Effects of irrigation and nitrogen fertilization on hay yield and water use efficiency of Medicago sativa.
WANG Tian-tao1, SHI Shang-li1, ZHANG En-he2, WANG Qi1,3, LIU Qing-lin2, LIU Chao-wei2,YIN Hui1
1College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;2Agronomy College, Gansu Agricultural University, Lanzhou 730070, China;3State Key Laboratory of Frozen Soils Engineering and Cryosphere Research Station of the Qinghai-Tibetan Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China