Study on the Principles of the Roots Length Growth of Erect Peanut

By using the method of washing the roots from deep soil,all the lateral roots length of erect peanut was measured to study the principles of the roots length growth of erect peanut in deep soil.The results showed:In the seedling stage,the taproot was the longest root.From the late seedling stage to the late mature stage,the longest first order lateral root was the longest root;1st to 3rd order lateral roots were the main part of roots of erect peanut.In the mature stage,the growth trend of the taproot and the longest first order lateral root reduced obviously,neither the taproot nor the longest first order lateral root were certain to be the deepest root.