主要环境因子与苎麻产量品质关系研究

高温、强光和高蒸发量增加株高却减少有效株数，不利高产优质；生长中后期总日照时数较多则利于茎粗、皮厚、鲜皮出麻率和产量提高并降低原麻含胶率；雨日和雨量较多能增加有效株，提高支数；较高相对湿度使茎粗、皮厚、有效株、鲜皮出麻率及产量和支数提高、原麻含胶率下降。总辐射量大抑制除株高之外其它经济性状发育，造成低产劣质；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PH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。

Ramie Influences of weather parameters and soil properties to the fiber yield and quality

The result from multiple-sites experiment showed:During the whole growth period, high temperature and evaporation,strong sun light decreased effective stalks(ES), raw fiber yield (RFY)and fiber fineness(FF) despite of some stimulation to plant height (PHt) of ramie; More precipitation amount and rain days helped to increase ES and FF;More total sunshine hours in the mid-late growth sstage was helpful to enhance sstem diameter (SD),bast thickness (BT), bast stripping percentage(BSP) and RFY,and to lessen the gum content of raw fiber.Higher relative humidity of air was propitious to aggrandize SD, BT, ES, BSP and RFY,to meliorate FF and to reduce gum content in raw fiber;High total solar radiation was only good to PHt but disbennifit to other economic characters,sesulting in low RFY and FF.Contents of soil organic, nitrogen(N), phosphorous(P),effective Fe and B showed negative correlation with SD, BT, BSP and RFY, but slighthy positive with FF;Soil hydrolyzable N content had negative correlation with both RFY and FF.Contents of soil potassium(K),effective Mn and Zn correlated positively to PHt, but negatively to ES,RFY and FF,and made the gum content of raw fiber increase.Soil volume weight and pH value of soil solution correlated positively with SD, BT, ES and BSP rather than PHt, consequently positively correlated wiht 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 PHt but positively to ES, and the latter stood in the opposite status.