旱地豆科绿肥作物科杂1号的选育及应用研究初报

Breeding and Utilization of Upland Leguminous Green Manure Crop Keza 1

利用栽培大豆（Ｇ．ｍａｘ）与半野生大豆（Ｇ．ｇｒａｃｉｌｉｓ）诱变的中间材料进行种间杂交，经过Ｆ４代系谱选择，育成了主茎粗、分枝数和生物量等性状具有明显优势，根系发达，根瘤固氮力强的新型旱地豆科绿肥作物新品种——科杂１号。该品种覆盖期长（２００ｄ左右），覆盖厚度３５ｃｍ以上，半蔓化匍伏生长，不缠绕树体。盛花至结荚期每公顷鲜草量３７５０１～５２５８０ｋｇ，是目前幼龄果园覆盖、培肥、抑制杂草、保持水土、改善果园生态环境。

Keza 1, a new variety of leguminous green manure crop,bred from interspecific cross of the cultivated soybean and an intermediate material of semi wild soybean after radiation.For generations of linear selection,it had a developed root system, high nitrogen fixing capacity and evident superiority in main stem, branch and biomass The variety had long covering term (about 200 days) and cover thickness was over 35 cm per plant It semi trailed, crept but not twined,and biomass yield of up ground part was 37501～52580 kg per hectare from full bloom to fruiting period.It was a good leguminous green manure in young orchard area.