舍饲散栏有窗奶牛舍温热环境的年动态研究

doi:10.16431/j.cnki.1671-7236.2017.10.039

Abstract

Abstract:

The objective of this study was to investigate the annual dynamic of thermal environment of dairy cowshed in free stall-feeding with window. Through continuous detection of the dairy cowshed for 12 months of air temperature, relative humidity and wind speed, the annual variations in these 3 parameters were analyzed. The results indicated that the indoor air temperature was high at noon and low in both the morning and evening, while the opposite tendency in the relative humidity was observed. The indoor air temperature was above 25℃ for 7.5 to 10 h daily in summer, especially in June, the indoor air temperature was higher than outdoor air temperature. In December, the indoor wind speed was almost 0 m/s. From the comprehensive index analysis, during the period of 09:30~19:30 in summer, the temperature humidity index (THI) was above 72, which made dairy cows suffer from mild heat stress. The wind chill temperature (WCT) was not below -10℃ in winter, and the dairy cows did not suffer from cold stress. In conclusion, not only heatstroke prevention in summer but also ventilation enhanced in winter for this dairy cowshed should be paid more attention.

Key words: dairy cow; thermal environment; air temperature; relative humidity; wind speed

CLC Number:

S851.2⁺4

SHAN Chun-hua, CHEN Wei, LI Hong-shuang, QIU Dian-rui, GUO Jian-jun, LIU Ze, GAO Yu-hong. Annual Dynamic Research of Thermal Environment of Dairy Cowshed in Free Stall-feeding with Window[J]. , 2017, 44(10): 3106-3112.

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Annual Dynamic Research of Thermal Environment of Dairy Cowshed in Free Stall-feeding with Window

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