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Newly hatched goslings test object, relatively, in the case of free drinking water, open water time gosling yolk sac nutrients absorption and utilization, and the impact of growth and development, as well as 10-week-old goslings body sizes and slaughter performance, to determine the goslings suitable open food time, rich yolk sac of goslings nutrition research and to provide a reference for the goose farming. Health the test select hatched time within 4 h lively, consistent weight 480 Yangzhou goose, male female. Four processing points according to the time of the open water, open water hatched after 12 h, 24 h, 36 h and 48 h, respectively set each handle four replicates, each repeated 30 geese, male female. For 12 h, 36 h, 60 h, 108 h, 156 h, 14 d, 21 d, 28 d and 70 d samples, each repeated two randomly selected 1 male and 1 female, n = 8, weighing after blood collection, anatomy. Separation of the serum was measured hormone T3; 156 when the age of the removal of the yolk sac and determination of the early moisture, protein and fat content; take the internal organs; small intestine do paraffin sections for histological observation, measured villus height, crypt depth, villus width and wall thickness; trial period of daily record feed consumption, weighing every weekend. The results show that: 1, each group is not the same age yolk sac weight, yolk sac in early moisture, protein and fat content, the differences were not significant (P gt; 0.05). 48 h open food group yolk sac weight, yolk sac protein and fat content are greater than the remaining three groups the trend change of moisture in the yolk sac and other nutrients contrary, 48 h open food group early moisture less than the trend of the other three groups, and 24 h on food groups yolk sac absorption rate greater than the other three groups. Absorption of nutrients in the yolk sac are mainly concentrated in the age when 12-60, 156 age when 98% of the yolk sac is absorbed; 24 h to open food protein of 85.50% and 85.16% of the fat in the 12-60 age is absorbed within 48 h open food group, only 74.39% of the protein and 75.71% of the fat is absorbed. Changes in protein and fat in the yolk sac found that the fat content in each when age (except 12:00 instar) were extremely significantly higher than the protein content (P lt; 0.01). 2,36 age when unopened food open water 36 h and 48 h to open a food group weighed less than the weight at age 12 o'clock, the weight began to increase in the open water. 0-4 w 48 h to open food group weight less than the other three groups. The general trend, 48 h to open food group digestive organs and other internal organs (heart, liver, pancreas) weight are presented below the trend of the other three groups; spleen index as a whole appears to peak first increased to 14 days of age and then decline trends, the general trend, the basic 24-h to open food group presents the biggest trends; bursa index of each group time to reach peak inconsistent 12 h to open food group for 14 days of age, 24 h food-opening group of 7-day-old 36 h to open food group and 48 h open food group at 21 days of age; With the age increasing serum T3 concentration wavy change to 4 w 12 h on food and 48 h open food group food group and 36 h 24h open open food group. 3, open food at different times in each group, small intestine and bowel villus height appeared 36 when age is less than 12 age 36 when the age wave growth trend after the show; groups crypt depth in the 12-108 When age, regardless of open water or not are increasing, and in the increase in the time period faster decline after TSE 108, the TSE 156 starts rising; jejunal and ileal villus width as when age increases increase, increase in 1 w faster; show wave-like change of the wall thickness, increase speed more moderate. General trend, 48 h open food group villus height, crypt depth, villus width and wall thickness of the development to be later than the other three groups, which hatched 48 h after the food is not conducive to the development of intestinal tissue morphology , which is not conducive to the best play of the weight gain and immunity performance. 4, open food at different times of each group in the 5-10 weeks of age, body weight difference is not significant (P gt; 0.05), but growth accelerated to a later stage of growth, 10 weeks, 48 ??h the open food group is not rendered minimum trends. Feed consumption only 8 w 24 h on food group was significantly less than 48 h on the phenomenon of the food group (P lt; 0.05), and the rest of the time difference was not significant (P gt; 0.05), 9 weeks of age, 48 h on the feed consumption of the food group to reach the maximum. 10 weeks, visceral organ weight difference is not significant (P lt; 0.05), and there is no clear trend, and thus that the open water of the 10-week-old goslings small intestine morphology had no significant effect. The open water of the 10-week-old goslings slaughter performance significantly affect (P lt; 0.05), 48 h open food group the eviscerated rate and eviscerated yield to open food group was significantly less than 24 h and 36 h to open a food group (P lt; 0.05), and abdominal fat percentage significantly greater than 24 h to open food group (P lt; 0.05). 10-week-old goslings body length, keel length and tibia length difference is not significant (P gt; 0.05), while the chest width 24 h to open a food group was significantly greater than 12 h on food and 48 h open food group (P lt; 0.05), from the overall trend to see open water 24 h and 36 h to open food group body size indexes greater than 12 h on food and 48 h open food group. Integrated in this experiment showed that the absorption of nutrients in the yolk sac of 24 h to open food group is the fastest and the slowest 48 h open food group absorption. The open water on the growth of goslings early developmental effects in the test proposed open water for 24-36 h after hatching.
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