Abstract:Chamaecrista rotundifolia is a recently introduced and screened leguminous pasture. It possesses drought and high resistance biological characteristics. It is suited for planting in the southern red soil mountain area especially inter-planting in the orchard. Scientific research and its field application can improve yield and quality of the pasture. Pot experiment was conducted to study the effects of applying selenium (Se) fertilizer on plant growth, leaf nitrate reductase activity, root nodule nitrogen-fi...