两种滴灌方式下紫花苜蓿与无芒雀麦单播与混播草地第一茬牧草生产力研究

Study on the Productivity of Alfalfa and Smooth Bromegrass in Mono-culture and Mixed-culture under Two Drip Irrigation Methods

为探讨不同灌溉方式对紫花苜蓿和无芒雀麦在单播和混播下株高、生长速率和产量等影响,设置地表滴灌和地下滴灌2种滴灌方式和紫花苜蓿单播、无芒雀麦单播以及紫花苜蓿和无芒雀麦混播3种种植方式处理。研究结果表明:紫花苜蓿单播,无芒雀麦单播以及紫花苜蓿和无芒雀麦混播的牧草株高、生长速率,牧草产量在地下滴灌处理下显著高于地面滴灌。混播的牧草生物量介于紫花苜蓿单播和无芒雀麦单播牧草生物量之间。因此,滴灌带埋深20cm以下的地下滴灌更有利于苜蓿生长,提高苜蓿干草产量,更适于在我国西北干旱地区进行推广和应用。

This study was to investigate the effects of different irrigation methods on plant height,growth rate and yield of alfalfa(Medicago sativa L.)and bromegrass under mono-culture and mixed-culture grassland,and set up two drip irrigation methods and two way of surface drip irrigation and subsurface drip irrigation.The results showed that the height and growth rate of the forage in mono-culture and mixed-culture grassland of alfalfa and smooth bromegrass under subsurface drip irrigation were significantly higher than that of surface drip irrigation.In addition,the biomass of the forage in mixed-culture is between the biomass of alfalfa and bromegrass in mono-culture.Therefore,subsurface drip irrigation with a depth of 20 cm or more is more conducive to the growth of alfalfa and increase the yield of alfalfa hay,which is more suitable for promotion and application in the arid regions of northwest China.