Agricultural Water Management最新文献_第6页

A review of artificial intelligence applications for predicting crop performance and enhancing food security under drought-induced water stress 人工智能在干旱胁迫下作物生产性能预测和粮食安全中的应用综述

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-02-10 DOI: 10.1016/j.agwat.2026.110212

Ali Fares, Anoop Valiya Veettil, Atikur Rahman, Ripendra Awal

Artificial Intelligence (AI) has emerged as a vital tool for predicting crop performance, including crop growth, diseases, and yield, and assisting in informed decision-making, such as predicting precise water management practices for sustainable water use, thereby maximizing growers’ profits. Climate change and the increasing frequency of severe droughts have significantly affected crop yields, posing a challenge to global food security. Therefore, predicting crop performance, particularly expected yield, is crucial during water stress. AI algorithms, including Random Forest (RF), Gradient Boosting Machines (GBM), Artificial Neural Networks (ANNs), and Convolutional Neural Networks (CNNs), enable the integration of weather, soil, crop, and irrigation management data to predict crop performance under drought with higher accuracy. This review focuses on the applications of AI-based models in quantifying the impact of drought on crop performance, considering nonlinear soil–plant–atmosphere interactions and the integration of spatial data through remote sensing. However, data limitations, modeling dynamic drought responses, and addressing spatial heterogeneity in drought indices pose significant challenges for AI-based predictions. Case studies demonstrate AI's potential to predict crop yields under drought conditions, with applications ranging from traditional machine learning (ML) models to advanced deep learning (DL) frameworks. However, there is no clear consensus on the best AI model for drought-induced water stress management, although ANNs and RFs are more commonly used than others in precision-based irrigation and crop yield prediction. DL-based models, such as CNN and Long Short-Term Memory (LSTM), are less frequently applied, despite their strengths in handling complex and unstructured data, as well as modeling long-term drought impacts. Refining AI algorithms to support precision irrigation scheduling, integrating AI with conventional water management practices, and enabling data-driven decision support systems will be vital for mitigating the adverse effects of drought on crop performance.

人工智能（AI）已经成为预测作物性能（包括作物生长、病害和产量）的重要工具，并协助做出明智的决策，例如预测精确的水资源管理实践，以实现可持续用水，从而使种植者的利润最大化。气候变化和日益频繁的严重干旱严重影响了作物产量，对全球粮食安全构成挑战。因此，在缺水条件下预测作物性能，特别是预期产量是至关重要的。包括随机森林（RF）、梯度增强机（GBM）、人工神经网络（ANNs）和卷积神经网络（cnn）在内的人工智能算法，能够整合天气、土壤、作物和灌溉管理数据，以更高的精度预测干旱条件下的作物表现。本文综述了基于人工智能模型在考虑土壤-植物-大气非线性相互作用和遥感空间数据整合的干旱对作物生产影响量化方面的应用。然而，数据限制、干旱动态响应建模以及干旱指数的空间异质性对基于人工智能的预测构成了重大挑战。案例研究表明，人工智能在干旱条件下预测作物产量的潜力，应用范围从传统的机器学习（ML）模型到高级深度学习（DL）框架。然而，尽管人工神经网络和RFs在基于精确的灌溉和作物产量预测中比其他模型更常用，但对于干旱诱导的水胁迫管理的最佳人工智能模型尚无明确的共识。基于dl的模型，如CNN和长短期记忆（LSTM），尽管它们在处理复杂和非结构化数据以及模拟长期干旱影响方面具有优势，但应用频率较低。改进人工智能算法以支持精确灌溉调度，将人工智能与传统的水管理实践相结合，以及启用数据驱动的决策支持系统，对于减轻干旱对作物性能的不利影响至关重要。

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引用次数: 0

Spatial distributed management strategies for maize high-yield and high-efficiency under different production-demand scenarios in Northwest China 西北不同生产需求情景下玉米高产高效空间分布管理策略

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-17 DOI: 10.1016/j.agwat.2026.110166

Honghang Zhang , Chuanbin Liang , Wenxin Zhang , Manoj Shukla , Yu Fang , Shichao Chen , Taisheng Du

