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引言干草留茬中枯草比例和茎秆比例较高,叶的比例较低。反刍动物会优先选择鲜嫩的绿叶,但大量枯草和茎秆会减弱这种特性,并能降低家畜的生产能力(Scales,1981)。尽管正确地安装和操作旋转割草机能使留茬很低,但为了保护机器,实践中,留茬一般为8～12厘米,把残茬恢复成叶量丰富的草地需要时间,但迅速恢复草地是重要的。特
Introduction The proportion of hay and stalks in hay stubble is higher and the proportion of leaves is lower. Ruminants will prefer fresh green leaves, but a large number of hay and stems will diminish this trait and reduce livestock productivity (Scales, 1981). Although rotating lawn mowers can be installed and operated properly to keep the stubble low, in practice, the stubble is generally 8 to 12 cm in length and it can take time to recover the stubble into a leafy grassland but quickly recover the grass is important. special