Oliveira Carlos Eduardo Alves, Tinôco Ilda de Fátima Ferreira, de Oliveira Victor Crespo, Rodrigues Pedro Henrique de Moura, Silva Leonardo França da, Damasceno Flávio Alves, Andrade Rafaella Resende, Sousa Fernanda Campos de, Barbari Matteo, Bambi Gianluca
Department of Agricultural Engineering, Federal University of Viçosa (UFV), Viçosa 36570-900, MG, Brazil.
Department of Engineering, Federal University of Lavras (UFLA), Lavras 37200-900, MG, Brazil.
Animals (Basel). 2023 Feb 21;13(5):786. doi: 10.3390/ani13050786.
The objective of this study was to characterize the dependence and spatial distribution of bedding attributes in an open compost-bedded pack barn (CBP) system with positive pressure ventilation during the winter period in Brazil. The study was conducted in July 2021, in the Zona da Mata region, Minas Gerais, Brazil. The bedding area (shavings and wood sawdust) was divided into a mesh with 44 equidistant points. At each point, the bedding temperature at the surface (t) and at a depth of 0.2 m (t) and the air velocity at bedding level (v) were measured, and bedding samples were collected. The bedding samples were used to determine the moisture level and pH at the surface (M e pH) and at a depth of 0.2 m (M and pH). The spatial behavior of the variables was evaluated using geostatistics techniques. For all variables, the occurrence of strong spatial dependence was verified. Through the maps, it was observed that t, t, M, M, and v showed high spatial variability, whereas pH and pH demonstrated low variation. On the surface, values of t < 20 °C and M > 60% were observed. At the subsurface, there was a predominance of t < 40 °C, M > 60%, and pH > 9, which are indications of low bedding composting activity.
本研究的目的是描述巴西冬季期间采用正压通风的开放式堆肥垫料舍（CBP）系统中垫料属性的依赖性和空间分布。该研究于2021年7月在巴西米纳斯吉拉斯州的马塔地区进行。垫料区域（刨花和木屑）被划分为一个带有44个等距点的网格。在每个点上，测量垫料表面（t）和0.2米深度处（t）的温度以及垫料层水平处的风速（v），并采集垫料样本。垫料样本用于测定表面（M和pH）以及0.2米深度处（M和pH）的湿度水平和pH值。使用地统计学技术评估变量的空间行为。对于所有变量，均验证了强烈空间依赖性的存在。通过地图观察到，t、t、M、M和v表现出较高的空间变异性，而pH和pH的变异性较低。在表面，观察到t < 20°C且M > 60%。在地下，t < 40°C、M > 60%且pH > 9占主导，这表明垫料堆肥活动较低。
