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Developing effective deep-rooted winter wheat cultivars improves adaptation to stored-soil-water irrigation in the North China Plain 培育有效的深根冬小麦品种提高了华北平原对储水灌溉的适应性
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-20 DOI: 10.1016/j.agwat.2026.110165
Baoru Li , Jie Han , Huijie Gu , Zongzheng Yan , Lei Wang , Bianyin Wang , Xiuwei Liu
Root systems are crucial for soil water uptake in water-limited environments. However, it remains unclear whether winter wheat (Triticum aestivum L.) cultivar renewal in the North China Plain (NCP) has led to adapted root traits in response to changing irrigation practices, particularly stored-soil-water irrigation (W1). A two-year field experiment was conducted using nine historical winter wheat cultivars (released from 1978 to 2021) under two irrigation regimes: conventional full irrigation (W3) and W1. Root traits, grain yield, water use efficiency (WUE), and evapotranspiration (ET) were analyzed, and the APSIM model was used to simulate the potential for root improvement to enhance grain yield under these regimes. Cultivar renewal significantly increased grain yield by 23 kg·ha−1·yr−1 and WUE by 8.2–8.4 g·m−3·yr−1 under W1 conditions but did not lead to a concurrent improvement in ET and root traits. In contrast, W1 significantly increased root mass density by 24.5–27.3 % and root length density by 9.7–25.6 % in the 50–150 cm soil layer compared to W3. APSIM simulations demonstrated that optimizing root traits for greater deep-water extraction could substantially boost yield under W1, with a projected increase of 37.5 kg·ha−1 per additional millimeter of water absorbed. We conclude that modern cultivars have improved WUE, but breeding has not strategically enhanced deep root systems to match the needs of water-saving irrigation. Targeted breeding for winter wheat cultivars with more efficient deep roots is crucial to fully leverage the benefits of W1.
在缺水环境中,根系对土壤吸收水分至关重要。然而,目前尚不清楚华北平原冬小麦(Triticum aestivum L.)品种更新是否导致根系性状适应灌溉方式的变化,特别是储水灌溉(W1)。采用9个历史冬小麦品种(1978 - 2021年发布),在常规全灌(W3)和W1两种灌溉制度下进行了为期两年的田间试验。通过分析根系性状、籽粒产量、水分利用效率(WUE)和蒸散量(ET),利用APSIM模型模拟不同处理方式下根系改良提高籽粒产量的潜力。W1条件下,品种更新使籽粒产量显著提高23 kg·ha−1·yr−1,水分利用效率显著提高8.2 ~ 8.4 g·m−3·yr−1,但未导致ET和根系性状同时改善。在50 ~ 150 cm土层中,W1比W3显著提高了根质量密度24.5 ~ 27.3 %,根长密度9.7 ~ 25.6 %。APSIM模拟表明,在W1条件下,优化根系性状以实现更大的深水提取可以显著提高产量,预计每增加一毫米吸水量可增加37.5 kg·ha - 1。我们得出结论,现代栽培品种提高了水分利用效率,但育种并没有战略性地增强深层根系以适应节水灌溉的需要。有针对性地选育具有更高效深根的冬小麦品种对于充分利用W1的优势至关重要。
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引用次数: 0
Water quality dynamics of irrigation reservoirs in series at a production plant nursery 某生产型苗圃灌溉水库串联水质动态
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-17 DOI: 10.1016/j.agwat.2026.110167
Natasha L. Bell , Lauren M. Garcia Chance , William H.J. Strosnider , Daniel R. Hitchcock , John C. Majsztrik , Sarah A. White
The dynamics of sediment, phosphorus, and nitrogen were characterized in a treatment train consisting of a vegetated channel followed by two irrigation reservoirs (RR1 and RR2) at a retail/production plant nursery in South Carolina’s Piedmont Ecoregion. Water quality and hydrologic data (flow rates, rainfall, irrigation events) were collected to evaluate seasonal variation in treatment capacity. Nominal hydraulic retention times (HRTs) were generally longer in winter and shorter during active production months, reducing treatment capacity when irrigation flows and nutrient loads were highest. Irrigation dominated hydrology in summer and fall, while rainfall was the primary driver in winter and spring. Concentrations of total suspended solids (TSS), phosphate (PO₄-P), and dissolved inorganic nitrogen (DIN) declined sequentially from the vegetated channel through RR1 to RR2. Average removal rates in RR1 and RR2 were 189 ± 106 and 32.9 ± 18.7 g m⁻² d⁻¹ for TSS, 580 ± 310 and 58.7 ± 30.9 mg m⁻² d⁻¹ for DIN, and 51.3 ± 24.4 and 9.19 ± 6.17 mg m⁻² d⁻¹ for PO₄-P, respectively. Removal was highest in spring and summer and lowest in winter, when internal loading and reduced microbial activity likely limited performance. Despite its larger size, RR2 showed more variable treatment, suggesting that treatment efficiency is influenced more by hydraulic design and influent loading than basin size alone. These findings support the dual role of irrigation reservoirs in water quality improvement and water security, emphasizing the need for design strategies that optimize both treatment and storage functions.
