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引言培育牧草以预防或减少牲畜青草搐搦症的发生是很复杂的,因为同该病相关的许多问题尚未能解决。由于青草搐搦症常与血液中镁的含量低相关,这就使人们将其当成为简单的矿物质缺乏症。然而,并非所有的血中镁低的动物都会死于青草搐搦症。故有必要查明血镁含量过低何以会引起青草搐搦症。因为镁可能被固定在叶绿素中或为硅酸盐所包裹,以致不能被动物所有效利用。植物产生
INTRODUCTION Breeding forages to prevent or reduce the incidence of tetany in livestock is complicated by the fact that many of the problems associated with the disease have yet to be resolved. Because of the often associated with low levels of magnesium in the blood, it is considered as a simple mineral deficiency. However, not all animals with low magnesium in the blood die of cyanosis. It is necessary to find out why the blood magnesium level is too low, causing tetany. Because magnesium may be immobilized in chlorophyll or surrounded by silicate, it can not be used efficiently by the animal. Plants produce