海藻肥与无机水溶肥配施对橡胶树小筒苗生长及叶片养分的影响

采用海藻肥与无机水溶肥不同配比混合液对橡胶树小筒苗灌根施肥,统计对比不同肥料配比下橡胶树小筒苗的生长情况及叶片养分元素含量,以筛选出适宜橡胶树小筒苗生长的肥料配比浓度。结果表明,采用优马盖世200倍液与海芝翠650倍液配施灌根处理对小筒苗生长更为有利,但各处理均存在养分不平衡问题。要获得更为健壮的小筒苗还需适当添加含Mg、Cu和Mn等元素的肥料作为补充,同时根据橡胶苗需肥规律增加施肥频次,以保证橡胶苗的正常生长及养分间的平衡。

Species of Inorganic Phosphate Solubilizing Bacteria in Red Soil and the Mechanism of Solubilization

INTRODUCTION The insoluble phosphates which can not be directly absorbed by plants are the mai forms of inorganic phosphate in soil. These kinds of phosphates can be solubilized by several species of bacteria which are widely spread in soil especially in rhizosphere where70% of the bacteria are capable of solubilizing inorganic phosphate. Many researchers re-