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Rotational grazing of dairy cows : effect of grazing intervals on animal and grass production

机译:奶牛轮流放牧:放牧间隔对动植物生产的影响

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摘要

With rotational grazing, short grazing intervals allow to feed grass of good value : this method enhances animal performance but reduces grass production. Inversely, according to Frame and Hunt, (1971, J Br Grassld Soc, 2, 163-171) and Binnie and Chestnutt (1991, Grass and Forage Sci, 46, 343-350), longer intervals improve grass production but reduce grass value and quality. Furthermore, two advantages could be obtained with longer intervals : - a larger amount of grass available for grazing in summer, which could lower the acreage of grass to be cut for silage in spring; - a longer period of grazing without supplement of forage, but with possibly a lower milk production.
机译:通过轮牧,较短的放牧间隔可以饲喂高价值的草:这种方法增强了动物的性能,但减少了草的产量。相反,根据Frame和Hunt(1971年,J Br Grassld Soc,第2卷,第163-171页)和Binnie and Chestnutt(1991年,Grass and Forage Sci,第46卷,343-350页),间隔时间越长,草产量越高,但草价值却越低。和质量。此外,在较长的间隔内可以获得两个优点:-夏季可用于放牧的草量更多,这可能会降低春季为青贮饲料而割草的面积; -放牧时间较长,不补充牧草,但牛奶产量可能较低。

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