Small animal closed backflow type respiratory metabolism heat measuring system and method

Abstract

The invention discloses a closed backflow type respiratory metabolism heat measuring system and method for small animals, the system comprises a breathing cabin, a temperature and humidity control device, an oxygen supply device and a carbon dioxide absorption and harmful gas removal device, and the precise measurement of the daily unit metabolism weight heat production of the small animals is realized. The air pressure difference inside and outside the cabin body is accurately calculated and controlled by adopting an iterative algorithm, the amount of oxygen entering the cabin body is controlled by combining the oxygen concentration in the cabin body, the oxygen consumption is measured in real time, the volume of carbon dioxide generated by digestion and metabolism of test animals is collected and measured, and the average weight of the test animals is obtained in real time. According to the average daily oxygen consumption, the average daily carbon dioxide output and the average weight in the official determination stage, calculating the heat production per unit metabolism weight per day.

Description

technical field [0001] The invention relates to a closed-flow respiration-metabolism heat-measuring system and method for small animals with a body weight of not more than 10 kilograms, belonging to the technical field of livestock and poultry energy material metabolism. Background technique [0002] The digestion and metabolism of energy substances (protein, fat and carbohydrate) by livestock and poultry has always been the most basic research field in animal nutrition and feed science. In livestock and poultry breeding, the cost of dietary energy accounts for more than 60% of the total formula cost. Therefore, accurate determination of the effective energy value of the diet is important for determining the reasonable energy requirements of livestock and poultry, improving the conversion rate of diet, and improving livestock and poultry. Product quality and production efficiency, formulation of feeding standards and scientific formulation of rations all have indispensable t...

AI Technical Summary

Problems solved by technology

Although the system does not need to be equipped with expensive gas analysis instruments and has the advantage of a low failure rate, it has obvious defects in the following six aspects: 1) Due to the delay in the pressure response in the cabin after oxygen enters the cabin, through real-time pressure The difference is difficult to control the constant pressure and oxygen concentration in the cabin, resulting in inaccurate oxygen consumption data; 2) It is difficult to effectively control the high humidity in the cabin caused by animal breathing through physical desiccants such as silica gel and calcium chloride. On the one hand, it leads to shortness of breath of the animals, which leads to their abnormal health; Poisoning, or even death; 4) Lack of real-time measurement of the body weight of the experimental animals, and lack of accurate data on the average body weight of animals representing the experimental period in the calculation of oxygen consumption and heat production per unit metabolic body weight, resulting in large errors; 5) The degree of intelligence in the measurement process is low, and manual switching is required from test preparation, formal measurement, and end of measurement, lacking real-time acquisition and calculation of data; 6) The measurement efficiency is low, and the control error is large due to the low degree of automation, entering a stable measurement period The time is longer, usually 72h is used as a measurement cycle

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