在一般的土壤中含有大量的磷素成份。据分析,一亩农田土壤的耕作层中含磷量上百斤,相当于过磷酸钙一吨以上,但实际上只有1％左右是有效的,其余大部分磷素不能被植物吸收利用。磷细菌可以将土壤中难溶的磷素成分转化为作物可吸收利用的磷酸盐类。为了解磷细菌肥作水稻沾秧根的增产效果,我们于1974年在乐和三队水稻田上进 In general the soil contains a large amount of phosphorus. According to the analysis, the amount of phosphorus in the tillage layer of an acre farmland soil is about one hundred kilograms, equivalent to more than one tonne of superphosphate, but in fact, only about 1% is effective, and most of the remaining phosphorus can not be absorbed by the plants. Phosphobacteria convert insoluble phosphorus in soils into phosphates that the crop can absorb. In order to understand the effects of phosphorus-based bacterial fertilizer on the yield of rice-rooted shoots, we conducted the project in Leh and the three paddy fields in 1974