有机肥对土壤有机磷组分及其有效性的影响

本文采用Bowman-Cole法,对1984和1986年吉林省农科院黑土定位试验各小区土样,进行了有机磷分组分析,并测定了土壤全磷和有效磷含量。分析结果表明:施用有机肥,首先使土壤相对活性有机磷和高稳态有机磷增加。然后再转化为其它形态的有机磷或无机磷。土壤有效磷和活性有机磷、相对活性有机磷及中稳态有机磷均呈显著相关。有机肥使石灰性土壤pH下降,磷的有效性提高。

THE EFFECT OF ORGANIC FERTILIZER ON THE FORMS AND AVAILABILITY OF ORGANIC PHOSPHORUS IN SOILS

The effect of organic fertilizer on the forms and availability of organic phosphorus was evaluated by fractionation of organic soil phosphorus in 1984 and 1986 at the long-term fixed experiment plots on black soil in Jilin, China.Total P and available P were determined. The result showed that the moderately labile organic P and highly resis- tant organic P were increased first with organic fertilizer applied in the soil.Then both were transformed gradually into other forms of P.Correla- tion between available P and labile organic P and moderately labile organic P and moderately resistant or ganic P was significant.Increase of P availability and decrease of pH in the soil resulted from organic fertilizer applied.Organic P was one of the main P resourses available in the soil.