紫花苜蓿和无芒雀麦混播草地适宜刈割高度研究

Study on Cutting Height of Mixed Sowing of Alfalfa with Smooth Brome

混播方式和刈割高度直接影响混播草地的产量和草产品质量,为了确定适宜的混播方式和刈割高度,在内蒙古农牧业科技园区采用紫花苜蓿单播、无芒雀麦单播、紫花苜蓿与无芒雀麦1∶1混播、紫花苜蓿与无芒雀麦1∶2混播、紫花苜蓿与无芒雀麦2∶1混播五种播种方式建植草地,以2cm、5cm、8cm、11cm四种刈割高度进行采收。经过4年的研究表明,在五种播种方式中,紫花苜蓿与无芒雀麦2∶1混播产量最高;在四种刈割高度处理中,以8cm高度刈割为宜,除播种当年以外,产量最高而且能够保证混播草地可持续利用;紫花苜蓿与无芒雀麦2∶1混播并以8cm的高度刈割是紫花苜蓿和无芒雀麦混播草地最佳利用模式。

Mixture mode and cutting height affected the productivity and pasture quality. An experi- ments with mixed sowing of alfalfa with smooth brome in 1 ： 1 , 1 ： 2 and 2 ： 1, and mowing height were 2cm, 5cm, 8cm and 11cm were conducted in Inner Mongolia Agriculture Science and Technology Park to determine the proper mixture mode and cutting height. Through four years consecutive observation the re- sults showed that the productivity were the highest with the mixed sowing on alfalfa with smooth brome in 2 ： 1 and 8cm cutting height in all treatments, and it could ensure the grassland sustainable utilization, so the mixture mode of alfalfa with smooth brome in 2 ： 1 scale and 8cm cutting height were the west mode.