广西赤红土速效磷测定方法的比较研究

A COMPARATIVE RESEARCH OF THE DETERMINATION METHODS OF ACTIVE PHOSPHORUS IN LATERITIC LOAM

试验表明:Brayl、Al-Abbas、Olsen 和 Mehlich Ⅲ法均能用于广西赤红土速效磷的测定。如只测定土壤速效磷含量,以选用 Al-Abbas 或 Bray Ⅰ为好。如需要同时测定 P,K,Ca,Mg,N8,Mn,Cu,Fe 和 Zn 的速效含量,选用大规模联合提取剂 Mehlich Ⅲ法测定土壤速效磷含量也较为满意。

The results indicated that Bray Ⅰ,Al-Abbas,Olsen and Mehlich Ⅲ methods can all be used in the determination of the active phosphorus in lateritic loam in Guangxi.It is suggested that Al-Abbas or Bray Ⅰ method should be the best,if determine the active phosphorus in soil only. But,if it is required to determine contents of active P,K,Ca,Mg,Na, Mn,Cu,Fe and Zn at the same time,on a large scale selected the combined extractant,Mehlich Ⅲ method in determining content of active phosphorus in soil is satisfactory.