Short communication: Comparison of ambient temperature, relative humidity, and temperature-humidity index between on-farm measurements and official meteorological data

Abstract The aim of this study was to establish physiological responses of Piemontese cows to different environmental conditions (ambient temperature, relative humidity and temperature-humidity index). To this end, 43 clinically healthy Piemontese cows aged 2-12 years were used to evaluate the effect of environmental conditions on haematological parameters. For each period, ambient temperature and relative humidity were recorded by means of a data logger and the temperature-humidity index (THI) was calculated as indicator of thermal comfort for cattle. Blood samples were collected at 4 time points under different environmental conditions (T1, T2, T3 and T4) and analysed for haematological parameters. One way repeated measure analysis of variance showed a statistically significant effect of time (P<0.0001) on RBC, Hb, Hct, MCV, MCH, MCHC, Plt, WBC, neutrophils, lymphocytes, monocytes and eosinophils. The majority of haematological values obtained in the present study, even though within the physiological range for cattle, showed that variations in haematological parameters are related to changes in ambient temperature, relative humidity and temperature-humidity index. These results provide insight into the physiological responses of Piemontese cows to different environmental conditions, allowing to better evaluate its ability to adapt and cope with environmental stress.

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Respon Fisiologis dan Kualitas Susu Sapi Perah Friesian Holstein pada Musim Kemarau Panjang di Dataran Tinggi

Jurnal Agripet ◽

10.17969/agripet.v16i2.5888 ◽

2016 ◽

Vol 16 (2) ◽

pp. 131

Author(s):

Elmy Mariana ◽

Didik Nurul Hadi ◽

Nur Qoim Agustin

Keyword(s):

Body Temperature ◽

Relative Humidity ◽

Ambient Temperature ◽

Dairy Cows ◽

Pulse Rate ◽

Rectal Temperature ◽

Physiological Responses ◽

Mean Value ◽

Humidity Index ◽

The Mean

ABSTRAK. Tujuan dari penelitian ini adalah untuk mempelajari respon fisiologi, produksi dan kualitas susu sapi perah Frisian Holstein pada akhir musim kemarau panjang di Balai Pengembangan Ternak Sapi Perah dan Hijauan Makanan Ternak (BPT-SP HMT) Cikole, Lembang, Bandung. Penentuan sampel menggunakan metode purposive sampling. Parameter mikroklimat yang diamati antara lain adalah temperatur lingkungan, kelembaban relatif, kecepatan angin, radiasi sinar matahari dalam kandang dan Temperature-Humidity Index (THI). Respon fisiologis yang diamati meliputi suhu rektal, suhu kulit, suhu tubuh, frekuensi respirasi dan denyut jantung. Nilai rerata THI (73.93±5.51) menunjukkan sapi perah berada dalam kondisi stress ringan. Nilai rerata dari suhu rektal, suhu kulit, suhu tubuh, frekuensi respirasi dan denyut jantung secara berurutan 37.94±0.20°C; 32.15±1.25°C; 37.13±0.32°C; 39.13 ±3.00 dan 79.74±6.19. Nilai rerata persentase bahan kering, lemak dan protein susu secara berurutan 10,19 ± 0,72, 2,14 ± 0,38 dan 2,50 ± 0,32. Temperatur lingkungan yang tinggi mempengaruhi respon fisiologis antara lain peningkatan denyut jantung yang lebih tinggi dari normal dan kualitas susu yang lebih rendah. (Physiological responses and milk qualities of holstein friesian during long dry season at high altitude)ABSTRACT. The objectives of this study were to evaluate physiological responses and milk qualities of dairy cows in Balai Pengembangan Ternak Sapi Perah dan Hijauan Makanan Ternak (BPT-SP HMT) Cikole West Bandung at the end of long dry season. Samples were determined by using purposive sampling method. Microclimate parameters were included ambient temperature, relative humidity, air velocity, solar radiation and temperature-humidity index (THI). Physiological responses consisted of rectal temperature, skin temperature, body temperature, respiration rate and pulse rate. The mean value of THI (73.93±5.51) showed that dairy cows suffered by heat stress. The mean value of rectal temperature, skin temperature, body temperature, respiration rate and pulse rate were 37.94±0.20°C; 32.15±1.25°C; 37.13±0.32°C; 39.13±3.00 and 79.74±6.19 consecutively. The average percentage value of dry matter, fat and protein content in milk were 10.19±0.72, 2.14±0.38 and 2.50±0.32. High ambient temperature and low relative humidity affected physiological responses such as pulse rate that higher than normal, and lower milk yield.