Rapid warming and increasingly stringent water allocations in arid Northwest China have exacerbated the inherent trade-offs among maize yield, water productivity (WP_c) and economic returns. This study employed a statistical modeling-optimization pipeline (PLS-GA) and a machine learning-optimization pipeline (RF-GA) to build a framework for better maize production in the Hexi Corridor of Gansu Province, an arid region in northwest China. The framework uses yield and actual evapotranspiration (ET_{c act}) prediction as well as multi-objective optimization calculations. The optimal irrigation, nitrogen application, and planting density were proposed for five production-demand scenarios and the consequent impacts on yield, WP_c, and economic returns under future climate change were systematically assessed. Results showed that random forest (RF) outperformed partial least squares (PLS) regression in capturing non-linear relationships (R²= 0.80 vs. 0.51) for yield simulation, whereas PLS provided superior explanatory power for individual factors. Findings also showed that all scenarios in the historical period could have benefited from an increase in planting density by at least 13.1 % and precision planting, leading to improvements in yield, WP_c, and economic returns of at least 20.2 %, 31.4 %, and 15.1 %, respectively, alongside reductions in nitrogen application and irrigation of at least 13.7 % and 6.3 %, respectively. During mid-century (2041–2050), planting density and irrigation were projected to decline 0.4–1.1 % and 0.1–3.5 %, respectively, while nitrogen application to increase by 4.7–9.9 %. These adaptive measures lead to enhanced yield (5.8–6.2 %) and economic returns (13.8–14.7 %), albeit with a decline in WP_c (13.1–14.5 %). This study presents an integrated maize management strategy that simultaneously optimizes grain yield, WP_c, and economic returns in the Hexi Corridor, while also contributing a scalable methodological framework for advancing climate-resilient agricultural practices in arid, irrigated agroecosystems of Northwest China and comparable regions.

中国西北干旱地区的快速变暖和日益严格的水资源分配加剧了玉米产量、水分生产力和经济效益之间的内在权衡。本研究采用统计建模-优化管道（PLS-GA）和机器学习-优化管道（RF-GA）构建了中国西北干旱区甘肃省河西走廊玉米优化生产的框架。该框架采用产量和实际蒸散量预测以及多目标优化计算。提出了5种生产需求情景下的最佳灌溉、施氮量和种植密度，并系统评估了未来气候变化对产量、WPc和经济回报的影响。结果表明，随机森林（RF）在捕获非线性关系（R2= 0.80 vs. 0.51）的产量模拟方面优于偏最小二乘（PLS）回归，而PLS对单个因素提供了更好的解释能力。研究结果还表明，在历史时期的所有情景中，种植密度至少增加13.1% %和精确种植都可以使产量、WPc和经济回报分别提高至少20.2% %、31.4% %和15.1% %，同时氮肥施用和灌溉分别减少至少13.7% %和6.3% %。本世纪中叶（2041 ~ 2050年），预计种植密度和灌溉分别下降0.4 ~ 1.1 %和0.1 ~ 3.5 %，施氮量增加4.7 ~ 9.9 %。这些适应性措施提高了产量（5.8-6.2 %）和经济回报（13.8-14.7 %），尽管WPc下降了（13.1-14.5 %）。本研究提出了一种玉米综合管理策略，可同时优化河西走廊的粮食产量、WPc和经济回报，同时也为促进西北干旱灌溉农业生态系统的气候适应性农业实践提供了可扩展的方法框架。

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引用次数: 0

Spatio-temporal HYDRUS-1D soil water balance simulations as support for precision irrigation in North-Eastern Germany 德国东北部HYDRUS-1D土壤水分平衡时空模拟：为精准灌溉提供支持

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-02-05 DOI: 10.1016/j.agwat.2026.110157

Jan Lukas Wenzel , Christopher Conrad , Talha Mahmood , Matthias Kunz , Martin Volk , Julia Pöhlitz

