Topsoil N-budget model in orchard farming to evaluate groundwater nitrate contamination

International Conference on Eco Engineering Development 2017

生态环境科学

Wijayanti, Yureana^1 ; Budihardjo, Kadarwati^1 ; Sakamoto, Yasushi^2 ; Setyandito, Oki^3

Department of Agriculture, Faculty of Agriculture, Institute of Agriculture Stiper (INSTIPER), Yogyakarta, Indonesia^1

Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi

400-8511, Japan^2

Department of Civil Engineering, Faculty of Engineering, Bina Nusantara University, Jakarta

11480, Indonesia^3

关键词: Field research;    Groundwater nitrates;    Nitrate contamination;    Nitrate leaching;    Nitrogen leaching;    Potential sources;    Small scale;    Transport process;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/109/1/012034/pdf
DOI  :  10.1088/1755-1315/109/1/012034

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A small scale field research was conducted in an orchard farming area in Kofu, Japan, where nitrate contamination was found in groundwater. The purpose of assessing the leaching of nitrate in this study is to understand the transformation and transport process of N-source in topsoil that leads to nitrate contamination of groundwater. In order to calculate N-budget in the soil, the model was utilized to predict the nitrogen leaching. In this res earch, the N-budget model was modified to evaluate influence of precipitation and application pattern of fertilizer and manure compost. The result shows that at the time before the addition of manure compost and fertilizer, about 75% of fertilizer leach from topsoil. Every month, the average remaining nitrate in soil from fertilizer and manure compost are 22% and 50%, respectively. The accumulation of this monthly manure compost nitrate, which stored in soil, should be carefully monitored. It could become the potential source of nitrate leaching to groundwater in the future.