在南卡罗来纳皮埃蒙特生态区的零售/生产植物苗圃中,通过由植被通道和两个灌溉水库(RR1和RR2)组成的处理序列,表征了沉积物、磷和氮的动态。收集水质和水文数据(流量、降雨量、灌溉事件)来评估处理能力的季节性变化。名义水力滞留时间(hrt)通常在冬季较长,而在生产活跃月份较短,这降低了灌溉流量和养分负荷最高时的处理能力。夏季和秋季以灌溉为主,冬季和春季以降雨为主。总悬浮固体(TSS)、磷酸盐(po_4 -P)和溶解无机氮(DIN)的浓度从植被通道通过RR1到RR2依次下降。平均去除率在189年RR1和RR2 ±  106和32.9±18.7  g m⁻²d⁻¹ TSS、580 ±  310和58.7±30.9  mg m⁻²d⁻¹ 喧嚣,和51.3 ±  24.4和9.19±6.17  mg m⁻²d⁻¹ PO₄- p,分别。去除率在春季和夏季最高,冬季最低,此时内部负荷和微生物活性降低可能限制了性能。尽管RR2的尺寸更大,但其处理的变量更多,这表明处理效率更多地受到水力设计和进水负荷的影响,而不仅仅是流域尺寸。这些发现支持了灌溉水库在改善水质和水安全方面的双重作用,强调了优化处理和储存功能的设计策略的必要性。
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引用次数: 0
Closing the yield gap of spring maize by synergizing drip nitrogen-fertigation with plant density in the arid region of Northwest China 西北干旱区滴灌施氮与密度协同缩小春玉米产量缺口
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-26 DOI: 10.1016/j.agwat.2026.110175
Mengxuan Shao , Haijun Liu , Wenwen Ju
Drip fertigation technology combined with optimal plant density (PD) and nitrogen application rate (Nrate) management is a critical strategy for closing the yield gap in arid regions of Northwest China. A three-year field experiment (2021–2023) was conducted in Hetao Irrigation District (HID) to determine the effects of PD and Nrate on crop growth, grain yield (GY), water productivity (WP), radiation use efficiency (RUE), and nitrogen use efficiency (NUE) of drip-fertigated spring maize (Zea mays L.). Four plant densities (D1: 60,000 plants hm−2, D2: 75,000 plants hm−2, D3: 90,000 plants hm−2, D4: 105,000 plants hm−2) and three N application rates (N1: 200 kg hm−2, N2: 250 kg hm−2, N3: 300 kg hm−2) were considered. Separate annual analyses indicated PD as the main factor governing population establishment and resource utilization, with a greater effect size than Nrate and their interaction. Increasing density from D1 to D3 significantly enhanced plant height (HVT), leaf area index (LAIVT), population-level aboveground dry matter (DMP), and nitrogen uptake (NutP) by 6.30 %, 52.8 %, 21.0 %, and 11.2 %, respectively, ultimately rising GY by 28.9 %. The D3N3 achieved the highest DMP and NutP, exceeding other combinations by 17.0 % and 16.4 %, while D3N2 resulted in optimal GY, WP, and RUE, exceeding other combinations by 14.5 %, 16.5 %, and 10.2 %. However, a further increase to D4 induced negative effects, reducing DMP, NutP, GY, WP, and RUE by 6.80 %, 14.0 %, 4.33 %, 8.98 %, and 5.19 %, respectively, although NUE improved by 11.2 %. Linear mixed models also confirmed the dominant role of density. Although the PD×Nrate interaction was not statistically significant, the Nrate effect varied with PD environment. Specifically, N3 suppressed plant growth at D1, limiting HVT, LAIVT, and DMP. Moderate N2 resulted in optimal GY, WP, and RUE at densities from D1 to D3, whereas at D4, increasing Nrate exhibited a consistently positive effect. On the basis of bivariate regression analysis, the optimal combination was 93,000 plants hm−2 with 264 kg N hm−2, which could achieve a GY and a WP of 20.5 t hm−2 and 4.31 kg m−3, respectively, and reduce the yield gap from 72.0 % to 18.0 %. Overall, these findings show that prioritizing planting density and implementing density-specific nitrogen management are the pivotal strategies for closing the yield gap and achieving high resource use efficiency in drip-fertigated spring maize of Northwest China.
