| 引用本文: | 梁 雪,薛 冰,李芳芳,等.基于土壤水分下限和作物耗水强度优化玉米阶段灌水量[J].灌溉排水学报,2025,44(1):17-24. |
| LIANG Xue,XUE Bing,LI Fangfang,et al.基于土壤水分下限和作物耗水强度优化玉米阶段灌水量[J].灌溉排水学报,2025,44(1):17-24. |
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| 摘要: |
| 【目的】基于土壤水分下限和作物耗水强度优化玉米阶段灌水量，为新疆玉米节水增产提供科学指导。【方法】以不同水分梯度下的膜下滴灌玉米为研究对象，研究新疆高产玉米在不同水分处理下的各生育时期适宜计划湿润层深度、耗水规律、产量及水分利用效率，建立以土壤水分下限和作物耗水强度优化灌水量的方法。【结果】玉米拔节期适宜计划湿润层深度为20 cm，大喇叭口期、抽穗期和灌浆期为40 cm。660 mm灌水量下，DH618、XY335玉米品种的水分利用效率较高且产量显著高于其他灌水处理。基于土壤水分下限和作物耗水强度优化高产玉米阶段灌水量的结果为：DH618单次灌水量为51~70 mm，灌水总量为649.5 mm；XY335单次灌水量为39~67.5 mm，灌水总量为629.5 mm。【结论】基于土壤水分下限和作物耗水强度计算灌水量的方法从土壤和作物2个方面共同优化玉米阶段灌水量，更加科学性地分配了各阶段灌水量，提高了水分利用效率。 |
| 关键词: 玉米；土壤水分；计划湿润层；耗水规律；耗水强度 |
| DOI：10.13522/j.cnki.ggps.2024174 |
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| Optimizing irrigation scheduling for maize based on soil moisture threshold and water consumption intensity |
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LIANG Xue, XUE Bing, LI Fangfang, CUI Yirui, MA Yangtao, WEI Changzhou, JIANG Yan
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Shihezi University, Shihezi 832003, China
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| Abstract: |
| 【Objective】Maize is a water-intensive crop, and its production in northwestern China heavily depends on irrigation. Optimising irrigation scheduling is hence essential to improving water use efficiency and conserving water resources. This paper proposes a method to optimise irrigation scheduling for maize cultivation in this region.【Method】Field experiments were conducted in Xinjiang using mulched drip irrigation and high-yield maize varieties (DH618 and XY335) under varying total irrigation amounts. For each irrigation-amount treatment, the experiments evaluated the suitable depth of the wetting soil layer, water consumption, yield, and water use efficiency of the crops during different growth stages. The optimal irrigation amount and scheduling were determined based on these measurements.【Result】For both varieties, the suitable depth of the wetting soil layer was 20 cm at early vegetative growth stage, and 40 cm at late vegetative growth stage, tasseling stage and milk stage. The water use efficiency of both varieties was the highest when total irrigation amount was 660 cm. The optimal irrigation scheduling for the DH618 variety was 51-70 mm in each irrigation with the total irrigation amount being 649.5 mm, while for the XY335 variety, the optimal irrigation was 39-67.5 mm in each irrigation with the total irrigation amount being 629.5 mm.【Conclusion】The proposed method, based on soil moisture thresholds and crop water consumption, provides a more scientifically grounded approach to allocate irrigation water across growth stages. It enhances water use efficiency, conserves water resources, and increases maize yield, offering a valuable strategy for sustainable irrigation management in arid regions. |
| Key words: maize; soil moisture; planned wetted layer; water consumption law; water depletion intensity |
