| 引用本文: | 马建琴,何沁雪,刘 蕾.双目标条件下玉米水肥耦合效应分析及配施方案优化研究[J].灌溉排水学报,2021,(10):58-63. |
| MA Jianqin,HE Qinxue,LIU lei.双目标条件下玉米水肥耦合效应分析及配施方案优化研究[J].灌溉排水学报,2021,(10):58-63. |
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| 摘要: |
| 【目的】探究玉米产量和水分利用率的水肥耦合效应以及求出生育期最佳水肥方案。【方法】首先利用二元二次回归分析建立了玉米产量与水分利用率的水肥耦合模型，分析水、肥二因子的耦合效应；随后建立产量和水分利用率的双目标优化模型，采用快速非支配排序遗传算法II(NSGA-II)对模型进行求解。【结果】玉米产量和水分利用率随着水肥二因子的增加呈先增后减趋势；灌水对玉米产量和水分利用率的影响程度大于施肥；水肥耦合对玉米产量和水分利用率有正交互作用。【结论】提出的水肥配施方案：灌水量为848.24 m3/hm2，施肥量为192.66 kg/hm2的水肥组合较优玉米产量为10 667.52 kg/hm2，水分利用率为3.11 kg/m3。 |
| 关键词: 玉米；水肥耦合；双目标优化；NSGA-Ⅱ算法；配施方案 |
| DOI：10.13522/j.cnki.ggps.20202036 |
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| Optimizing Irrigation and Fertilization Coupling to Balance the Improvement of Yield and Water Use Efficiency of Summer Maize |
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MA Jianqin, HE Qinxue*, LIU lei
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(North China University of Water Resources and Electric Power, Zhengzhou 450011, China)
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| Abstract: |
| 【Background and objective】Water scarcity and non-point pollution are double whammies facing agricultural production in north China. Optimizing irrigation and fertilization to make agriculture greener and more energy-efficient is hence critical to sustaining food production. Henan province is one of the key agricultural production bases in China, and agriculture in most regions across the province relies on irrigation. The objective of this paper is to analyse how to improve economic and productive benefits by balancing irrigation and fertigation amount in these regions.【Method】Summer maize was taken as the example as it is a staple crop in the province. We considered three irrigation treatments and three fertilizations. Based on data obtained from irrigation and fertilization experiments, we first derived a regression model to quantify the dependence of crop yield and water use efficiency (WUE) on irrigation amount and fertilization amount, from which we further analysed the single-factor effect, marginal effect and coupling effect of irrigation and fertilization amounts on yield and WUE of the crop. The optimal irrigation and fertigation amounts for balancing the yield and WUE of the crop was solved using the non-dominated sorted genetic algorithm-II (NSGA-II) method.【Result】 ①With the increase in irrigation and fertigation amounts, the yield and WUE of the crop increased first followed by a decline when their application rates exceeded their respective threshold values. ②Overall, the effects of soil water on yield and WUE of the crop were greater than that of fertilizer. ③ Water and fertilizer coupling positively impacted on maize yield and its WUE.【Conclusion】The optimal coupling of water and fertilizer application obtained in this paper for maize production in Henan province is as follows: irrigation amount 848.24 m3/hm2, ferlization amount 192.66 kg/hm2. Under these conditions, the maize yield was 10 667.52 kg/hm2 and its associated WUE was 3.11 kg/m3. |
| Key words: maize; water and fertilizer coupling; Bi-objective optimization; Non-Dominated Sorting Genetic Algorithm-II; matching scheme |
