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Ma H.-L.,Province Ministry Co Constuct Key Laboratory of Humid Subtropical Eco Geographical Process | Ma H.-L.,Fujian Normal University | Liu W.-L.,Province Ministry Co Constuct Key Laboratory of Humid Subtropical Eco Geographical Process | Liu W.-L.,Fujian Normal University | And 6 more authors.
Chinese Journal of Applied Ecology | Year: 2011

A laboratory incubation test was conducted to study the effects of litters and tannin on forest soil nitrate- and ammonium N. The addition of litters and tannic acid made the soil nitrateand ammonium N decreased. With the addition of fir litter, the nitrate- and ammonium N contents in red soil decreased by 6. 1%-25. 9% and 19. 7%-68. 6%, respectively, and the decrements in yellow-red soil were higher than those with the addition of bamboo litter, being significant for ammonium N. Compared with the control, the addition of tannin decreased the ammonium N content in yellow-red soil significantly, and there was a positive correlation between the concentration of added tannin and the decrement of soil ammonium N content. When the concentration of added tannin was high, the decrement of the ammonium N reached 31.9%-57.8%. With the addition of low concentration tannin, the soil nitrate N content decreased with time, and the decrement on the 84 th day reached 4. 5%. However, the addition of high concentration tannin increased the soil nitrate N content by 10. 3%-18. 5% in the first 7-28 days, but decreased it by 23. 9% and 42. 3% on the 56th and 85th day, respectively.

Loading Province Ministry Co Constuct Key Laboratory of Humid Subtropical Eco Geographical Process collaborators
Loading Province Ministry Co Constuct Key Laboratory of Humid Subtropical Eco Geographical Process collaborators