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本文利用国内外5个不同苜蓿品种为试验材料,以秋季刈割1次为对照组,刈割两次为试验组。通过人工控温试验和大田试验以人工冷冻胁迫后各再生长指标为衡量指标,比较两组抗寒性能的差异。结果表明,晚秋刈割明显削弱了各品种的抗寒性能。
In this paper, five different varieties of alfalfa at home and abroad were used as experimental materials, mowing in autumn once as control group and mowing twice as experimental group. Through artificial temperature control test and field experiment, the indexes of re-growth after artificial freezing stress were taken as indexes to compare the difference of cold-resistance of the two groups. The results showed that cutting in late autumn significantly weakened the cold resistance of all varieties.