Accurate spatio-temporal information on the soil water balance is critical for an efficient and sustainable irrigation. Large effort requirements limit the applicability of complex simulations for precision irrigation. The spatially distributed application of one-dimensional models can reconcile the need for precise soil water balance simulations with the complexity of root-zone water flow processes. This study uses HYDRUS-1D to simulate the daily depth-specific (0 cm to 60 cm, in 10 cm increments) soil water balance from 1st April to 30th September 2021 (2022). Simulations at 70 m spatial resolution covered a 1600 ha farm in Mecklenburg-Western Pomerania, Germany. Results were validated against in-situ soil water content (SWC) and two remotely-sensed SWC data sets (“Soil Moisture Active Passive”, SMAP; Sentinel-1, S1-SWC). Further analysis explored crop-specific irrigation efficiencies and potential farm-scale water savings. Spatially distributed HYDRUS-1D simulations showed good accuracy compared to in-situ SWC (RMSE_mean = 0.020 m³ m⁻³; MAE_mean = 0.017 m³ m⁻³; R²_mean = 0.676; bias = −0.008 m³ m⁻³). The agreement with remotely-sensed SWC was moderate to weak (RMSE_mean = 0.059 (0.150) m³ m⁻³, MAE_mean = 0.049 (0.123) m³ m⁻³, R²_mean = 0.208 (0.141), mean bias = 0.021 (0.108) m³ m⁻³ for SMAP (S1-SWC)). Irrigation efficiencies were 65.0 % (potato), 47.3 % (wheat), 40.5 % (rye), and 58.2 % (sugar beet). Potential water savings amounted to 87,006.9 m³ (11.2 % of total irrigation water; 2021) and 71,396.6 m³ (10.4 %; 2022). The proposed approach reduces the trade-offs between accurately representing the soil water balance in the root-zone and keeping the practical effort reasonable.

准确的土壤水分平衡时空信息是实现高效、可持续灌溉的关键。大的工作量限制了复杂模拟对精确灌溉的适用性。一维模型在空间分布上的应用，可以满足精确土壤水分平衡模拟的需要和根区水流过程的复杂性。本研究利用HYDRUS-1D模拟了2021（2022）年4月1日至9月30日土壤水分平衡的日深度（0 cm至60 cm，增量为10 cm）。70 米空间分辨率的模拟覆盖了德国梅克伦堡-西波美拉尼亚一个1600 公顷的农场。利用原位土壤含水量（SWC）和两个遥感土壤含水量数据集（“土壤水分主动被动”，SMAP; Sentinel-1, S1-SWC）对结果进行验证。进一步的分析探讨了特定作物的灌溉效率和潜在的农场规模节水。与原位SWC相比，空间分布的HYDRUS-1D模拟具有较好的精度（RMSEmean = 0.020 m3 m−3;MAEmean = 0.017 m3 m−3;R2mean = 0.676; bias = - 0.008 m3 m−3）。SMAP （S1-SWC）与遥感SWC的一致性为中弱(RMSEmean = 0.059 (0.150) m3 m−3,MAEmean = 0.049 (0.123)m3 m−3,R2mean = 0.208（0.141)，平均偏差= 0.021 (0.108)m3 m−3）。灌溉效率分别为65.0% %（马铃薯）、47.3% %（小麦）、40.5% %（黑麦）和58.2% %（甜菜）。节水潜力分别为87,006.9 m³ （占2021年灌溉水量的11.2 %）和71,396.6 m³ （10.4 %；2022年）。该方法减少了准确表征根区土壤水分平衡与保持实际工作合理性之间的权衡。

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引用次数: 0

From past to future: Spatiotemporal insights into drought stress on Belgian pome fruit production for 1991–2090 从过去到未来：1991-2090年干旱胁迫对比利时梨果生产的时空影响

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-16 DOI: 10.1016/j.agwat.2026.110151

Brecht Bamps , Anne Gobin , Ben Somers , Jos Van Orshoven

Recurring drought episodes cause significant economic losses and uncertainty in the Belgian pome fruit sector, requiring effective risk management strategies. Considering the expected increase in frequency, intensity and duration of drought episodes, our study focuses on quantifying the associated location-specific hazard for apple and pear orchards in Belgium. A spatially distributed implementation of the growth model AquaCrop was used to calculate a daily soil water balance at a 12.5 × 12.5 km spatial resolution based on nine bias corrected regional climate model projections from the EURO-CORDEX ensemble for emission scenarios RCP4.5 and RCP8.5. The spatiotemporal evolution of the precipitation deficit (mm), transpiration deficit (mm) and net irrigation requirement (mm) were used to assess current and future meteorological and agricultural drought hazards. We find a spatially averaged increase of the transpiration deficit of 61.4% (39.0%) and the net irrigation requirement of 32.3 % (18.5%) comparing a period in the far future (2061–2090) to a baseline period (1991–2020) under scenario RCP8.5 (RCP4.5). In addition, corresponding interquartile ranges of 204.2% (77.6%) and 30.8% (10.3%) show a large inter-climate model variability in the simulation results. The projected increase of the precipitation deficit during the summer months causes agricultural drought in a spatially heterogeneous manner, relating to the soil total available water content and depth to the shallow groundwater table. Despite the overall increase in drought hazard, the suitability of the current production regions is not projected to change relative to other agricultural regions in Belgium regarding agricultural drought.

