在黑龙江大庆地区研究刈割时期(分枝期、孕蕾期)和刈割留茬高度(5cm、10cm)对紫花苜蓿种子田生育期的影响。结果表明,刈割显著地影响了苜蓿的生育进程,各处理各生育期均推后,种子无法成熟。同一时期刈割,刈割高度不同也对各生育期产生不同影响。刈割高度越低,生育期延后越多。 In Daqing area of ​​Heilongjiang province, the effects of cutting period (branching stage, pregnant bud stage) and cutting stubble height (5cm, 10cm) on the growth period of alfalfa seed field were studied. The results showed that mowing significantly affected the growth of alfalfa. After all the treatments were pushed back, the seeds could not mature. The same period of cutting, cutting height also has a different impact on each growth period. The lower the cutting height, the more delay the growth period.