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Effect of extended storage on egg quality, embryo mortality and hatchability in FUNAAB-ɑ chickens was determined. Hatchable eggs (n = 288; weighing 53.2 ± 4.67 g) collected from a flock of FUNAAB-ɑ layer breeder hens aged 32 weeks were stored in egg tray with broad end up under 16 ± 1.5°C for either 0, 4, 8, 12, 16 or 20 d. Before incubation, eight eggs from each group were evaluated for internal and external quality traits. Remaining eggs were set in an incubator and transferred into hatcher on embryonic day 18. Data collected were subjected to one-way analysis of variance. Egg weight loss (EWL; p < .001), surface area (p < .001), yolk diameter (p < .001), inner and outer blastoderm diameters (p < .05) and dead in germ (DIG; p < .001) increased with storage duration while yolk height (p < .001), yolk index (p < .001), albumen weight (p < .05), albumen height (p < .05), albumen index (p < .01), Haugh's unit (HU; p < .05), fertility (p < .001), hatchability of set (HATCHS; p < .001) and fertile eggs (p < .05) decreased. Weight losses of 0, 1.2, 2.2, 3.4, 4.6 and 6.1% were recorded in egg stored for 0, 4, 8, 12, 16 and 20 days respectively. Eggs stored beyond 8 days exhibited higher DIG and lower HATCHS. Shell percentage in 4 days storage (11.4%) was lower (p < .05) than in 16 days storage (13.4%). Shell thickness was similar in eggs stored for 0 to 12 days, but 8 days storage (0.60 mm) had thinner (p < .01) shell than day 16 (0.71 mm) and day 20 (0.73 mm) storage. Internal quality unit (IQU) was higher (p < .05) in fresh eggs (180.4) than in 12 days (167.8) and 20 days (167.8) stored eggs. Extended storage of FUNAAB-ɑ eggs caused EWL, surface area shrinkage, lowered HU and IQU, loss of yolk and albumen quality, increased blastoderm diameters and DIG, and decreased egg fertility and HATCHS from day 8 forward. Storing FUNAAB-ɑ eggs beyond 8 days reduced quality parameters; therefore, other mitigating factors are recommended when storing beyond 8 days.  相似文献   

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畜牧业的发展,给环境带来的影响越来越严重。过去畜禽粪尿用作肥料供作物生长,靠自然界的自净能力消除,但是现在大量的、大规模的现代化养殖场所产生的粪尿远远超过了自然界的自净能力。这些废弃物侵蚀土壤、污染水质,特别是这些有机质在微生物的作用下降解产生大量的臭气,这些  相似文献   

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正母猪品质好,能保证所产的一窝仔猪品质好;公猪的品质好,通过推广人工授精技术,每年可为几百头的能繁母猪配种,生产更多优质仔猪。强调了种猪选留的重要性。另有农谚"母管一窝,公管一坡"。  相似文献   

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<正>本文对7月7日我国部分地区的肉鸡苗市场进行了分析,供大家参考。河南:饲料价格还在涨,养鸡户观望增多安阳地区鸡苗价格1.00~1.50元/羽;焦作地区苗鸡价格1.20~1.60元/羽;新乡地区苗鸡价格1.00~1.80元/羽;商丘地区苗鸡价格1.00~1.70元/羽。  相似文献   

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