经常性的干旱给比利时的梨类水果部门造成重大的经济损失和不确定性，需要有效的风险管理战略。考虑到预计干旱事件的频率、强度和持续时间会增加，我们的研究重点是量化比利时苹果和梨果园相关的特定地点危害。利用生长模式AquaCrop的空间分布式实现，基于EURO-CORDEX系统对RCP4.5和RCP8.5排放情景的9个校正偏差的区域气候模式预估，计算了12.5 × 12.5 km空间分辨率下的日土壤水分平衡。利用降水亏缺量（mm）、蒸腾亏缺量（mm）和净灌溉需要量（mm）的时空演变特征来评估当前和未来的气象和农业干旱灾害。研究发现，在RCP8.5 （RCP4.5）情景下，远未来时期（2061-2090）与基准期（1991-2020）相比，蒸腾亏缺的空间平均增幅为61.4%(39.0%)，净灌溉需水量为32.3% %（18.5%）。另外，对应的四分位数区间为204.2%（77.6%）和30.8%(10.3%)，在模拟结果中表现出较大的气候间模式变率。预估夏季降水亏缺的增加导致农业干旱的空间异质性，与土壤总有效含水量和浅层地下水位深度有关。尽管干旱灾害总体上有所增加，但预计当前生产区在农业干旱方面相对于比利时其他农业区的适宜性不会发生变化。

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引用次数: 0

Impact of the soil freeze-thaw process on runoff generation and water balance in an alpine region of the northeast Qinghai-Tibet plateau 青藏高原东北高寒地区土壤冻融过程对产流和水分平衡的影响

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-27 DOI: 10.1016/j.agwat.2026.110191

Linshan Yang , Jingru Wang , Tiaoxue Lu , Wanghan He , Xingyi Zou , Honghua Xia , Raffaele Albano , Bogdan Ozga-Zielinski , Jan Adamowski , Qi Feng

The soil freeze-thaw process profoundly influences runoff generation through complex and interconnected mechanisms, yet its quantitative impact remains poorly understood, particularly across different vegetation types and elevations. Addressing this issue is critical for improving hydrological predictions in cold regions. In this study, we established an integrated atmosphere-vegetation-soil observation system across varying elevations and vegetation types in the Qilian Mountains (QLM) and employed the Simultaneous Heat and Water (SHAW) model to quantitatively assess soil hydrothermal dynamics and runoff generation during different freeze-thaw stages from 2015 to 2023. The results demonstrate that the SHAW model could accurately simulate soil hydrothermal processes across all vegetation types (NSE > 0.80 for soil temperature; NSE > 0.69 for soil moisture) in an alpine region. Soil water content and water balance components varied significantly across both freeze-thaw stages and vegetation types. There was almost no surface runoff formed in desert steppe and mountainous steppe, and deep seepage was also low. In contrast, shrub meadow exhibited substantial deep seepage (89.29 mm) during the completely thawed stage and could be a major source of recharging to streamflow. The major water fluxes for the four vegetation types occurred during thawing and completely thawed stages, dominated by evapotranspiration. Evapotranspiration accounted for 93 %, 94 %, 81 %, and 62 % of annual precipitation in desert steppe, mountainous steppe, coniferous forest, and shrub meadow, respectively. While the component of evapotranspiration differed, it was dominated by soil evaporation in desert steppe (79 % of total ET) and mountainous steppe (92 %), and by vegetation transpiration in coniferous forest (59 %) and shrub meadow (78 %). These findings offer critical insights into water partitioning within the soil-vegetation-atmosphere continuum, enabling more accurate predictions of streamflow and water availability in alpine regions.

