论文部分内容阅读
一、引言内蒙古土地总面积118万多平方公里,从东到西地跨亚洲大陆的温带湿润区、半湿润区、半干旱区、干旱区和极端干旱区,由于自然地理环境复杂多样,所以植物区系组成十分复杂,植物资源极为丰富。据统计,全区有种子植物2,290种,分属于116科,约占全国种子植物总科数的39.1%。其中饲用植物约536种,分属于43科,饲用植物中木本饲用植物有127种之多,分属于19科,在本区畜牧业生产中占有重要地位。尤其是在西部干旱和其它“白灾”、“黑灾”频繁的地区,木本饲用植物资源更具有举足轻重的作用。随着畜牧业生产的发展,人们正逐步开辟“空中草场”,发展木本饲料。例如额济纳旗70%的牲畜都靠梭梭、红柳和胡杨为生,该旗仅胡杨每年就可提供饲用叶子4,000万斤。同时木本饲用植物的粗蛋白质和氨基
I. INTRODUCTION Inner Mongolia has a total land area of more than 1.18 million square kilometers. From the east to the west, the temperate humid zone, semi-humid zone, semi-arid zone, arid zone and extreme arid zone across the continent of Asia have complicated and diverse natural and geographical environments. Therefore, The floristic composition is very complex and plant resources are extremely rich. According to statistics, there are 2,290 kinds of seed plants in the region, belonging to 116 families, accounting for 39.1% of the total number of seed plants in China. Among them, there are 536 kinds of forage plants belonging to 43 families, and there are 127 species of forages in foraging plants, belonging to 19 families, occupying an important position in the livestock production in this area. Especially in the western drought and other “white catastrophe” and “black catastrophe” frequent areas, woody forage plant resources more important role. With the development of livestock husbandry, people are gradually opening up “air grassland” and developing woody feed. For example, 70% of Ejina’s livestock live on Haloxylon, Tamarisk and Populus euphratica, and the Populus euphratica alone provides 40 million kg of feeding leaves per year. At the same time woody forage plant crude protein and amino