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The distribution of deep-litter temperature in a dairy barn

100%

Nawalany G. , Herbut P. , Sokołowski P. , Angrecka S.

Infrastruktura i Ekologia Terenów Wiejskich

2017

tom nr II/2

803--811

The paper presents results of studies of some indoor microclimate parameters and temperature of litter bedding in a freestall barn used to house dairy cattle in a deep-litter bedding system. The studies were conducted in the period from 22 March 2014 to 22 March 2015. The analysis of distribution of litter surface temperature showed its strong relationship with indoor air temperature. In summer, temporary exceedances of the allowable indoor air temperature by even 12 °C were noted. The studies showed a significant effect of the number of animals in the barn on litter surface temperature. In the periods when cows stayed in the barn, two zones could be distinguished: the sidewall zone 1.5 m wide at the western outside wall of the building and the inner zone encompassing the remaining part of the barn. Differences in litter temperature between these zones, when cows stayed in the barn, reached 10°C. When the building was empty and animals were on pasture, the differences between litter surface temperatures were much smaller and did not exceed 3°C.

Broiler house microclimate in light of experimental studies

63%

Radon J. , Bieda W. , Nawalany G.

nr 2

This study presents and discusses the results of 2-year measurements of air temperature, air humidity, litter temperature and litter moisture in a broiler house and of ground temperature below the floor and outside the building. Except temporary overheating, air temperature was found to conform to animal breeding standards. Air humidity was too low at the start of rearing and had to be additionally increased. It was subject to considerable fluctuations in the summer cycles. Litter studies showed that broiler chickens were exposed to adequate temperature for 20 days during the winter production cycle and for just 7 days during the summer cycle. Changes in litter moisture showed an upward trend in time. Litter moisture was greater next to walls than in the centre of the production facility. The time course of litter moisture was approximated by a quadratic function. Results of ground temperature measurements revealed considerable heat accumulation in the ground and its cooling during technolo.