土壤冻融过程通过复杂和相互关联的机制深刻地影响径流生成，但其定量影响仍然知之甚少，特别是在不同植被类型和海拔之间。解决这一问题对于改善寒冷地区的水文预测至关重要。本研究在祁连山地区建立了不同海拔和不同植被类型的大气-植被-土壤综合观测系统，采用同步热水（SHAW）模型对2015 - 2023年不同冻融阶段土壤热液动力学和产流进行了定量评价。结果表明，SHAW模型能准确模拟高寒地区所有植被类型的土壤热液过程（土壤温度NSE >； 0.80，土壤湿度NSE >； 0.69）。土壤含水量和水分平衡组分在不同冻融阶段和不同植被类型间存在显著差异。荒漠草原和山地草原几乎没有地表径流形成，深层渗流也较低。灌丛草甸在完全融化阶段表现出较大的深度渗流（89.29 mm），可能是径流补给的主要来源。4种植被类型的水通量主要发生在融化和完全融化阶段，以蒸散发为主。荒漠草原、山地草原、针叶林和灌丛草甸的蒸散发分别占年降水量的93 %、94 %、81 %和62 %。土壤蒸腾在荒漠草原（占总蒸散发的79 %）和山地草原（占92 %）以及针叶林（59 %）和灌丛草甸（78 %）以土壤蒸腾为主。这些发现为土壤-植被-大气连续体中的水分分配提供了重要的见解，使我们能够更准确地预测高寒地区的河流流量和水分可用性。

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引用次数: 0

Effects of deficit irrigation at different phenological periods on yield, quality, and water productivity of Xanthoceras sorbifolium Bunge in the Horqin Sandy Land of China 不同物候期亏缺灌溉对科尔沁沙地文冠果产量、品质和水分生产力的影响

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-16 DOI: 10.1016/j.agwat.2026.110130

Shuqin Song , Benye Xi , Yang Liu , Jing Zhong , Xiaoxia Wang , Liming Jia

In arid and semi-arid regions, improving water efficiency is imperative for the sustainable advancement of both forestry and agriculture. The water demand period for Xanthoceras sorbifolium Bunge, an economically and ecologically important tree grown in the Horqin Sandy Land of China, is unknown. This knowledge gap has hindered the development of optimized deficit irrigation (DI) schemes aimed at conserving water while maintaining yield and quality. To identify this key period and better understand the water-use dynamics of this species, we conducted a two-year field experiment (2021–2022). Eight irrigation treatments were applied across three key phenological stages: flowering (F), fruit setting to expansion (S), and fruit-expansion to maturity (M). The irrigation treatments included full-stage (FSM), two-stage (FS, FM, and SM), single-stage (F, S, and M), and no irrigation (NI). The application of DI decreased fruit yields by 8.36–58.01 % (p < 0.05), while two-stage irrigation significantly reduced water consumption and evapotranspiration compared with full-stage irrigation (p < 0.01). FS significantly improved water productivity (

WP

), irrigation water productivity (

{WP}_{I}

), and fruit quality. All two-stage irrigation treatments demonstrated yield response factors (

k_{y}

) < 1. The FS treatment reduced irrigation volume by 43.7 %, while the yield decreased by only 8.36 %, suggesting that the irrigation savings did not significantly compromise yield. In summary, the FS treatment is recommended as the most optimal irrigation schedule, followed by SM and FM, for the production of X. sorbifolium in drylands. This approach conserves water while minimally impacting productivity, thus representing a sustainable water management strategy.

在干旱和半干旱地区，提高用水效率对于林业和农业的可持续发展至关重要。中国科尔沁沙地上生长着一种具有重要经济和生态意义的乔木——文冠（Xanthoceras sorbifolium Bunge），其需水周期尚不清楚。这种知识差距阻碍了旨在节水同时保持产量和质量的优化亏缺灌溉（DI）方案的发展。为了确定这一关键时期，更好地了解该物种的水分利用动态，我们进行了为期两年的野外试验（2021-2022）。8个灌溉处理跨越3个物候阶段：开花(F)、坐果至膨大(S)和果实膨大至成熟(M)。灌溉处理包括全阶段（FSM）、两阶段（FS、FM和SM）、单阶段（F、S和M）和不灌溉（NI）。直接灌水使果实产量降低了8.36 ~ 58.01 % (p <； 0.05)，两期灌溉较全期灌溉显著降低了耗水量和蒸散量（p <； 0.01）。FS显著提高了水分生产力（WP）、灌溉水分生产力（WPI）和果实品质。所有两期灌溉处理均表现出产量响应因子（ky） < 1。FS处理减少了43.7%的灌水量，而产量仅下降了8.36%，表明节水对产量没有显著影响。综上所述，旱地枸杞生产的最佳灌溉方式为FS处理，其次为SM和FM处理。这种方法节约用水，同时对生产力的影响最小，因此是一种可持续的水管理战略。

