Effects of different grain sizes of corn on production performance,egg quality,and plasma biochemical indicators of pigeons
The aim of this experiment was to investigate the effects of different particle sizes of corn on the production performance,egg quality,and plasma biochemical indicators of Tarim pigeons.120 pairs of 24 month old Tarim pigeons with similar body weight were selected for the experiment and randomly divided into 4 groups,with 30 pairs in each group.Each group of pigeons was fed with a corresponding mixed diet consisting of 10 mm(BC group),6 mm(SC group),4 mm(CC group),2 mm(FC group)of corn with different particle sizes,as well as wheat,sorghum,and peas.The pre feeding period was 3 days,and the experimental period was 70 days.The results showed that the average daily feed intake of pigeons decreased with the decrease of corn kernel size.The total feed intake and average daily feed intake of group BC were significantly higher than those of group CC and group FC(P＜0.05),the total feed intake was increased by 10.5％and 11.6％,the average daily feed intake was increased by 10.35％and 11.61％;The egg production rate of the BC group was significantly higher than that of the CC and FC groups(P＜0.01),which were 63.0％and 69.2％higher,respectively.With the decrease of corn kernel size,the pigeon egg weight decreased,and the protein weight of BC group was significantly higher than that of CC group(P＜0.05),9.3％higher.The corn kernel size had no significant difference in plasma nitrogen metabolism level,blood glucose concentration,blood lipid concentration,and activities of glutamic oxaloacetic transaminase and alanine transaminase,but the total bilirubin content in BC group was significantly higher than that in CC group(P＜0.01),54％higher;The activity of alkaline phosphatase(ALP)in SC group was 50％higher than that in FC group.In conclusion that 10 mm corn mixed diet had a positive promoting effect on the production performance of Tarim pigeons,indicated that corn with this particle size was more suitable for use in Tarim pigeon breeding.
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