Production of six alfalfa cultivars in Northwest of Hebei Porvice

In order to select suitable aflalfa cultivars in Zhangjiakou dam areas, six aflalfa cultivars including Debao, Aohan, Zhongmu No.1, Suntory, Algonquin and gold queen were studied for their winter survial rate in the first two years and morphological indicators in the third year. The difference of winter survial rates between alfalfa cultivars in the first year was significant (P0.05), however, the difference of them was not significant although the winter survial rates of each cultivar increased in the second year. Different alfalfa cultivars had significant difference (P0.05) in height, branch number, inflorescence weight. The branch number and inflorescence weight decreased gradually with the mowing times increase. The height after second mowing was higher than that after first and third mowing. The dry weight/fresh weight (DW/FW) after second mowing was lower than that after first and third mowing. The main variations of alfalfa firstly come from inflorescence weight and branch number, and then come from DW/FW and stem weight/leaf weight ratio. Zhongmu No.1 were suitable cultivar in Zhangjiakou dam areas.