我国很多牧区风多,干旱,气候不调,不少地牧草不旺,并且一到冬季,冰封千里,风霜为灾,牲畜常因冻饿大量死亡,严重影响着牧业的发展。内蒙牧区经验,森林在冬季可避风雪,可解决部份牲畜鉰料,每亩沙棗可养五只羊,比草地价值大几倍;森林在夏季可使牧草丰盛,气候凉爽,牲畜骠肥,因而,在牧区造防护林是完全必要的。这对改造牧区面貌,发展畜 Many pastoral areas in our country have many windy, arid and unregulated climates. Many of them have not been favorably grazed pasture. In the winter, when they freeze in climates and suffer from wind and frost, livestock often die in a large number due to freezing and starvation, which seriously affects the development of animal husbandry. Inner Mongolia pastoral experience, the forest in winter can be sheltered from snow, can solve part of the livestock material, per acre jujube can raise five sheep, several times larger than the value of grassland; forest in the summer can make forage rich, cool climate, Therefore, it is absolutely necessary to build shelter forests in pastoral areas. This is the transformation of pastoral areas, the development of livestock