苜蓿生长的各年度,尤其播种第一年,过好越冬关(特别是在寒冷地区),是提高苜蓿产草量和产种量的关键问题之一。河北各地都有提高苜蓿越冬的经验,尤以寒冷地区的经验更多。种植抗寒品种不同品种苜蓿,越冬抗寒力也不一样。据阳原、蔚县、沽源、围场等县试验,澳大利亚猎人河苜蓿,在长城以北,播种第一年,越冬率仅0.01—2.17%;察北牧场试验,在坝上高寒地区晋南苜蓿及秘鲁苜蓿,播种第一年越冬率为78.4%和87.5%,而公农一号、萨尔图、蔚县、察北等品种苜蓿均 Alfalfa growth in each year, especially in the first year of sowing, over-wintering, especially in cold areas, is to improve alfalfa grass production and yield one of the key issues. All over Hebei have the experience of improving alfalfa winter, especially in cold areas more experience. Planting different varieties of cold-resistant alfalfa, winter cold resistance is not the same. According to Yangyuan, Yuxian County, Guyuan, paddock and other county trials, the Australian hunter alfalfa, north of the Great Wall, the first year of sowing, overwintering rate of only 0.01-2.17%; Chabei ranch experiment in the alpine region dam Jinnan Alfalfa and Peruvian alfalfa, the overwintering rates in the first year of sowing were 78.4% and 87.5%, respectively, whereas the alfalfa varieties including Gongnong No.1, Salto, Yuxian and Chabei were