前言牧草的混播,不仅可以增加牧草产量、提高牧草品质,而且还能恢复土壤结构,提高土壤肥力。据国外报导,混播牧草的干草产量较单播提高14～25％。国内许多研究也证明,混播牧草的产草量比单播高。如据西北农科所试验,苜蓿与鸡脚草混播较单播增产12.4％,苜蓿与无芒雀麦混播较单播增产16.1％。 Pre-mixed grass pasture, not only can increase pasture production, improve pasture quality, but also restore soil structure and improve soil fertility. According to foreign reports, mixed hay yield more hay than unicast 14 ~ 25%. Many domestic studies have also proved that mixed grass forage grass yield higher than unicast. According to experiments by the Northwest Agricultural Research Institute, alfalfa and hemp grass mixed crop increased 12.4% compared with the unicast, alfalfa and Bromus sp. Mixed sowing more than unicast 16.1%.