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研究了不同刈割间隔时间对苜蓿产草量、品质及越冬率的影响。结果表明:刈割间隔时间对苜蓿产草量、品质及越冬率有极显著影响(P<0.01)。随刈割间隔时间增大,苜蓿产草量增加;粗蛋白含量显著下降(P<0.05),粗纤维、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)含量显著(P<0.05)上升,导致干草品质下降;其中以间隔25 d越冬率最低,仅为83.33%,极显著(P<0.01)低于其它处理。综合考虑,试验地区及同类生态地区间隔35 d刈割可获得高产草量、高品质的苜蓿干草,而且越冬率高。
The effects of different cutting interval on the yield, quality and overwintering rate of alfalfa were studied. The results showed that cutting interval had a significant effect on the yield, quality and overwintering rate of alfalfa (P <0.01). With the increase of mowing interval time, the yield of alfalfa increased; the content of crude protein decreased significantly (P <0.05); the content of crude fiber, neutral detergent fiber (NDF) and acid detergent fiber , Which led to the decrease of hay quality. The minimum overwintering rate at 25 days was only 83.33%, which was significantly lower (P <0.01) than other treatments. Taken together, the experimental areas and similar ecological areas 35d mowing can obtain high-yielding grass, high-quality alfalfa hay, and the overwintering rate.