土壤条件与苎麻农艺性状形成关系的初步研究

土壤有机质、氮、磷及铁、硼含量与茎粗、皮厚和出麻率呈负相关，虽略利于优质却降低产量；水解氮对优质高产均不利。钾、锰、锌与株高呈正相关、与有效株呈负相关，不利高产优质和原麻含胶率的降低。土壤容重和ｐ Ｈ 与株高之外其它经济性状呈正相关，有益高产优质，而总孔度的作用相反。土壤毛孔度和比重都有利优质，但前者与株高呈负相关、与有效株呈正相关，后者则反之。

Analysis on the relation of soil physical and nutritional properties to ramie agronomic characteristics

Contents of soil organic,nitrogen(N),phosphorous(P),effective Fe and B showed negative correlation with stem diameter,bast thickness,bast stripping percentage and the raw fiber yield(RFY),but slighly positive with the fiber fineness(FF);Soil hydrolyzable N content had negative correlation with both RFY and FF. Contents of soil potassium(K),effcetive Mn and Zn correlated positively to plant height,but negatively to effective stalks,RFY and FF, and made the gum content of raw fiber increase.Soil volume weight and pH value of soil solution correlated positively with stem diameter,bast thickness,effective stalks and bast stripping percentage rather than plant height,consequently positively correlated with RFY and FF,but the total soil porosity showed the opposite effect.Soil capillary porosity and specific gravity both positively correlated with FF,although the former correlated negatively to plant height but positively to effective stalks,and the latter was in the opposite status.