不同秋眠级紫花苜蓿品种的生产性能在郑州地区的表现

Productivity performance of alfalfa varieties with different fall dormancy classes in Zhengzhou area

试验研究了2,3,4,5,7,8共6个秋眠级18个紫花苜蓿Medicago stiva品种的重要农艺性状表现。结果表明,秋眠级对紫花苜蓿的年鲜草产量、株高等有较大影响,其中秋眠级别为4级的紫花苜蓿品种的年鲜草产量极显著高于5级(P<0.01),显著高于7级品种(P<0.05),但与2,3,8级品种产量差异不显著(P>0.05),综合考虑,秋眠级为2,3,4的紫花苜蓿品种较适合在郑州地区种植;不同茬次对其生长性能有更大的影响,其中第1茬的产量和株高最大,其次为第2,3茬,第4,5茬最低,前3茬占全年产量的80%左右,应加强对前3茬的管理。

The agronomic traits of 18 alfalfa varieties with different fall-dormancy classes ranging from 2 to 8（except 6） were studied in two growing years. The result showed that fall-dormancy classes had significant influence on annual fresh yield and plant height. Fresh yield of class 4 was significantly higher than class 5（P〈0.01）and class 7（P〈0.05）, but no significant difference was observed with classes 2, 3, and class8（P〉0. 05）. It was concluded that alfalfa with classes 2, 3, 4 fall dormancy were suitable for Zhengzhou. Different cuttings had important influence on growth performance. The first cutting gave the highest yield and plant height, followed by the second, third, forth, and fifth cutting accordingly; The first three cuttings made up 80% of the total yield, so management should be focused on them.