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.