改性造纸黑液木质素氮素释放规律

利用Stanford的间歇淋洗法研究了AOL作为控释氮肥的氮素矿化释放特性。结果发现,通气状况对AOL的氮素矿化与释放有较大的影响。在相同的时间里加砂处理比未加砂的氮素矿化量大,并且加砂处理可以显著提高施入AOL后的土壤矿化势,表明改善通气状况可以提高土壤有机质的矿化强度和供氮潜力。通过回归分析,建立了AOL所含的有机键合态氮在土壤中矿化释放的动力学预报模型。

Nitrogen Release of Modified Lignin in Wastewater from Paper - Making Mill

The mineralizing and nitrogen releasing characteristic of modified lignin in wastewater from paper-making-Ammoxidized Lignin(AOL)was studied through intermittent leaching method. The result indicated that aeration status had a great effect on the mineralization and release of nitrogen in AOL. AOL in treatment with sand showed a higher percentage of nitrogen was mineralized than that of without sand, and so was the mineralisable nitrogen potential in the soil. That means the degree of mineralization of AOL is strengthened in the treatment with sand. First order kinetic equations of two treatments (with or withoutsand) have been established through regression analysis indicating that the mineralization or release of nitrogen in AOL when being fertilized to the soil.