Journal of Ecology and Rural Environment ›› 2009, Vol. 25 ›› Issue (1): 62-68.doi: CNKI:SUN:NCST.0.2009-01-012
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LI Xiao-Peng, ZHANG Jia-Bao, ZHU An-Ning, XIN Xiu-Li, ZHANG Cong-Zhi, HUANG Ping
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Abstract: A water and nitrogen management model(WNMM) was used to simulate the soil water and nitrogen dynamics in fluvo-aquic soil,with a view to establishing a scheme to optimize soil water and nitrogen in light of local climate and soil properties.The model was validated by field experiments in fluvo-aquic soil.Results show that the model did good in simulating water and nitrogen dynamic.The simulated values of evaportranspiration,soil water and nitrate content displayed significant correlation(α=0.01) with measured values,and the deviation are acceptable.Based on real-time data of soil water and nitrogen content,an optimal irrigation and fertilization scheme was figured out.Under the average climate conditions of years,the scheme could not only provide a preferable soil environment for crop growth,but also save irrigation water by 163.5 mm and nitrogen fertilizer by 130 kg·hm-2 and decrease soil water and nitrogen leaching by 264.6 mm and 71.1 kg·hm-2,respectively,each year.
Key words: fluvo-aquic soil, soil water and nitrogen dynamics, water and nitrogen management model(WNMM), optimal management pattern
CLC Number:
S181
LI Xiao-Peng, ZHANG Jia-Bao, ZHU An-Ning, XIN Xiu-Li, ZHANG Cong-Zhi, HUANG Ping. WNMM-Model-Based Optimization of Soil Water and Nitrogen Management in Fluvo-Aquic Soil[J]. Journal of Ecology and Rural Environment, 2009, 25(1): 62-68.
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http://www.ere.ac.cn/EN/Y2009/V25/I1/62