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首页> 外文期刊>Arkansas Agricultural Experiment Station: Research Series >Using Orchardgrass and Endophyte-Free Fescue Versus Endophyte-Infected Fescue Overseeded on Bermudagrass for Cow Herds: Final Four-Year Summary of Cattle Performance
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Using Orchardgrass and Endophyte-Free Fescue Versus Endophyte-Infected Fescue Overseeded on Bermudagrass for Cow Herds: Final Four-Year Summary of Cattle Performance

机译：使用果园和无内生的羊茅与内生菌感染的羊茅在牛茅上的牛草混养：牛性能的最后四年总结

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摘要

A trial was initiated on January 11, 2000 to 1) evaluate endophyte-free tall fescue (FF; Festuca arundinacea Schreb.) or orchard-grass (OG; Dactylis glomerata L.) overseeded into dormant common bermudagrass [Cynodon dactylon (L.) Pers.] sods for spring-calving cows, and 2) compare these forage systems with mixtures of endophyte-infected tall fescue (IF) and bermudagrass that are observed commonly throughout the southern Ozark region. Two management systems were evaluated in an effort to help the OG and FF forages persist; these include rotations to new paddocks twice weekly (2xW) or twice monthly (2xM). Actual weaning weight, adjusted 205-d weaning weight, total gain from birth to weaning, and average daily gain from birth to weaning were greater (P< 0.083) for calves on non-toxic forages (FF or OG) than for those on IF pastures. Calves raised on OG-2xW, OG-2xM, and FF-2xM exhibited a 47 to 59-lb advantage in actual weaning weight over those on IF pastures. It is not clear why calves raised on FF-2xW pastures exhibited only a 21-lb numerical advantage. Cows grazing OG and FF pastures exhibited higher (P < 0.035) body weights and body condition scores (BCS) at calving, breeding, and weaning than cows grazing IF pastures; however. BCS for cows grazing IF pastures remained within an acceptable range (6.1 to 6.7). Cow-calf performance was improved marginally by including non-toxic, perennial cool-season grasses in bermudagrass pastures, but establishment costs and additional management requirements, relative to those necessary for mixtures of IF and bermudagrass, may limit the acceptability of this approach.
机译：从2000年1月11日开始进行一项试验，以评估1）无内生菌的高羊茅（FF; Festuca arundinacea Schreb。）或果园草（OG; Dactylis glomerata L.）播种到休眠的普通百慕大草中的情况。 Pers。]用于春季产犊牛的草皮，和2）将这些饲草系统与内生植物感染的高羊茅（IF）和百慕大草的混合物进行了比较，这些混合物在整个Ozark南部地区常见。对两个管理系统进行了评估，以帮助OG和FF的饲料持续存在;其中包括每周两次（2xW）或每月两次（2xM）轮换到新的牧场。无毒饲料（FF或OG）犊牛的实际断奶体重，调整后的205天断奶体重，从出生到断奶的总增重以及从出生到断奶的平均日增重（P <0.083）大于IF牧场。与IF牧场相比，在OG-2xW，OG-2xM和FF-2xM上饲养的犊牛的实际断奶重量显示出47到59磅的优势。尚不清楚为什么在FF-2xW牧场上饲养的犊牛仅表现出21磅的数值优势。放牧OG和FF牧场的母牛在犊牛，繁殖和断奶时的体重和身体状况得分（BCS）比放牧IF牧场的母牛更高（P <0.035）。然而。牧场放牧的奶牛的BCS仍在可接受范围内（6.1到6.7）。通过在百慕大草牧场中加入无毒的多年生凉季草，母牛的犊牛性能得到了轻微改善，但是相对于IF和百慕大草混合物所需的建立成本和额外的管理要求，可能会限制这种方法的可接受性。

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