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2003~2004年在内蒙古西辽河平原进行了刈割次数对紫花苜蓿翌年生长及草产量影响的研究,结果表明:随着刈割次数的增加翌年返青率的下降幅度逐渐增大;刈割次数对翌年各茬草株高、分枝数、干草产量的影响随着刈割茬次的增加而逐渐减小。同时,年内各茬次之间的株高、分枝数、干草产量均存在一定的互补性。综合2年试验结果认为,研究地区灌溉条件下种植紫花苜蓿年内刈割3~4次较为适宜。
The results showed that the decreasing rate of greening rate of the following year increased with the increase of the number of mowing; the number of mowing times In the following year, the effects of plant height, branch number, and hay yield on each cropland gradually decreased with the increase of mowing times. At the same time, the plant height, branch number and hay yield all have certain complementarity during the year. According to the results of two years, it is appropriate to planted alfalfa for 3 to 4 times during the year under irrigation in the study area.