Method for calculating body temperature of cattle by skin temperature

Abstract

The present invention provides a method for calculating bovine body temperature through bovine body surface temperature, including calculating bovine rectal temperature using a mixed linear model as shown in model 1, model 1: Y=a+X 0 b 0 +X s b s +X t b t +X i b i +e; where Y is the rectal temperature, X 0 is the body surface temperature, X s Design matrix for seasons, b s for X s The non-random parameter vector of ; X t Design matrix for time, b 0 for X 0 The regression coefficient of , b t for X t The non-random parameter vector of ; X i Design matrix for individuals, b i for X i The random parameter vector of ; a represents the intercept, and e is the random vector error. In the present invention, in the regression analysis of body surface temperature and rectal temperature, seasonal factors and time point factors are used as fixed effects, and individual factors are used as random effects. Comparing the corrected body surface temperature with the actual rectal temperature by using the model, the average absolute value of the difference between the corrected temperature and the rectal temperature reached 0.104°C, and the absolute value of the 90% data difference did not exceed 0.2.

Description

[0001] This application claims priority to Chinese patent application 201510383183.4 filed on July 2, 2015, which is incorporated herein by reference. technical field [0002] The invention relates to the field of animal husbandry, in particular to a method for calculating the body temperature of a cow through the body surface temperature of the cow. Background technique [0003] Body temperature is an important physiological index of the body. Under normal circumstances, the body temperature of cattle will be within a relatively constant range and change regularly with changes in physiological activities (Cooper-Prado et al.2011), such as estrus, ovulation, pregnancy and childbirth Wait. However, in the practice of cattle temperature detection, most cattle farms still use mercury thermometers for rectal temperature measurement. This method is inefficient in temperature measurement, which can easily cause cross-spreading of dairy cow diseases, and cannot accurately obtain th...

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Problems solved by technology

[0004] Although the above methods have achieved the purpose of temperature measurement to varying degrees, both rumen pills and subcutaneous implantation will cause certain damage to dairy cows, and neither meets animal welfare requirements

In recent years, infrared temperature measurement has been continuously used to measure pig body surface temperature, but the results are not very satisfactory and cannot guide production applications

The development of modern medicine has promoted the in-depth research on the change law of human body surface temperature, and has achieved certain phased results. However, the body surface of cattle is more hairy, and there are fewer hairless and exposed body surface parts, and the detection is very difficult. Convenience, there are few research reports on body surface temperature, and only a few studies have been seen on the impact of heat stress on dairy cow body surface temperature (Wen Yali, 2011) and the relationship between surface temperature changes in the udder area and mastitis (Metzner et al.2014), These results only revealed the relationship between some environmental factors and the temperature of individual parts of the body surface and some pathological phenomena, but did not reveal the relationship between body surface temperature and body temperature (rectal temperature) and its changing law. In-depth systematic research

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