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Journal of Environmental Hydrology
ISSN 1058-3912 |
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Electronic Journal of the International Association for
Environmental Hydrology
JEH Volume 17 (2009), Paper 10 Posted April 4, 2009 FIELD-SCALE SIMULATION OF WINTER-WHEAT LEAF AREA INDEX, SOIL MOISTURE AND WATER-USE EFFICIENCY IN WEST HENAN, CHINA
Xianghui Lu1,2 2Melbourne School of Land and Environment, The University of Melbourne, Melbourne, Australia 3International Water Management Institute, Colombo, Sri Lanka 4Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, China 5Luoyang Institute of Agricultural Sciences, Luoyang, China ABSTRACT Crop growth simulation models are useful in evaluating the impacts of different tillage and residue management operations on the changes in land productivity and soil-water balance components. We applied the new Decision Support System for Agro-technology Transfer (DSSAT) version 4.5, an improved crop growth simulation model, to three conservation agriculture treatments and one conventional tillage treatment data from a field-scale study in the west Henan region of China to predict winter-wheat yield, leaf area index and soil-water balance. The area has a winter wheat-fallow-winter wheat rotation with winter wheat planting in October and harvesting in June. The model was calibrated using 2005-2006 winter-wheat crop data from field experiments of four treatments. The DSSAT satisfactorily simulated the treatment variations in winter-wheat yield, leaf area index and soil-water balance. There was good agreement between observed and predicted yields. Although the results show that the DSSAT V4.5 is well suited for simulating winter-wheat growth in the West Henan region of China, these results are preliminary and based on only one year of experimental data and four treatments. Further long-term analyses need to be carried out for improving the understanding of the conservation agriculture cropping systems in the west Henan region of China. Reference: Lu, X., V.Nangia, X. Mu, F. Wang, Y. Sui, P. Gao, and Y. Yao. 2009. Field-scale simulation of winter-wheat leaf area index, soil moisture and water-use efficiency in West Henan, China . Journal of Environmental Hydrology, Vol. 17, Paper 10. CONTACT: Prof. Xingmin Mu Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling 712100 China E-mail: xmmu@ms.iswc.ac.cn |
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