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Published online 2 February 2006
Published in Soil Sci Soc Am J 70:359-366 (2006)
DOI: 10.2136/sssaj2005.0061
© 2006 Soil Science Society of America
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Soil Nitrogen Cycling following Montane Forest Conversion in Central Sulawesi, Indonesia

Marife D. Corre*, Georg Dechert and Edzo Veldkamp

Institute of Soil Science and Forest Nutrition, Univ. of Goettingen, Buesgenweg 2, Goettingen 37077, Germany


Figure 1
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  		Fig. 1. (A) Initial NH4+ and NO3– pools, and (B) percentage of 15N recovery in the labeled pools 15 min (T0) after 15N injection in the intact cores. Means (bars for standard errors; n = 4) of either NH4+ or NO3– pools without letter or with the same letter indicate no significant difference among land use types at each location (One-way ANOVA, Least Significant Difference test at P ≤ 0.05). (n.d. = not detectable). * indicates significant difference between NH4+ and NO3– pools and between 15NH4+ and 15NO3– recoveries at each land use type and location (Independent t test at P ≤ 0.05).

 

Figure 2
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  		Fig. 2. (A) Gross N mineralization rates and gross NH4+ consumption rates, and (B) mean residence time of NH4+ pool. Means (bars for standard errors; n = 4) with the same letters (lowercase for gross N mineralization rates and uppercase for gross NH4+ consumption rates) indicate no significant differences across all land use types and locations (One-way ANOVA, Least Significant Difference test at P ≤ 0.05).

 




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