Method for estimating the weight of gilts

Abstract

The invention discloses a method for estimating the body weight of a gilt, which comprises acquiring morphological index data of the gilt, and the morphological index data include bust, age, backfat thickness at point P2, body length, hip height and leg width; According to the morphological index data of the gilts, the weight of the gilts is calculated by using the regression equation constructed to estimate the weight of the gilts. The regression equation is: weight = -140.659 + 1.298 x bust - 0.019 x age - 0.034 x P2 point Backfat thickness + 0.408 × body length + 0.285 × hip height + 1.220 × leg width; among them, the R of the regression equation 2 =0.929, P<0.001. This program can accurately estimate the body weight of gilts through the combination of morphological index data and regression equation.

Description

technical field [0001] The invention relates to a technology for monitoring animal growth, in particular to a method for estimating the body weight of a gilt. Background technique [0002] Based on the significant benefits of intensive farming and the expansion of the market demand for livestock products, my country's breeding industry is developing rapidly in the direction of intensive management. At present, the scale level in my country has reached more than 60%, and the proportion of domestic scale breeding of more than 500 pigs per year has accounted for 45%. However, the current level of pig production in my country is still relatively backward, and it is very common for gilts to not come into heat or to come into heat late. Provide precise nutritional supply to gilts, resulting in overfat or underweight gilts, reducing the estrus rate of gilts. [0003] In large-scale pig farms, it is difficult to monitor the weight of gilts in real time. First, due to the large numb...

AI Technical Summary

Problems solved by technology

[0005] At present, in production practice, the weight of sows is measured by weighing, which is highly accurate, but for large-scale pig farms, weighing each sow individually will greatly increase the workload of employees During the process, it is easy to cause stress response to the sow, which greatly increases the labor intensity

The sow weight measuring ruler is a simple tool for estimating the weight of sows, but the weight measuring ruler only estimates the sow's weight by measuring the chest circumference of the sow. The reference index parameters are single, the accuracy is low, and the measurement results are difficult. Affected by factors such as the sow's feed intake and body position

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