Improvement effect by trehalose to the commercial-egg production of 'Aomori shamo-rock' under the summer heat environment
2015
Nozuki, H. (Shimokita District Administration Office, Department of Agriculture, Forestry and Fisheries, Mutsu Livestock Hygiene Service Center, Mutsu (Japan)) | Obara, T. | Arai, S. | Mukai, K.
Supply of chicken meat with higher demand in winter season is affected by the production of commercial fertilized eggs for 'Aomori shamo-rock' under the environmental temperature in summer season. Effect of 1% trehalose to the mixed feed on egg production performance and hatchability was examined using the parent chickens which has been cross-breeding with female 'early feathering barred plymouth rock' and male 'barred shamo'. The test group was trehalose addition group and non-addition group as a control, test period was 292 days from 140 (April, 2010) days of age up to 432 (January, 2011) days of age. As a result, as compared with the control group, the percentage of normal eggs in the total number of spawning during the test period in the trehalose group was significantly higher and it was remarkable from summer through late spawning. In addition, in the hatchability test of the commercial-eggs stored for two weeks, the fertilization rate and the hatching rate at high temperature in trehalose group was significantly higher and the tendency was also observed in long-term storage of them in the trehalose group compared with that of the control group. Therefore, these findings suggest that supplementation of trehalose to the mixed feed leads to improvement of commercial-egg productivity, egg quality and maintenance of hatchability.
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