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Feasibility of Bedded Hoop Barns for Market Beef Cattle in Iowa: Cattle Performance, Bedding Use, and Environment

机译:在爱荷华州,市场化牛用带圈箍仓的可行性:牛的性能,被窝使用和环境

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摘要

The objective was to document a bedded hoop barn for feeding market beef cattle. A comparison between a bedded hoop barn (15.2 × 36.6 m) and an open-front feedlot building (11.0 × 61.0 m) was conducted in southwest Iowa. The hoop barn was oriented north-south on a ridge with no windbreak. In summer, temperature was relatively consistent between the structures and ambient conditions, although the north end of the hoop barn had a slightly elevated dew point temperature. A summer temperature-humidity index showed that the hoop barn had fewer hours in u22alertu22 category than either open front or ambient conditions. In winter, a cold stress index showed that the open-front barn provided the most shelter for the cattle with 92% of the hours classified as u22no impact,u22 compared with the hoop barn at 77% and ambient at 51%. Both ends of the hoop barn were open, except for piled big round bales for a windbreak during winter. Growth, feed-to-gain, and dry matter intake for the cattle were similar between housing systems. Quality and yield grades were similar. Mud scores may be less for cattle from the bedded hoop barn compared with the open-front feedlot where mud was possible. Labor usage was similar for the hoop barn and the open-front feedlot. Labor occurred throughout the feeding period for the hoop barn because manure cleaning occurred weekly. Bedded hoop barns offer a viable alternative for feeding beef cattle and may reduce feedlot runoff.
机译:目的是记录一个卧式圈养谷仓,用于饲养市场肉牛。在爱荷华州西南部比较了层状箍谷仓(15.2×36.6 m)和开放式饲养场建筑物(11.0×61.0 m)。环形谷仓在没有防风林的山脊上朝向南北方向。在夏季,尽管环棚的北端露点温度略有升高,但结构和周围环境之间的温度相对稳定。夏季温度-湿度指数显示,在开放式或环境条件下,箍谷仓的小时数较少。在冬季,冷胁迫指数显示开放式谷仓为牲畜提供​​了最多的庇护所,其中92%的时间归为“无影响”,相比之下,圈养谷仓为77%,环境为51%。箍谷仓的两端都敞开了,除了堆放着大捆的圆形捆包,以便在冬季防风。牛的生长,饲料获取和干物质摄入在住房系统之间是相似的。质量和产量等级相似。与可能存在泥浆的敞开式饲养场相比,来自卧式圈养谷仓的牛的泥浆评分可能更低。箍仓和前开式饲养场的人工使用量相似。因为每周都要进行粪便清洁,所以在整个饲喂周期中都需要进行人工劳动。卧式圈养谷仓为饲养肉牛提供了一种可行的选择,并可减少饲养场的径流。

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