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《Southwest China Journal of Agricultural Sciences》 1989-01
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NUTRITION NEED OF LAYING HENS IN DIFFERENT SEASONS Ⅱ Examination of Need of Metabolic Energy through comparative Slaughter Experiment

Li Shouzhang Huang Minghua Song Zhengwen He Jiefeng Li Jianguo (Chongqing Institute of Animal Hasbandry & Veterinary Science)  
Through the comparative slaughter experiment, the need of energy of laying hens of variety Rose was studied in different seasons. In the experiment, the warm season was defined a period of time during which the mean daily air temperature was higher than 24℃, and when the mean daily temperature was lower than 14℃, it was defined as the cold season. The hens were divided into 3 groups, among which every hen had similar productivity, one of which was defined as the zero group. The experiment was conducted in both the warm and the cold seasons. When the experiment was going to end, the group of hens with better productivity was selected from the other two groups and was slaughtered. The chemical analysis was carried out with the slaughtered bodies and the products. The culculated results showed that there was a remarkable difference in needs of metabolic energy of hens during the warm and the cold seasons. During the cold season, when the laying rate was lower than 65%, a laying hen needed metabolic energy of 265-290 kilocaloie, when the laying rate was 65-80%, a hen needed metabolic energy of 290-310 kilo-calorie a day, when the laying rate was higher than 80%, the daily need of metabolic energy per hen would increase to 310-325 kilocalorie. But during the warm season, the corresponding daily needs of metabolic energy were 200-225, 225-240 and 240-250 kilocalorie respectively for above laying rates.
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Chinese Journal Full-text Database 2 Hits
1 Li Shouzhang Huang Minghua Song Zhengwen He Jiefeng Li Jianguo (Chongqing Institute of Animal Husbandry & Veterinary Science);NUTRITIONAL DEMAND FOR LAYING HENS IN DIFFERENT SEASON Ⅲ.Demand of Coarse Protein for Laying Hens in Cold or Warm Season Determined by Nitrogen Balance Experiment[J];Southwest China Journal of Agricultural Sciences;1989-02
2 Li Shouzhang Huang Minghua Song Zhengwen He Jiefeng Li Jianguo ( Chongqing Institute of Animal Husdandry and Veterinary, Chongqing );RESEARCH ON NUTRITIVE NEED OF LAYING HENS IN DIFFERENT SEASONS IY Researcg on Feeding Standard for the Laying Hens in Different Seasons[J];Southwest China Journal of Agricultural Sciences;1989-03
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