摘要:
本研究根据我省的气候特点和可提供的饲料资源,研究适合于本省饲养美国AA(Arbor Acres)鸡和法国红布罗(Redbro)鸡营养需求的饲养标准和饲料配方。在全面分析福州地区常用饲料营养成份的基础上,参照该两品种的饲养标准,按不同生长阶段(小鸡1～30日龄,中鸡31～49日龄,大鸡50～56日龄),应用电子计算机技术,演算三种能量和蛋白质水平的25个配方,由市饲料公司根据试验需要提供配方饲料。三批小区饲养试验计1.5万只。饲养56天。其结果为:(1)高营养水平组的AA鸡平均体重1.98～2.23公斤,肉料比1:1.99～2.28;红布罗鸡平均体重1.70～1.94公斤,肉料比1:2.06～2.27。(2)中营养水平组,AA鸡平均体重1.96～2.15公斤,肉料比1:2.04～2.23;红布罗鸡平均体重1.67～1.91公斤,肉料比1:2.13～2.30。(3)低营养水平组,AA鸡平均体重1.80～2.02公斤,肉料比1:2.27～2.39;红布罗鸡平均体重1.56～1.77公斤,肉料比1:2.27～2.50。经分析表明:净增重,无论AA鸡还是红布罗鸡高、中水平组差异均不显著(P0.05),高、低水平组差异均为极显著(P0.01),中、低水平组差异显著(P0.05)或差异极显著(P0.01)。综合中营养水平组配方的代谢试验,屠宰测定,比较屠宰试验和L16(43)正交试验结果,筛选出由配方9的小鸡阶段配方,配方8的中鸡阶段配方及配
Abstract:
The feed formulas and feeding standards to meet the nutrient requirements of the Arbor Acres and Redbro chickens raised in Fuzhou area were investigated according to the climatic condition and available feed-resources, especially based on the nutrient compositions of feeds usually used there. By the help of the technology of micro computer and the references of feeding standards for these two breeds, twenty-five formulas of three kinds of energy and protein levels were calculated to be nutritionally adequate during starter (1 to 30 days of age) grower (31 to 49 days of age) and finisher (50 to 56 days of age) phases. All experimental feed ingredients were supplied by the local feed company. Three feeding trials were conducted with 15,000 chickens. After 56 days’ feeding, the results showed that: (1) in the group of high nutrition level, the average body weight and gain-feed ratios of Arbor Acres were 1.98 to 2.23 kg and 1 : 1.99 to 1 : 2.28 respectively and those of Redbro were 1.70 to 1.94 kg and 1:2.06 to 1:2.27 rexpectively; (2) in the group of middle levei, those of Arbor Acres were 1.96 to 2.15 kg and 1 : 2.04 to 1 : 2.23 respectively, and those of Redbro were 1.67 to 1.91 kg and 1 : 2.1.3 to 1 : 2.30 respectively; (3) in the group of low level, those of Arbor Acres were 1.80 to 2.02 kg and 1 : 2.27 to 1 : 2.39 respectively, and those of Redbro were 1.56 to 1.77 kg and 1 : 2.27 to 1 :2.50 respectively.The statistical analysis indicated that the net gain of either Arbor Acres or Redbro was no significant difference (P0.05) between the high and middle level, but the significant difference (p 0.01) between the high and low level was found and the difference between the middle and low level was significant (p0.05) or very significant (p0.01) . Summing up the results of metabolic test, carcass measurement, comparative slaughter assay and L16(43) orthogonal experimental design in the group of middle nutrition level, we suggested that the best formula composition was formula No.9 in starter period, No.8 in grower and No.4 in finisher. It was named the fourth formula of broiler chicken’s mixed feed. Through 2,000, 000 chickens feeded in Fuzhou area, we concluded that the mixed feed produced with the fourth formula had more advantages of well-gainad weight and high feed conversion ratio than other formulas for broilers.
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