位于甘肃省东部的庆阳地区,属陇东黄土高原沟壑区,海拔一般为1,200～1,400米,年均降雨量350～660毫米,年均气温7～10℃,无霜期114～180天。本区拥有天然草场1,909.23万亩,植被主要以蒿属等杂类草为主,优良牧草仅占35～55％,生产能力低下。为对天然草场进行改良,我区牧草工作者于80年代初就进行了草场改良的试验研 Located in the Qingyang area in the east of Gansu Province, it belongs to the gully area of ​​Longdong Loess Plateau with an elevation of 1,200-1,400 meters and an average annual rainfall of 350-660 mm. The annual average temperature is 7-10 ℃ and the frost-free period is 114-180 days. The area has 19,992,300 mu of natural grassland, the main vegetation is Artemisia and other miscellaneous grass-based, fine forage only 35 to 55%, low production capacity. In order to improve the natural grassland, pasture workers in our district conducted experiments on grassland improvement in the early 1980s