木质素对土壤磷素形态转化及对磷有效性的影响

Influence of Lignin on Transformation of Phosphorus Fractions and Its Validity

利用木质素改性磷肥对石灰性土壤和红壤进行培养实验,通过有效磷及无机磷分级测定,研究了木质素对土壤有效磷及磷素形态转化的影响。结果表明,木质素能提高土壤有效磷的含量,并能促进无机磷向有效磷源形态转化,对提高磷肥的利用率有重要意义。

The present study is carried in a laboratory on calcareous soils and red soils receiving phosphoric fertilizers modified by lignin. By testing the content of available phosphorus and fractionation of inorganic phosphorus, the result showed that the content of available phosphorus was enhanced and the transformations of available fraction from inorganic phosphorus was advanced in the presence of lignin. This result may be suggested that lignin be regarded as an effective modifier to improve the availability of phosphate fertilizer.