Oliveira Vanessa R M, Arruda Alex M V, Melo Aurora S, Souza Davyd H, Souza-Junior João B F, Fernandes Raimunda T V, Queiroz João P A F
Department of Animal Sciences, Universidade Federal Rural do Semi-Árido, Mossoró 59625900, Brazil.
Department of Animal Science, Federal University of Ceara, Fortaleza, CEP 60455-760, Brazil.
Anim Nutr. 2019 Dec;5(4):432-434. doi: 10.1016/j.aninu.2019.03.002. Epub 2019 Apr 11.
One of the possible ways to optimize the productive performance of poultry is through the physical processing of ingredients, which can improve the use of nutrients in these animals. In this context, this study was to evaluate the effects of different corn particle sizes in diets on the productive performance and egg quality of semi-heavy laying hens. Sixty naked neck laying hens were used from 24 weeks of age and distributed in a completely randomized design. Experimental diets in different treatments contained corn grain ground into sieves with a diameter of 2, 4, or 8 mm to provide corn particles with a geometric mean diameter (GMD) of 605 (fine), 1,030 (medium), and 2,280 μm (coarse), respectively. The feed and leftovers were weighed daily throughout the experimental period to determine the feed intake and feed conversion. Different corn particle sizes did not affect any aspect of the productive performance of hens, except for feed intake. Hens fed fine and medium corn particles exhibited higher values for egg yolk color, eggshell weight, and eggshell thickness. It is suggested that semi-heavy laying hens should be fed mash diets containing corn particles with GMD from 605 to 1,030 μm, because coarse corn particles cause a negative effect on eggshell quality.
优化家禽生产性能的一种可能方法是对饲料原料进行物理加工，这可以提高这些动物对营养物质的利用率。在此背景下，本研究旨在评估日粮中不同玉米粒度对半重型蛋鸡生产性能和蛋品质的影响。选用60只24周龄的裸颈蛋鸡，采用完全随机设计进行分组。不同处理的实验日粮包含通过直径为2、4或8毫米筛网研磨的玉米粒，以分别提供几何平均直径（GMD）为605（细）、1030（中）和2280微米（粗）的玉米颗粒。在整个实验期间每天对饲料和剩余饲料进行称重，以确定采食量和饲料转化率。除采食量外，不同玉米粒度对蛋鸡生产性能的任何方面均无影响。饲喂细粒度和中粒度玉米颗粒的蛋鸡，其蛋黄颜色、蛋壳重量和蛋壳厚度的值更高。建议对半重型蛋鸡饲喂含有GMD为605至1030微米玉米颗粒的粉料日粮，因为粗粒度玉米颗粒会对蛋壳质量产生负面影响。
