天然针茅草地的生物产量和营养动态研究（II）

Research on the Biomass and Dynamic Nutrition of the Natural Stipa Grassland（ II ）

天然针茅草地主要有3种类型：（1）贝加尔针茅草地主要分布于吉林省西部平原草甸草原和内蒙古呼伦贝尔及科尔沁草原；（2）石生针茅草地主要分布在内蒙古锡盟的丘陵干草原；（3）大针茅草地主要分布锡盟典型栗钙土草地，片段向北延伸至蒙古国和俄罗斯东西伯利亚的南部。天然针茅草地生物产量与当地降水量有密切关系，贝加尔针茅草地产量较高，其次是大针茅草地和石生针茅草地。其营养型属NC—A型，适宜牛、羊、骆驼等家畜。

The natural Stipa grassland, including Stipa baicalensis, Stipa grandis and Stipa klemenzii grassland, was important community to form the mid-wet grassland sub-zone. There was closely relationship between the biomass of natural Stipa grassland and local rainfall. The higher forage yield was observed in the Stipa baicalensis grassland, in turn, that in the Stipa grandis and the Stipa klemenzii grassland. The type of nutrition was NC-A, which was beneficial to feeding cattle, sheep, camel and so on.