三江平原岗坡低产土壤建立人工草地综合效益初探

COMPREHENSIVE BENEFITS OF SOWN PASTURES ESTABLISHED ON THE HILLY LOW FERTILITY LAND IN SANJIANG PLAIN

三江平原自开发以来单一农业生产,土壤肥力衰退,单产下降,低产耕地的培肥成为三江平原开发的重要内容之一。“七五”期间建立人工草地示范区,利用牧草地上部养畜,粪肥回田,根系改良土壤培肥地力以促进农区牧业发展,实现农牧并举。“七五”期间建立的示范区初步得到了经济效益、社会效益和生态效益。

Grain production has been a solely practice since Sanjiang Plain was tapped. Hence soil fertility decrease and grain prodution is non sustainable. A demonstration area was set up, sown pasture was estab-lished, livestock preduction was developed, and so that soil fertility was improved during the past five years. These resulted in increases of both grain production and livestock production. Economical, social and ecological benefit have been obtained.