Effects of feeding regimen on weight gain, semen characteristics, libido, and lameness in 170- to 250-kilogram Duroc boars
作者： C. Wang , J. L. Li , H. K. Wei , Y. F. Zhou , J. J. Tan
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摘要: A 2-period field trial was conducted to determine the effects of feeding regimen on weight gain, semen characteristics, libido, and lameness in 170- 200-kg (period 1) 200- 250-kg 2) boars. Sixty-one Duroc boars were allotted 1 3 dietary treatments 15 g/d fish oil also provided for each experimental boar, maintain n-6:n-3 intake ratio at approximately 6.1:1. The energy intakes treatment groups controlled by basing feed a corn-soybean meal-based diet (3.11 Mcal/kg ME) create: low group (L, = 20, 7.3 Mcal/d ME), medium (M, 7.7 3) high (H, 21, 8.3 period 1. Feed then increased 7.6, 8.2, 8.6 ME groups, respectively, 2. During 28-wk period, boar testis volume, toe measurements, claw lesions, examined, number culled recorded calculate culling rate. Although there no differences sperm concentration, motility, percentage abnormal sperm, lesion scores differed among ( > 0.05), ADG significantly with increase between 2 periods 0.05). Nonetheless, H took more time mount collection dummy produce an ejaculate and, particular, showed greater than L M < Therefore, (energy 8.2 454.5 375.3 periods, respectively) improved total functional number, meanwhile decreased occurrence
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