Studies on Nodulating Capacity of Some Forage Legumes Grown Alone or in Mixtures

ABSTRACT: A pot experiment was conducted to study the nodulating capacity of some forage legumes. Birdsfoot trefoil (Lotus corniculatus L), sainfoin (Onobrychis viciifolia Scop.) and subterranean clover (Trifolium subterraneum L.) were grown in pure culture (100%) and in mixtures with tall fescue (Festuca arundinacea Schreb.) in the ratios: birdsfoot trefoil + tall fescue (50:50%); sainfoin + tall fescue (50:50%); subterranean clover + tall fescue (50:50%); birdsfoot trefoil + subterranean clover + tall fescue (33:33:33%); sainfoin + subterranean clover + tall fescue (33:33:33%). Birdsfoot trefoil from the crops cultivated in pure stands showed the highest nodulation rating (31), followed by sainfoin (26) and subterranean clover (26). Nodulation rating in binary mixtures with grass component increased to 16.1% for birdsfoot trefoil and to 23.1% for subclover. Birdsfoot trefoil, both in pure stands and in mixtures, showed the highest phosphorus use efficiency for nodule formation.摘要：本研究通过盆栽试验，探究了多种饲用豆科植物的结瘤能力。供试材料包括百脉根（Lotus corniculatus L.）、红豆草（Onobrychis viciifolia Scop.）及地下三叶草（Trifolium subterraneum L.），试验设置两类种植模式：单作栽培（占比100%），以及与高羊茅（Festuca arundinacea Schreb.）的混播栽培。混播组合及比例具体为：百脉根+高羊茅（50:50）、红豆草+高羊茅（50:50）、地下三叶草+高羊茅（50:50）、百脉根+地下三叶草+高羊茅（33:33:33）、红豆草+地下三叶草+高羊茅（33:33:33）。结果显示，单作群体的百脉根结瘤评级最高（31），其次为红豆草（26）与地下三叶草（26）。在与禾本科组分构建的二元混播体系中，百脉根的结瘤评级提升16.1%，地下三叶草的结瘤评级提升23.1%。无论单作还是混播处理，百脉根用于结瘤形成的磷利用效率均为最高。