苕子系豆科绿肥作物。我地区引种过程中,虽适于酸性、瘠薄的低丘红壤栽培,但由于苕子茎叶生长旺盛,且有蔓生习性,分枝能开花的不多,其开花结荚期又正值高温多雨的初夏季节,在自然栽种情况下,繁茂茎叶匍匐地面相互覆盖,阴蔽潮湿而导致落花不实,茎叶霉烂,给苕子留种带来了很大的困难。 Department of beans legume green manure crops. My area during the introduction process, although suitable for acid, infertile hilly red soil cultivation, but the prickly heat of the stems and leaves grow, and there are trailing habits, not many branches to flowering, flowering and podding period is at a time when hot and rainy In the early summer season, in the case of natural planting, lush stems and leaves creeping on the ground covered each other, overcast moisture caused false flowers, mildew stems and leaves, leaving a great difficulty to the seeds leave.