The invention discloses a method for predicting
net energy requirements of piglets with different
weaning weights, and belongs to the field of
animal nutrition and feed science. According to the method, a factorial method is adopted, and the
net energy demand amount of piglets is divided into a maintenance
net energy demand amount, a
protein deposition net
energy demand amount and a fat deposition net
energy demand amount. The method comprises the following steps: collecting data such as piglet body components,
body weight, feed intake and the like, establishing a relation model of
body weight, body
protein and body fat
deposition rate of 5-25kg piglets, determining energy contents of body
protein and body fat, establishing a relation model of net
energy demand,
body weight, protein and fat deposition energy, and distinguishing model differences of piglets with high and low
weaning weight. And dynamically predicting the net energy demand amount and the optimal feed net energy concentration in combination with the
growth curve and the feed intake curve. According to the method, the feed utilization efficiency is improved, the cost is reduced, and a basis is provided for accurate feeding.