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Relation between some climate parameters inside and outside the stable in the course of the year

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun200957040125 ◽

2009 ◽

Vol 57 (4) ◽

pp. 125-132 ◽

Cited By ~ 6

Author(s):

Lucie Walterová ◽

Lenka Šarovská ◽

Daniel Falta ◽

Gustav Chládek

Keyword(s):

Relative Humidity ◽

Outdoor Temperature ◽

Climate Parameters ◽

Temperature Humidity Index ◽

Humidity Index ◽

Autumn And Winter ◽

Daily Relative Humidity ◽

Indoor And Outdoor

The objective of the present study was to evaluate the relation between some climate parameters inside and outside the stable in the course of the year. Investigations were carried out from 1 July 2007 to 30 June 2008 at the School Farm in Žabčice. We monitored the following micro-climate parameters: temperature (°C), relative humidity (%) and the temperature-humidity index (THI) inside and outside the stable. We used the statistical programme UNISTAT version 5.1.11 to calculate the average monthly temperatures, relative humidity and the THI inside and outside the stable.Measurements carried out throughout the whole year revealed that the average daily outdoor temperature was always lower than the temperature monitored inside the stable. The differences between the outdoor and indoor temperatures were more marked in winter; in summer the differences were considerably lower. The coefficient correlations confirmed this finding; the temperatures were the highest in July and the lowest in autumn and winter. The same results and tendencies were monitored in terms of the average daily THI values. Much like the temperatures also the differences in high average daily values of relative humidity between the outside and inside environment of the stable were lower. Since the relative humidity was higher in winter than in summer the differences between the indoor and outdoor stable values were more marked in summer than in winter. In contrast to the temperature and THI, in one half of the cases the average daily relative humidity was higher outside the stable than inside and vice versa.

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Microclimate in silvipastoral systems with eucalyptus in rank with different heights

Revista Brasileira de Zootecnia ◽

10.1590/s1516-35982010000300030 ◽

2010 ◽

Vol 39 (3) ◽

pp. 685-694 ◽

Cited By ~ 11

Author(s):

Wander de Souza ◽

Orlando Rus Barbosa ◽

Jair de Araújo Marques ◽

Marco Aurélio Teixeira Costa ◽

Eliane Gasparino ◽

...

Keyword(s):

Wind Speed ◽

Relative Humidity ◽

Air Temperature ◽

Thermal Load ◽

Heat Load ◽

Temperature Humidity Index ◽

Heat Load Index ◽

Humidity Index ◽

Globe Temperature ◽

Black Globe Temperature

The aim of this work was to verify if the presence of trees and its height in formed silvipastoral systems with eucalyptus planted in rank can modify the microclimate and improve the environment for bovine raising during the day in summer. It was evaluated the microclimate of the environment in formed silvipastoral systems in rank of eucalyptus with 8 m, 18 m and 28 meters of height, compared to a system no shade in the summer. The experimental design was a split plot with six hour time in sub parcels. The systems are made up of parcels and the months as block in four replications and the interaction hour × system. The air temperature, black globe temperature, relative humidity and wind speed were observed to create the following indexes for thermal comfort: temperature-humidity index; black globe-humidity index; heat load index and the radiant thermal load. Excepted for the relative humidity, there was interaction for time × system for all variables and indexes. Interaction occurred for: air temperature at 10 a.m. and 6 p.m.; wind speed from 8 a.m. to 4 p.m.; temperature humidity index at 10 a.m. and 12 p.m.; black globe temperature, black globe humidity index, heat load index, and radiant thermal load at all the hours. During the summer, the system with shade of 28 m trees had the lowest average of black globe temperature; wind speed; black globe humidity index; radiant thermal load index; and heat load index. There was a reduction of wind speed average in systems 8 m, 18 m and 28 m trees in, respectively, 20.7; 50.0 and 48.0% in relation to no shade system; however it was not proportional to the height, with influence of the rank porosity and pantries height. Nevertheless, for radiant thermal load index the reduction was proportional to the height of the trees with 10.24; 12.49 and 20.76%, respectively, for 8 m, 18 m and 28 meters of height. There was a reduction of the thermal stress in the environment due to the presence of trees, being the heat load index thermal the index that better demonstrated the effect, despite of not being proportional to the rank height.

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