Assessing Impacts of Long-Term Maize-Cultivation Using the 'Dynamic of Total Carbon and Nitrogen Distribution' Model
Thanh Thi Nguyen1,3, Melvin Lippe2, Carsten Marohn1, Vien Duc Tran3, Georg Cadisch1
1University of Hohenheim, Inst. of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), Germany
Ongoing population growth spurred the demand of agricultural land further accompanied by agricultural intensification in Northwest Vietnam. This trend led to an expansion of mono-maize cultivation areas to steep sloping environments with the result of severe soil degradation. Against this background, the presented study evaluated the development of soil fertility under mono-cropped maize cultivation in Northwest Vietnam to offer decision support for natural resource management at watershed level. The specific objectives were: (1) determining the dynamics of total Nitrogen (NTot) and Carbon (CTot) under current maize cultivation regimes along selected transect gradients, and (2) developing the spatially-explicit Dynamic of total Carbon and Nitrogen Distribution (DyCNDis) model to assess potential impacts of CTot and NTot development after long-term and intensified maize cultivation patterns using Chieng Khoi watershed as an example.
Keywords: Carbon, long-term maize, model, nitrogen
Contact Address: Thanh Thi Nguyen, University of Hohenheim, Inst. of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), Garbenstr. 13, 70599 Stuttgart, Germany, e-mail: nguyenthanh0406gmail.com