Incubation study on nitrogen mineralization dynamics of forest soil amended with sewage sludge

WANG Genmei, LIU Shuxin, YANG Li

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2012, Vol. 36 ›› Issue (05) : 87-91.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2012, Vol. 36 ›› Issue (05) : 87-91. DOI: 10.3969/j.jssn.1000-2006.2012.05.016

Incubation study on nitrogen mineralization dynamics of forest soil amended with sewage sludge

  • WANG Genmei1, LIU Shuxin1, YANG Li1,2
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Abstract

Laboratory incubation experiment was conducted to study the kinetics of N mineralization and to investigate the effect of two factors (sludge rate and incubation temperature) on N mineralization during a 16week incubation period. The results showed that N mineralization followed a one pool kinetic model (Nm=N0[1-exp(1-k×t)]). The value of N0 increased with temperature and sludge amount while value of k increased with temperature and decreased with sludge amount. The results also indicated that the effect of sludge amount on N mineralization could be separated into two ranges: when sludge was amended at the rate between 3 % to 6 %, the rate of N mineralization decreased obviously with sludge amount; when sludge was amended at the rate of ≥6 %, N mineralization changed little among treatments. It was also found that the rate of N mineralization increased with temperature.

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WANG Genmei, LIU Shuxin, YANG Li. Incubation study on nitrogen mineralization dynamics of forest soil amended with sewage sludge[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2012, 36(05): 87-91 https://doi.org/10.3969/j.jssn.1000-2006.2012.05.016

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