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引用次数: 0

Integrating water evaluation and adaptation planning with enhanced sustainable development goals impact assessment for sustainable irrigation optimization in water stressed agricultural basin 将水资源评价与适应规划与强化可持续发展目标相结合，实现水资源紧张农业流域可持续灌溉优化

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-22 DOI: 10.1016/j.agwat.2026.110132

Naveed Ahmed , Jiang Ming , Youssef M. Youssef , Shahid Ali , Nassir Alarifi , Waqas Ul Hussan , Faten Nahas , Mahmoud E. Abd-Elmaboud

This study advances prior approaches by integrating Water Evaluation and Adaptation Planning (WEAP) modelling with a novel Enhanced Sustainable Development Goals (SDG) Impact Assessment Framework (ESIAF) to holistically evaluate irrigation scenarios in water-stressed agricultural regions such as the Indus Basin. Applied to the Chaj Doab region within Pakistan's Indus Basin, this research fills a critical gap in canal-specific, SDG-linked planning for water-stressed agricultural regions. In this integrated approach, the WEAP model simulated physical system responses, quantifying that the optimal scenario (Scenario 3) improves water-use efficiency by 32.4 % (to 67.55 kg/m³) and increases crop yields by 74 %. The ESIAF sustainability assessment reveals this scenario achieves a Final Sustainability Score (FSS) of 0.66 with a Sustainability Balance Index (SBI) of 0.86, demonstrating robust alignment with SDG 6 (Clean Water and Sanitation), SDG 2 (Zero Hunger), and SDG 8 (Decent Work and Economic Growth). Conversely, climate change projections (Scenario 5) indicate system reliability could plummet to 34–35 %, underscoring the urgency of adaptive measures. The WEAP-ESIAF coupling provides a replicable decision-support tool that offers direct insights for implementing Pakistan's National Water Policy (2018) and guiding sustainable irrigation investments in semi-arid, glacier-dependent basins.

本研究通过将水资源评估和适应规划（WEAP）模型与新的增强型可持续发展目标（SDG）影响评估框架（ESIAF）相结合，对印度河流域等水资源紧张农业区的灌溉情景进行了全面评估，从而推进了先前的方法。该研究应用于巴基斯坦印度河流域的Chaj Doab地区，填补了水资源紧张农业区与运河相关的可持续发展目标规划的关键空白。在这种综合方法中，WEAP模型模拟了物理系统响应，量化了最佳方案（方案3）将水利用效率提高了32.4% %（至67.55 kg/m³），并将作物产量提高了74 %。ESIAF可持续性评估显示，该情景的最终可持续性得分（FSS）为0.66，可持续性平衡指数（SBI）为0.86，与可持续发展目标6（清洁水和卫生设施）、可持续发展目标2（零饥饿）和可持续发展目标8（体面工作和经济增长）保持一致。相反，气候变化预测（情景5）表明，系统可靠性可能暴跌至34-35 %，强调了适应性措施的紧迫性。weapon - esiaf耦合提供了一种可复制的决策支持工具，为实施巴基斯坦国家水资源政策（2018年）和指导半干旱、依赖冰川的流域的可持续灌溉投资提供了直接见解。

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引用次数: 0

Response of soil water–salt distribution and maize growth to aerated subsurface drip irrigation in saline soils 盐碱地土壤水盐分布及玉米生长对加气地下滴灌的响应

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-22 DOI: 10.1016/j.agwat.2026.110173

Wenxiu Li , Kai Chang , Xiangping Wang , Changcheng He , Qiancheng Gao , Rongjiang Yao , Wenping Xie , Dongxiang Ma , Hai Zhu , Wei Zhu

Aerated subsurface drip irrigation (ASDI) is a promising strategy for improving crop productivity in saline soils, yet its effects on root–zone water–salt dynamics and crop adaptation remain unclear. Here, based on a two–year field experiment, we assessed the effects of ASDI on soil water–salt distribution, root development, crop yield, and irrigation water productivity under conventional (W₁) and 20 % water–saving (W_0.8) irrigation regimes, each combined with two dissolved oxygen concentrations (12 and 20 mg /L), using non–aerated irrigation as the control (CK). ASDI improved the soil water–salt environment by enhancing water storage, infiltration, and salt suppression, with salinity responses showing clear irrigation–dependent and temporal patterns. Under W₁, aeration consistently reduced salt accumulation over two seasons, maintaining soil salt storage below CK. The initially smaller low–salinity zone under W₁ compared with W_0.8 likely reflected feedbacks between root growth and water–salt redistribution. In contrast, under W_0.8, the low–salinity zone progressively contracted by 2024, accompanied by soil salt storage exceeding CK, indicating a potential risk of salt accumulation under sustained water–saving irrigation. Increasing the aeration mitigated this trend and enhanced soil enzyme activity. An improved root–zone environment promoted root development, increasing the maximum root density by 16 % and other root traits. These responses sustained grain yield under water–saving conditions, while increasing the harvest index by 2.5 % and irrigation water productivity by 25.0 %. Overall, aeration alleviated salt accumulation and supported crop performance, while its longer–term effectiveness under continuous water–saving requires further validation.

