骨粉是一种难溶性磷肥,其主要成分为磷酸三钙,含量占50—70%。骨粉还含有机质25—30%,氮素物质约5%。直接施用骨粉于土壤中,其肥效甚缓慢;特别是在红壤中,骨粉磷肥很难扩散,且被固定成铁、铝磷酸盐,使磷肥的利用率减低。我国许多柑桔产区有施用骨粉的习惯。为了提高骨粉的肥效,有的先将骨粉在嫌气条件下沤泡一段时期。这种方法对骨粉中磷酸三钙的分解转化作用不大。土壤中接种内生菌根真菌能使许多农作物形成菌根而增强根系对养分的吸收能力,特别有利于提高磷肥的肥效。Daft和Nicolson(1966)证明 Bone meal is a kind of insoluble phosphate fertilizer, its main component is tricalcium phosphate, its content accounts for 50-70%. Bone meal also contains 25-30% organic matter, nitrogenous substances about 5%. Direct application of bone meal in the soil, its fertilizer effect is very slow; especially in red soil, it is difficult to spread bone meal phosphate, and was fixed into iron, aluminum phosphate, phosphate fertilizer utilization. Many citrus growing areas in China have the habit of using bone meal. In order to improve the efficiency of bone meal, some of the first bone in the anaerobic bubble conditions bubble period. This method of decomposition of tricalcium phosphate in the conversion of little effect. Inoculation of endophyte mycorrhizal fungi in soils can make many crops form mycorrhizae and enhance the ability of roots to absorb nutrients, which is especially beneficial to increase the fertilizer efficiency. Daft and Nicolson (1966)