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蛋白质是一切生命的物质基础,是动物的必需营养素,参与组织器官的生长和更新过程,缺乏或过剩都会影响动物的生长发育,日粮蛋白质水平对家禽的健康和生产性能具有很大的影响~([1-2])。近些年来,随着肉仔鸡饲养技术的不断提高,肉鸡饲养越来越成为广大农民发家致富的重要手段。肉鸡饲养效益中,饲料占很重要的因素。为了能够满足肉鸡的生长发育需求,试验从肉鸡4周龄适宜蛋白质水平入手,为鸡群提供一个适合生长的蛋白质水平,从而为养殖户提
Protein is the material basis of all life, is an essential nutrient of animals, involved in the growth and regeneration of tissues and organs, the lack of or excess will affect the growth and development of animals, dietary protein levels have a great impact on poultry health and production performance ~ ([1-2]). In recent years, with the continuous improvement of feeding techniques for broiler chickens, broiler chickens have become increasingly an important means for peasants to get rich and get rich. Broiler feeding benefits, feed accounted for very important factor. In order to meet the growth and development needs of broilers, the experiment started from the suitable protein level of broilers at the age of 4 weeks to provide a suitable level of protein for growing flocks,