加气地下滴灌（ASDI）是提高盐碱地作物生产力的一种有前景的策略，但其对根区水盐动态和作物适应性的影响尚不清楚。在此，基于为期两年的田间试验，我们评估了ASDI对土壤水盐分布、根系发育、作物产量和灌溉水生产力的影响，在常规（W1）和20% %节水（W0.8）灌溉方案下，每个方案都结合两种溶解氧浓度（12和20 mg /L），以无通气灌溉为对照（CK）。ASDI通过加强水分储存、入渗和抑盐等措施改善了土壤水盐环境，其盐度响应具有明显的灌溉依赖和时间模式。在W1条件下，通气连续两季减少了土壤盐分积累，使土壤盐分储量保持在CK以下。与W0.8相比，W1初始低盐度区较小，可能反映了根系生长与水盐再分配之间的反馈。W0.8条件下，到2024年，低盐区逐渐收缩，土壤盐储量超过CK，表明持续节水灌溉存在积盐风险。增加曝气量可以缓解这一趋势，提高土壤酶活性。根区环境的改善促进了根系发育，最大根密度提高了16% %，其他根系性状也有所提高。这些响应维持了节水条件下的粮食产量，同时使收获指数提高了2.5 %，灌溉水生产力提高了25.0 %。总体而言，曝气缓解了盐积累，有利于作物生产，但在持续节水条件下，其长期有效性有待进一步验证。

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引用次数: 0

The dominant effect of atmospheric drought on carbon and water fluxes in Central Asia and the response of critical thresholds 大气干旱对中亚地区碳和水通量的主导效应及临界阈值的响应

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-22 DOI: 10.1016/j.agwat.2026.110180

Heran Yahefujiang , Jie Zou , Wulala Tangjialeke , Jianli Ding , Yue Cao , Yue Xu , Shiqi An

In the context of global climate change, the severity and frequency of drought events are on the rise. Compound droughts, marked by both soil aridity and atmospheric dry conditions, exert significant effects on how terrestrial ecosystems operate. As a crucial ecological trait, ecosystem Water Use Efficiency (WUE) denotes the interrelationship between the carbon cycle and the water cycle. Therefore, understanding the respective impacts of soil drought and atmospheric drought on WUE, as well as their critical thresholds, is essential for predicting drought risks. The present study employs multi-source remote sensing datasets covering 2001–2023, integrates binning-based decoupling approaches and threshold detection techniques, and quantitatively assesses the independent impacts of soil and atmospheric drought on WUE across Central Asia, while identifying the threshold responses of WUE to these drought stressors. Major outcomes are summarized as follows: (1) In the majority of Central Asian territories, Vapor Pressure Deficit (VPD) represents the dominant factor regulating WUE, covering approximately 88.06 % of the regional extent. Across different drought intensities, vegetation types, latitudes, and elevation gradients, VPD consistently emerges as the key driver of WUE; (2) Approximately 15 % of the region exhibits a critical threshold response of WUE to atmospheric drought, with notable spatial heterogeneity. On average, the critical transition of WUE corresponds to the 80th percentile of VPD. This research offers a theoretical basis to support drought evaluation and ecological rehabilitation initiatives across Central Asia.

