用深层发酵法生产Ａｐ—２号磷菌肥，于１９９０年至１９９２年在黑龙江省进行了田间试验。结果表明，与单施化学磷肥相比使小麦增产１８．１％；当代替５０—７０％化学磷肥时，与对照相比，使玉米分别增产１４．２７％和１２．１４％；用于大豆，其增产幅度与施磷菌肥的数量成正相关。当代替５０％、７０％和１００％化学磷肥时，分别比单施化学磷肥增产１２．８６％、１３．３２％和１４．１３％。 Ap-2 phosphate fertilizer was produced by deep fermentation, and a field experiment was carried out in Heilongjiang Province from 1990 to 1992. The results showed that the yield of wheat increased by 18.1% compared with that of chemical fertilizer alone, and that of corn increased by 14.27% and 12.14% respectively compared with the control when 50-70% chemical phosphate fertilizer was replaced. , The yield increase is positively correlated with the amount of phosphate fertilizer. When replacing 50%, 70% and 100% chemical phosphate fertilizer, 12.86%, 13.32% and 14.13% higher than chemical fertilizer alone.