State Key Laboratory of Animal Nutrition Ministry of Agriculture and Rural Affairs Feed Industry Centre China Agricultural University Beijing 100193 China;
State Key Laboratory of Animal Nutrition Ministry of Agriculture and Rural Affairs Feed Industry Centre China Agricultural University Beijing 100193 China;
State Key Laboratory of Animal Nutrition Ministry of Agriculture and Rural Affairs Feed Industry Centre China Agricultural University Beijing 100193 China;
Caloric efficiency; Corn; Net energy; Pig; Soybean meal;