Soil Nitrogen Transformations and Availability in Upland Pine and Bottomland Alder Forests
AbstractSoil nitrogen (N) processes and inorganic N availability are closely coupled with ecosystem productivity and various ecological processes. Spatio-temporal variations and environmental effects on net N transformation rates and inorganic N concentrations in bulk soil and ion exchange resin were examined in an upland pine forest (UPF) and a bottomland alder forest (BAF), which were expected to have distinguishing N properties. The annual net N mineralization rate and nitrification rate (kg N·ha−1·year−1) were within the ranges of 66.05–84.01 and 56.26–77.61 in the UPF and −17.22–72.24 and 23.98–98.74 in the BAF, respectively. In the BAF, which were assumed as N-rich conditions, the net N mineralization rate was suppressed under NH4+ accumulated soils and was independent from soil temperature. On the other hand, in the UPF, which represent moderately fertile N conditions, net N transformation rates and N availability were dependent to the generally known regulation by soil temperature and soil water content. Stand density might indirectly affect the N transformations, N availability, and ecosystem productivity through different soil moisture conditions. The differing patterns of different inorganic N indices provide useful insight into the N availability in each forest and potential applicability of ion exchange resin assay. View Full-Text
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Yoon, T.K.; Noh, N.J.; Chung, H.; Yang, A.-R.; Son, Y. Soil Nitrogen Transformations and Availability in Upland Pine and Bottomland Alder Forests. Forests 2015, 6, 2941-2958.
Yoon TK, Noh NJ, Chung H, Yang A-R, Son Y. Soil Nitrogen Transformations and Availability in Upland Pine and Bottomland Alder Forests. Forests. 2015; 6(9):2941-2958.Chicago/Turabian Style
Yoon, Tae K.; Noh, Nam J.; Chung, Haegeun; Yang, A-Ram; Son, Yowhan. 2015. "Soil Nitrogen Transformations and Availability in Upland Pine and Bottomland Alder Forests." Forests 6, no. 9: 2941-2958.