红壤微生物量磷与土壤磷之间的相关性研究

Study on relationship between microbial biomass phosphorus and soil phosphorus in red soils

对８ 种肥力水平差异较大的红壤进行了微生物量磷与土壤磷之间的相关性研究⒚结果表明，红壤微生物量磷与土壤全磷、土壤有机磷以及土壤速效磷之间存在明显正相关⒚红壤微生物量磷尤以与土壤速效磷关系最为密切，提示两者之间存在某种动态平衡；同时，要提高红壤固定磷的利用率，可通过刺激土壤微生物的生长。

Eight red soils differing in fertility levels were tested to study the relationship between soil microbial biomass phosphorus and soil phosphorus.The results showed that the red soil microbial biomass phosphorus was closely related with soil total phosphorus, soil organic phosphorus and soil quick available phosphorus. The relative coefficients were 0.840,0.897 and 0.944,respectively. The especially significant relation of red soil microbial biomass phosphorus to soil quick available phosphorus suggests that there exists a certain dynamic balance between these two types of phosphorus; meanwhile, the ultilization rate of fixed phosphorus in red soils could be improved by promoting the growth of soil microorganisms and ,furthermore,turnover and cycling of phosphorus by soil microorganisms.