干旱区地理2025，Vol.48Issue(12)：2099-2110,12.DOI:10.12118/j.issn.1000-6060.2025.036
基于DNDC的春玉米水肥耦合优化方案模拟研究
Simulation study on water and fertilization coupling optimization scheme of spring maize based on DNDC model
摘要
Abstract
To investigate the effects of reducing the use of traditional fertilizers and substituting them with organ-ic fertilizers on the growth of spring maize(Zea mays L.)under different irrigation gradients,we used a combina-tion of field trials and crop growth modeling.Fully(75%-95%of field capacity)and partially(55%-75%of field capacity)irrigated gradients were set.Additionally,three modes of fertilizer addition,traditional,traditional re-duced by one-third,and traditional reduced by one-third+organic fertilizer,were set based on the local fertilizer application rates of 225 kg·hm-2.The effects of different water-fertilizer combinations on the yield and water use efficiency of crops in the Minqin Oasis,Gansu Province,China,could be ascertained based on a quantitative anal-ysis using the DNDC model.The results showed that:(1)The Nash coefficients(ME)of the simulated and mea-sured values of the standard and validation periods during 2022-2023,employing the DNDC model,were in the range of 0.72-0.98,and the coefficients of determination(R2)were>0.80.(2)The validated DNDC model exhib-ited good applicability in simulating the growth rates of maize plants in the Minqin Oasis.(3)The yield under dif-ferent water-fertilizer application scenarios varied;that with T240-40%(40%organic fertilizer)treatment was 1.08%lower than that with T300-40%(40%organic fertilizer)treatment;while water use efficiency and irrigation water use efficiency increased by 17.40%and 23.65%,respectively;and the partial fertilizer productivity improved by 1.07%.T240-40%was the most optimal water-fertilizer treatment scheme.The results of this study can provide a theo-retical basis for improving the water-fertilizer use efficiency of spring maize in the Minqin Oasis.关键词
DNDC模型/玉米/产量/水分利用效率/肥料偏生产力Key words
DNDC model/maize/yield/water use efficiency/partial fertilizer productivity引用本文复制引用
LI Haolin,ZHANG Xuejie,ZHANG Hongjuan,SUN Li'na,SONG Pengcheng,LI Ping..基于DNDC的春玉米水肥耦合优化方案模拟研究[J].干旱区地理,2025,48(12):2099-2110,12.基金项目
民勤县重点研发计划项目(MQ2024KJXM007) （MQ2024KJXM007）
甘肃省水利科学试验研究与技术推广计划项目(23GSLK047) （23GSLK047）
甘肃省科技计划项目(重大项目)(21ZD4NF044)资助 （重大项目）
