Semi-posed hens reared on different bed types

SUMMARY In the system of creation in floor the hens are created directly in contact with the floor that can be covered by different types of materials. The aim of this study was to evaluate the thermal environment, behavior, zootechnical indexes and quality of chicken eggs created in two types of flooring, wooden shavings and synthetic grass, were used 120 semi-heavy laying hens, Hysex Brown®, of these, half were created on wooden shaving and half on synthetic grass (Carpet Astro Turf®) distributed in a completely randomized in repeated measures in time in two treatments and two replications of 30 laying hens, during 56 days (two periods of 28 days). Were evaluated temperatures maximum and minimum, dry and wet bulb temperature, black globe temperature, relative humidity, temperature and humidity index and black globe temperature and humidity index; the frequency of natural behavior; the daily egg production per bird, per bird housed, and marketable, viability, feed consumption and feed conversion per dozen and per mass, average egg weight, specific weight and egg shell thickness. Data were analyzed using analysis of variance and means compared by F test at 0.05 probability, except the frequency of natural behavior that was analyzed using the chi square analysis test. The results show that the values of the zootechnical indexes of the layers are consistent with the guide strains recommendations, having no influence from the kind of floor used as bed. Only significant differences were observed in the feed intakeper mass of birds grown under synthetic grass. Thus, it seems that synthetic grass could be an excellent substrate for the bed of semi-heavy laying hens in the egg production phase.

摘要：在地面饲养系统中，蛋鸡直接与地面接触，地面可铺设多种类型的垫料。本研究旨在评估两种垫料（木刨花与合成草皮）地面饲养模式下的热环境、鸡只行为、动物生产性能指标及鸡蛋品质。试验选用120只海兰褐（Hysex Brown®）半重型产蛋鸡，随机分为两个处理组，每组设2个重复，每个重复30只产蛋鸡，分别饲养于木刨花垫料与合成草皮（Astro Turf®地毯）垫料中，采用完全随机设计并开展时间重复测量，试验周期为56天（分为两个28天阶段）。测定指标包括：温湿度环境参数（最高、最低气温，干球温度、湿球温度，黑球温度，相对湿度，温湿度指数及黑球温湿度指数）；鸡只自然行为发生频率；每只鸡日均产蛋量、存栏鸡只日均产蛋量、可售蛋产量；鸡只存活率；饲料消耗量、每打蛋及每单位产蛋质量对应的料蛋比；平均蛋重、蛋比重及蛋壳厚度。数据采用方差分析进行统计处理，组间均值比较采用0.05显著性水平的F检验；鸡只自然行为频率数据则采用卡方检验进行分析。结果显示，产蛋鸡的各项生产性能指标均符合其品系饲养指南的推荐标准，且不受所使用垫料类型的影响；仅合成草皮垫料组的鸡只单位产蛋质量对应的饲料摄入量存在显著差异。综上，合成草皮可作为半重型产蛋鸡产蛋期的优质垫料。