盐碱地紫花苜蓿品种筛选及耐盐性比较

为筛选适宜嘉峪关市盐碱地种植的紫花苜蓿优良品种，引进国内外10个紫花苜蓿品种，采用随机区组试验法进行了生产性能和耐盐性比较。结果表明，两茬鲜草和干草总产量位居前3位的品种是中兰2号、龙威和公农1号，鲜草产量分别为54 897.44、48 054.02、45 662.82 kg/hm2；干草产量分别为13 056.53、11 115.56、11 095.5 kg/hm2， 均与其他品种差异极显著。10个紫花苜蓿品种在耕层含盐量3.6 g/kg以下均能正常出苗，均具有一定耐盐性，中苜3号、中苜1号和中兰2号、龙威耐盐性较好。综合分析可得，中兰2号、龙威和公农1号这3个品种的丰产性、适应性、耐盐性等综合性状优良，适宜在嘉峪关市中轻度盐碱地种植。

Screening and Comparison of Alfalfa Varieties for Salt Tolerance in Saline-alkali Land

In order to screen the fine alfalfa varieties suitable for cultivation in the saline-alkali land of Jiayuguan, 10 alfalfa varieties, domestic or international, were introduced, and the production performance and salt tolerance were compared by random block test method. The results showed that the top three varieties in terms of total fresh grass and hay yield in two cuts were Zhonglan 2, Longwei and Gongnong 1, with fresh grass yields of 54 897.44 kg/ha, 48 054.02 kg/ha and 45 662.82 kg/ha, respectively. The hay yields were 13 056.53 kg/ha, 11 115.56 kg/ha and 11 095.5 kg/ha, respectively, which were significantly different from other varieties(P < 0.01). All 10 varieties could emerge under the salt content of 3.6 g/kg in top soil which all showed certain salt tolerance, among which Zhangmu 3, Zhongmu 1 and Zhonglan 2 showed ideal salt tolerance. The comprehensive analysis showed that Zhonglan 2, Longwei and Gongnong 1 had excellent comprehensive traits such as high yield, adaptability and salt tolerance, and were suitable for popularizing and planting in mildly saline-alkali land in Jiayuguan.