A research on the growth status of Trifolium repens and it's influences on soil nutrients was performed through measuring its biomass and growth factor,as well as soil organic matter,total N,total P,total K,hydrolytic N,available P,and available K.The land without fertilizer application and with successive cutting within two years was selected,and each time,all Trifolium repens above soil was harvested for the experiment.The research indicates that with the increasing harvesting time,the fresh and dry weight of Trifolium repens,its average length,and its stem diameter were decreased by 14.34%,13.12%,5.20%,and 3.38% per year,respectively.As for the upper layer soil,its organic matter varied from 24.37% to 8.75%.Its total N,total P,and total K were not apparently affected,but its available P,available K,and hydrolytic N were greatly affected,which were decreased by 46.56%,43.63%,and 16.69% in the two years,respectively.As for the bottom soil,changes in organic matter,total N,total P,and total K were like those in the upper layer soil,but its available P was greatly decreased compared with hydrolytic N and available K.Comprehensive analysis demonstrates that increasing harvesting time may lead to the decreases of soil fertility and productivity.Therefore,for a sustainable development,it is necessary to apply a certain amount of compound fertilizer,phosphorus fertilizer,and potassium fertilizer to the soil after successive cutting.