在全球气候变化的背景下，干旱事件的严重程度和频率都在上升。以土壤干旱和大气干旱为特征的复合干旱对陆地生态系统的运作方式产生重大影响。生态系统水分利用效率（WUE）是一项重要的生态性状，反映了碳循环与水循环之间的相互关系。因此，了解土壤干旱和大气干旱对水分利用效率的影响及其临界阈值，对预测干旱风险至关重要。本研究采用2001-2023年多源遥感数据集，结合基于分类的解耦方法和阈值检测技术，定量评估中亚地区土壤和大气干旱对水分利用效率的独立影响，并确定水分利用效率对这些干旱胁迫的阈值响应。主要结果如下：(1)在中亚大部分地区，水汽压亏缺（VPD）是水分利用效率的主导因子，约占区域面积的88.06% %。在不同干旱强度、植被类型、纬度和海拔梯度下，VPD始终是WUE的关键驱动因素；(2)约15% %的区域水分利用效率对大气干旱具有临界阈值响应，且空间异质性显著。平均而言，WUE的临界转变对应于VPD的第80个百分位数。该研究为中亚地区干旱评价和生态恢复提供了理论依据。

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引用次数: 0

Optimizing maize canopy structure to enhance resource use efficiency in maize-soybean intercropping systems 优化玉米冠层结构提高玉米-大豆间作系统资源利用效率

IF 6.5 1区农林科学 Q1 AGRONOMY

Agricultural Water Management

Pub Date : 2026-03-31 Epub Date: 2026-01-16 DOI: 10.1016/j.agwat.2026.110161

Shiming Duan , Bin Du , Wencong Chen , Shichao Chen , Qi Liao , Manoj Shukla , Taisheng Du

In water-limited regions, optimizing irrigation is fundamental to the sustainability of maize-soybean intercropping. However, the synergistic mechanisms through which irrigation modulates canopy structure to alleviate interspecific light competition and enhance water productivity remain poorly understood. This study investigated the ecophysiological responses of the intercropping system to the interplay between maize canopy architectures and deficit irrigation strategies. A two-year field experiment was conducted in northwest China, a representative arid region. The sole cropping treatments included compact maize (M1), spreading maize (M2), and shade-tolerant soybean (S), while the intercropping treatments comprised M1S and M2S. Based on the traditional irrigation (full irrigation for both maize and soybean), single-crop deficit irrigation and dual-crop deficit irrigation strategies were implemented. Results showed that the compact maize architecture inherently improved light transmittance (Tau, +30.3 %), boosting photosynthetically active radiation (PAR, +20.8 %) and net photosynthetic rate (Pn, +13.9 %) for intercropped soybean. More significantly, the "maize-full, soybean-deficit" irrigation strategy synergistically modulated maize morphology, further increasing its canopy Tau by 19.0 %. This architectural modification amplified PAR for soybean by 40.9 % and its Pn by 46.4 %, effectively mitigating light competition and balancing interspecific aggressivity (Ams ≈ 0). Critically, this integrated strategy achieved substantial water savings (9.4–16.6 % less irrigation) without compromising system yield, while significantly increasing irrigation water productivity (IWP, +10.2 %) and water equivalent ratio (WER, +13.7 %). Our findings demonstrate that synergistic regulation of canopy architecture via precision irrigation is a potent strategy for achieving water-saving and high-yield goals in intercropping systems, offering a valuable paradigm for sustainable agriculture in arid zones globally.

在缺水地区，优化灌溉对玉米-大豆间作的可持续性至关重要。然而，灌溉调节冠层结构以缓解种间光竞争和提高水分生产力的协同机制仍不清楚。研究了间作制度对玉米冠层结构与亏缺灌溉策略相互作用的生理生态响应。在具有代表性的西北干旱区进行了为期两年的田间试验。单作处理包括密实玉米（M1）、铺布玉米（M2）和耐荫大豆(S)，间作处理包括M1S和M2S。在传统灌溉方式（玉米和大豆全灌）的基础上，实施单亏灌和双亏灌策略。结果表明，紧凑的玉米结构内在地提高了间作大豆的透光率（Tau, +30.3 %），提高了光合有效辐射（PAR, +20.8 %）和净光合速率（Pn, +13.9 %）。更显著的是，“满玉米亏大豆”灌溉策略协同调节了玉米形态，进一步增加了19.0 %的冠层Tau。这种结构修饰使大豆的PAR和Pn分别提高了40.9 %和46.4 %，有效地缓解了光竞争，平衡了种间攻击性（Ams≈0）。关键是，这种综合策略在不影响系统产量的情况下实现了大量节水（灌溉减少9.4-16.6 %），同时显著提高了灌溉水生产率（IWP, +10.2 %）和水当量比（WER, +13.7 %）。我们的研究结果表明，通过精确灌溉对冠层结构进行协同调节是实现间作系统节水高产目标的有效策略，为全球干旱地区的可持续农业提供了有价值的范例。

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引用次数: 0