Journal article
Modeling nitrate leaching and optimizing water and nitrogen management under irrigated maize in desert Oases in northwestern China
K Hu, Y Li, W Chen, D Chen, Y Wei, R Edis, B Li, Y Huang, Y Zhang
Journal of Environmental Quality | Published : 2010
DOI: 10.2134/jeq2009.0204
Abstract
Understanding water and N transport through the soil pro. le is important for effcient irrigation and nutrient management to minimize nitrate leaching to the groundwater, and to promote agricultural sustainable development in desert oases. In this study, a process-based water and nitrogen management model (WNMM) was used to simulate soil water movement, nitrate transport, and crop growth (maize [Zea mays L.]) under desert oasis conditions in northwestern China. The model was calibrated and validated with a field experiment. The model simulation results showed that about 35% of total water input and 58% of the total N input were leached to <1.8 m depth under traditional management practice. E..
View full abstractGrants
Awarded by National High-Tech Research and Development Program of China
Awarded by National Key Basic Research Special Funds
Awarded by Non-profit Research Foundation for Agriculture
Awarded by China-Australia Cooperation Project
Awarded by Program for New Century Excellent Talents in University
Funding Acknowledgements
The study was funded by the National High-Tech Research and Development Program of China (2007AA10Z217), the National Key Basic Research Special Funds (2009CB118607), Non-profit Research Foundation for Agriculture (200803036), the China-Australia Cooperation Project ACIAR (Australia Centre for International Agricultural Research) (LWR/2003/039), and Program for New Century Excellent Talents in University (NCET-07-0809). We thank Dr. Debra Turner for providing the results of gaseous emissions. We are grateful to Dr. Ian Willet for help with revising this manuscript. The authors are also grateful to the reviewers for their construct comments and revisions on this manuscript.