Method for calculating body temperature of cattle by skin temperature

Abstract

The present invention provides a method for calculating the body temperature of cattle by skin temperature. The method comprises steps of: calculating a rectal temperature of the cattle by using a mixed linear model as shown in model 1 referring to Y=a+X0b0+Xsbs+Xtbt+Xibi+e, wherein Y is the rectal temperature, X0 is the skin temperature, Xs is a season design matrix, bs is a non-random parameter vector of Xs, Xt is a time design matrix, b0 is a regression coefficient of X0, bt is a non-random parameter vector of Xt, Xi is an individual design matrix, bi is a random parameter vector of Xi, a represents the intercept, and e is a random vector error. According to the method, in the regression analysis of the rectal temperature by employing the skin temperature, the seasonal factor and the time point factor are taken as the fixed effects, and the individual factor is taken as the random effect. The skin temperature after correction by employing the model is compared with the actual rectal temperature, the average of the absolute numbers of differences between the correction temperatures and the rectal temperature reaches 0.104 DEG C, and the absolute values of 90% of data differences are not higher than 0.2 DEG C, and the ideal effect is achieved.

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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