1984至1988年,研究了冷季苜蓿和红豆草抗冻性及体内某些营养物质变化。发现温度对牧草抗冻性发展有决定性的效应。秋季抗冻锻炼开始后,一定范围内,锻炼温度越低,抗冻性越强。可溶性糖、淀粉的含量与抗冻性有一定关系,但并不都是直接相关。抗冻锻炼期间可溶性蛋白增加量与抗冻性增强有关。从冬季一直延续到春季,红豆草均可能发生冻害,但腐烂和死亡则主要在春季才表现出来。 From 1984 to 1988, the frost resistance of alfalfa and sainfoin in cold season and the changes of some nutrients in the body were studied. It was found that the temperature had a decisive effect on the development of forage frost resistance. Fall antifreeze exercise started, within a certain range, the lower the exercise temperature, the stronger the frost resistance. Soluble sugar, starch content and frost resistance have a certain relationship, but not all are directly related. Increased soluble protein during antifreeze exercise is associated with increased frost resistance. Frost damage may occur on sainfoin from winter to spring, but decay and death are mainly manifest in spring.