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通过测定土壤对磷的等温吸收，研究了木质素对土壤吸磷特性的影响。结果表明：木质素能够使土壤对磷的吸收量减少；随着磷的初始浓度（C0）的增加，加木质素与不加木质素处理土壤对磷的吸收量差异增大，这种差异在不同土壤间明显不同；C0＝80mp／L（本试验设定的最大浓度）时，供试土壤对磷的吸收量减少率分别为：红壤10．04％，黄壤9．80％，紫色土31．30％。
The effect of lignin on phosphorus uptake by soil was studied by measuring the isothermal uptake of phosphorus by soils. The results showed that: lignin can reduce the phosphorus uptake by soil; with the increase of phosphorus initial concentration (C0), the difference of phosphorus uptake increased with the addition of lignin and no lignin The difference between different soils was obviously different. When C0 = 80mp / L (the maximum concentration set in this experiment), the reduction rates of phosphorus uptake by soil were 10.04% of red soil, 9.80% of yellow soil, .30%.