张家口坝上地区豆-禾牧草混播效果研究

Study on the Leguminous-Gramineous Grass Mixed Sowing in Bashang Area of Zhangjiakou

为研究张家口坝上地区豆禾牧草混播草地的建植效果,本试验以紫花苜蓿(Medicago sativa)与无芒雀麦(Bromus inermis)、垂穗披碱草(Elymus nutans)为研究对象,于2019年5月25日在国家牧草体系张家口综合试验站开展同行混播试验。试验设紫花苜蓿+无芒雀麦(MW)、紫花苜蓿+垂穗披碱草(MP)、紫花苜蓿+无芒雀麦+垂穗披碱草(MWP)3种混播组合,豆禾比为3∶7,4∶6,5∶5,6∶4,7∶3共5个混播比例,在紫花苜蓿初花期对建植当年人工草地生物量、牧草品质进行研究。结果表明:MWP组合在豆禾比4∶6处理下产量较高,在豆禾比7∶3处理下品质较好;MP组合在豆禾比3∶7,5∶5处理下能提高牧草的产量及品质;综合混播牧草品质与产量分析,MW为较理想的混播组合,以豆禾比为3∶7处理表现最佳。综上所述,在张家口坝上地区建立人工草地时,建议采用紫花苜蓿与无芒雀麦3∶7的混播处理。

In order to explore the planting effect of gramineous and leguminous mixed sowing grassland in Bashang area of Zhangjiakou,a same-line mixed sowing experiment using Medicago sativa、Bromus inermis and Elymus nutans were carried out on May 25,2019 at China forage and grass research system of Zhangjiakou Comprehensive Test Station.In the experiment,there were three mixture combinations of Medicago sativa+Bromus inermis(MW)、Medicago sativa+Elymus(MP)、Medicago sativa+Bromus inermis+Elymus(MWP),and 5 mixture proportions of leguminous-gramineous grass which were 3∶7,4∶6,5∶5,6∶4 and 7∶3 respectively.The biomass and forage quality of the artificial grassland in the first flowering stage of alfalfa were studied.The results showed that,MWP combination had higher yield under 4∶6 treatment and better quality under 7∶3 treatment;MP combination could improve the yield and quality of forage under 3∶7 and 5∶5 treatment;According to the comprehensive analysis of quality and yield of mixed forage,MW was an ideal combination,and the treatment of 3∶7 had the best performance.When establishing artificial grassland in Bashang area of Zhangjiakou,it is suggested to use the mixed proportion of Medicago sativa and Bromus inermis in 3∶7.