with different nutrient levels were determined by feeding experiment, comparative slaughter experiment and other methods. The results showed as follows:1) the levels of CP, Met and Lys in diets had significant effect on the average daily gain (P<0.05), which in 21.00% CP level group was significantly higher than that in 20.00% CP level group (P<0.05), in 0.50% Met level group was significantly higher than that in 0.55% Met level group (P<0.05), and in 1.20% Lys level group was significantly higher than that in 1.10% Lys level group (P<0.05). 2) The ME level in diets had significant effect on the content of body total energy of 21-day-old broilers (P<0.05), which in 12.12 MJ/kg ME level group was significantly higher than that in 12.54 MJ/kg ME level group (P<0.05). The Met level in diets had significant effect on the content of body ether extract (P<0.05), which in 0.50% and 0.55% Met level groups was significantly higher than that in 0.45% Met level group (P<0.05). 3) The levels of ME and CP in diets had significant effect on the body energy deposition rate of 21-day-old broilers, which in 11.70 and 12.12 MJ/kg ME level group was significantly higher than that in 12.54 MJ/kg ME level group (P<0.05), and in 21.00% CP level group was significantly higher than that in 20.00% and 19.00% CP level group (P<0.05). The body Lys deposition rate of 21-day-old broilers in 1.10% Lys level group was significantly higher than that in 1.20% Lys level group (P<0.05). 4) The Lys level in diets had significant effects on the levels of glucose, uric acid and urea nitrogen in serum of 21-day-old broilers (P<0.05), the glucose level in serum in 1.00% Lys level group was the highest, which was significantly higher than that in 1.20% Lys level group (P<0.05), the uric acid level in serum in 1.10% Lys level group was the highest, which was significantly higher than that in 1.20% Lys level group(P<0.05), and the urea nitrogen level in 1.20% Lys level group was the highest, which was significantly higher than that in 1.10% Lys level group(P<0.05). 5) The regression analysis showed that the optimal level formulas of ME, CP, Met and Lys were ME=45.33W^0.75+183.84△W, CP=19.77W^0.75+626.47△W, Met=1.44W^0.75+10.31△W, Lys=3.01W^0.75+21.28△W (ME was metabolic energy, W^0.75 was metabolic weight, △W was average daily gain, CP was crude protein,Met was methionine and Lys was lysine), respectively. According to the above formulas, the calculated optimal levels of ME, CP, Met and Lys of AA×Roman hybrid broilers aged from 1 to 21 days are 11.90 MJ/kg, 21.08%, 0.51% and 1.05%, respectively.

Key words： hybrid broilers; metabolic energy; crude protein; methionine; lysine; nutrient requirements

Cite this article

SI Qianqian , BI HuiJuan , ZHANG Tingrong , WANG Shubai , CAO Dingguo . Study on the Optimal Levels of Metabolic Energy, Crude Protein, Methionine and Lysine in Diets of Arbor Acres×Roman Hybrid Broilers Aged from 1 to 21 Days[J]. Chinese Journal of Animal Nutrition, 2016 , 28(2) : 392 -401 . DOI: 10.3969/j.issn.1006-267x.2016.02.012

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