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In order to select a best mowing regime for natural grassland in Hulun Buir with highly efficient hay-making and sustainable utilization, we conducted an experiment to examine the effects of mowing time (July 31, August 10, August 20, August 30, and September 9), stubble height (3, 9, and 15 cm), and their interaction on grassland community characteristics and forage yield and quality in a grassland of Hulun Buir from 2019 to 2021. The results showed that late mowing and low stubble-height mowing significantly reduced community-level height and coverage in the next year. Low stubble-height mowing reduced community aboveground biomass in the following year, but the effect of mowing time was not significant. The relative biomass of grasses and sedges first increased and then decreased with the delay of mowing time, forbs showed an opposite pattern, and legumes showed no signi-ficant change. Low stubble-height mowing could enable higher hay yield in the same year, but resulted in substantial reduction in the next year. When mowing on August 30 with 3 cm high stubble left, the hay yield reached maximum value of 469 g·m为确定呼伦贝尔草原高效生产和可持续利用的最佳刈割制度,于2019—2021年在呼伦贝尔草原开展刈割时间(7月31日、8月10日、8月20日、8月30日、9月9日)、留茬高度(3、9、15 cm)及两者交互作用对草原群落特征、牧草产量和品质影响的研究。结果表明: 较晚时间刈割和低留茬刈割会降低翌年群落高度和盖度;低留茬刈割降低翌年地上部分生物量,但刈割时间对其影响不显著。禾草、莎草相对生物量随刈割时间的延迟表现出先增加后减少的趋势,杂类草则与之相反,而豆科植物无明显变化。低留茬刈割在当年能够获得高的干草产量,但翌年的干草产量显著下降;8月30日,留茬3 cm刈割时干草产量达到最高值(469 g·m |
