北方干旱区优良牧草抗旱性和抗寒性研究进展
Progress in drought resistance and cold tolerance of artificial pastures in northern arid areas

干旱和低温是制约北方干旱区栽培草地发展的限制因子。文章对北方干旱区常见的紫花苜蓿、羊草、老芒麦、垂穗披碱草、无芒雀麦和冰草6种牧草的抗寒性、抗旱性的研究进展进行了分析，并从外部形态、生产力、生理生化指标等方面，就不同牧草品种对低温和干旱的适应性以及反馈机制进行了综述，最后对牧草抗性未来的研究方向进行了展望。
Drought and low temperature are important factors that limit the growth and survival of artificial pastures in northern arid areas in China.This paper described cold and drought resistances of six pastures including Medicago sativa,Leymus chinensis,Elymus sibiricus,Elymus nutans,Bromus inermis and Agropyron cristatum and summarized their adaptive mechanisms to drought and low temperature stresses from the perspectives of morphological structure,production,physiological and biochemical characteristics,antioxidase system,and osmoregulation substrate.At last,the future research directions were prospected