论文部分内容阅读
陵川种羊场位于太行山南端的黄沙山上。海拔1,330—1,487米,无霜期140天,干旱缺水。年平均降水602.7毫米,多集中在7、8月份;年蒸发量1,614.8毫米;年平均气温7.9℃。石厚土薄,多为黄沙土壤。坡度为20—45°。天然草山草坡植被稀疏,覆盖率仅35—60%,以白羊草和铁秆蒿等为主,豆科牧草很少。为了发展羊群,培育优良半细毛羊品种,该场从1969年开始在原有植被上补播苜
Lingchuan species of sheep farm is located in the southern end of Mount Tai Huangshan. 1,330-1,487 meters above sea level, frost-free period of 140 days, drought and water shortage. The average annual rainfall of 602.7 mm, mostly concentrated in July and August; the annual evaporation of 1,614.8 mm; the annual average temperature of 7.9 ℃. Stone thick soil, mostly yellow sand soil. The slope is 20-45 °. Natural grass hill slopes vegetation sparse, covering only 35-60%, with Aristolochia and iron straw mainly legume little grass. In order to develop flocks, cultivate fine semi-fine sheep breeds, the field began in 1969 planted on the original planting of alfalfa