REPLACEMENT OF CHOLINE CHLORIDE BY A VEGETAL SOURCE OF CHOLINE IN DIETS FOR BROILERS

The objective of this study was to evaluate the use of a vegetal source of choline as a replacement of choline chloride in the diet for broilers from one to 21 and 22 to 42 days of age. In the first experiment, we used 1500 Cobb male broilers at one day of age, distributed in a completely randomized design with ten treatments, five repetitions and 30 birds per experimental unit. In the second experiment, we used 1000 Cobb male broiler at 22 days of age, distributed in a completely randomized design with ten treatments, five repetitions and 20 birds per experimental unit. The treatments consisted of five levels of choline chloride 60% (400, 500, 600, 700 and 800 mg kg-1) and five levels of vegetal source of choline (100, 150, 200, 250 and 300 mg kg-1). There was no difference between the performance parameters of broilers in the periods of one to 21 and 22 to 42 days of age. The use of up to 100 mg kg-1 of a vegetal source of choline can replace the use of choline chloride, in the studied levels, in corn-soybean meal diets for broilers from one to 21 and 22 to 42 days of age.

本研究旨在评估植物源胆碱（vegetal source of choline）替代氯化胆碱（choline chloride）在1至21日龄及22至42日龄肉鸡日粮中的应用效果。第一阶段试验选用1日龄科宝（Cobb）雄性肉鸡1500羽，采用完全随机设计，设置10个处理组、5个重复单元，每个试验单元饲养30羽肉鸡。第二阶段试验选用22日龄科宝（Cobb）雄性肉鸡1000羽，同样采用完全随机设计，设置10个处理组、5个重复单元，每个试验单元饲养20羽肉鸡。试验处理包含5个梯度的60%氯化胆碱（添加水平分别为400、500、600、700和800 mg·kg⁻¹），以及5个梯度的植物源胆碱（添加水平分别为100、150、200、250和300 mg·kg⁻¹）。1至21日龄及22至42日龄两个阶段中，肉鸡的各项生产性能参数均无组间差异。在本研究所设定的添加水平范围内，肉鸡玉米-豆粕型日粮中，使用最高100 mg·kg⁻¹的植物源胆碱即可替代其中的氯化胆碱，适用于1至21日龄及22至42日龄肉鸡。