The invention discloses a yak maintenance and growth net
protein demand amount calculation method, and relates to the technical field of
livestock breeding, and the method comprises the following steps: obtaining basic data of adult yaks through experiments, calculating the maintenance net
protein demand amount, and building a growth net
protein demand amount model; according to the method, the gradient feeding test, the
nitrogen metabolism test and the comparative slaughtering test are integrated, protein
metabolism and
body composition first-hand data of the
plateau adult yaks are directly obtained, an accurate
mathematical model is established according to the data, the calculation result directly reflects the real physiological needs of the yaks, scientificity is remarkably enhanced, and based on the model, the real physiological needs of the yaks are directly reflected. By means of the method, the net protein requirement amount for maintaining the net protein and the net protein requirement amount for growth required by
target weight gain of the yaks of any weight can be accurately calculated, the feed utilization efficiency can be greatly improved, the feeding cost can be reduced,
nutrient emission can be reduced, and the growth performance of the yaks can be optimized.