滴灌施肥技术与最佳种植密度(PD)和氮肥施用量(Nrate)管理相结合是缩小西北干旱区产量差距的重要策略。为了研究PD和Nrate对滴灌春玉米(Zea mays L.)作物生长、产量、水分生产力、辐射利用效率(RUE)和氮素利用效率(NUE)的影响,在河套灌区(HID)进行了为期3年的田间试验(2021-2023)。考虑了4种植物密度(D1: 60000株hm−2,D2: 75000株hm−2,D3: 90000株hm−2,D4: 105000株hm−2)和3种施氮量(N1: 200 kg hm−2,N2: 250 kg hm−2,N3: 300 kg hm−2)。单独的年度分析表明,PD是控制种群建立和资源利用的主要因素,其效应量大于Nrate及其相互作用。从D1到D3增加密度可显著提高株高(HVT)、叶面积指数(LAIVT)、种群水平地上干物质(DMP)和氮素吸收率(NutP),分别提高6.30 %、52.8 %、21.0 %和11.2 %,最终使GY提高28.9 %。D3N3的DMP和NutP最高,分别比其他组合高17.0 %和16.4 %,而D3N2的GY、WP和RUE最佳,分别比其他组合高14.5 %、16.5 %和10.2 %。然而,进一步增加D4诱导了负面影响,DMP、NutP、GY、WP和RUE分别降低了6.80 %、14.0 %、4.33 %、8.98 %和5.19 %,尽管NUE提高了11.2 %。线性混合模型也证实了密度的主导作用。虽然PD×Nrate相互作用无统计学意义,但Nrate效应随PD环境而变化。具体来说,N3在D1时抑制植物生长,限制HVT、LAIVT和DMP。在D1至D3密度范围内,适度的N2导致最佳的GY、WP和RUE,而在D4密度范围内,增加Nrate呈现出一致的正效应。双变量回归分析结果表明,最优组合为93000株hm - 2, 264 kg N hm - 2,可实现GY和WP分别为20.5 t hm - 2和4.31 kg m - 3,可将产量差距从72.0 %缩小到18.0 %。综上所述,优化种植密度和实施按密度施氮管理是缩小西北滴灌春玉米产量差距、实现资源高效利用的关键策略。
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引用次数: 0
Modeling crop suitability for rewetting landscapes in the Netherlands across present and future climate scenarios 模拟荷兰当前和未来气候情景下作物对再湿润景观的适应性
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-27 DOI: 10.1016/j.agwat.2026.110190
Ruben T. Brouwer , Kim C.I. van Etten , Perry G.B. de Louw , Jakob Wallinga , Julian Helfenstein
Draining peatlands and other wetlands for agricultural use triggers several environmental problems, including greenhouse gas emissions, land subsidence, and biodiversity loss. Paludiculture, farming on rewetted land, is a strategy that can help restore some of the natural functions of wetlands while maintaining agricultural use. However, little is known about where paludiculture is feasible or with which crops. In this study, we address this knowledge gap by assessing the biophysical suitability of 12 potential paludicultural crops for the Netherlands. Selected crops include both native wetland crops as well as East Asian paddy crops. We first identified areas with potential for paludiculture based on groundwater levels, seepage and available water capacity. Around a quarter of the Netherlands has the hydrological potential for paludiculture. We then successfully expanded the crop suitability model EcoCrop (Hijmans et al., 2001) with a water balance function. Our study shows that current (drained) conditions limit suitability for many paludicultural crops. However, under raised water conditions most investigated crops—including cattail (Typha latifolia and angustifolia), reed (Phragmites australis), reed canary grass (Phalaris arundinacea), barnyard grass (Echinochloa crus-galli), rice (Oryza sativa), water cress (Nasturtium officinale), European blueberry (Vaccinium myrtillus), water spinach (Ipomoea aquatica), and cranberry (Vaccinium macrocarpon)--were predicted to have at least moderate suitability in some parts of the Netherlands. The impact of climate change on the suitability of the selected crops was minimal, with 8 out of 12 crops experiencing no relevant change in mean suitability; however some East Asian crops will benefit from temperature increase. Our findings complement existing field trials with paludicultural crops by providing the first spatial paludicultural suitability analysis on a national scale. These results support evidence-based discussions on the potential of paludiculture in temperate lowland areas, not only in the Netherlands but also surrounding regions.
排干泥炭地和其他湿地用于农业会引发一些环境问题,包括温室气体排放、地面沉降和生物多样性丧失。在复湿土地上耕作的古农业是一种策略,可以帮助恢复湿地的一些自然功能,同时保持农业用途。然而,很少有人知道在哪里可以进行农耕,或者用什么作物种植。在这项研究中,我们通过评估12种潜在的荷兰农业作物的生物物理适宜性来解决这一知识差距。所选作物既包括本地湿地作物,也包括东亚水稻作物。我们首先根据地下水位、渗水情况和可用水量确定了具有古农业潜力的地区。荷兰大约有四分之一的土地具有种植古农业的水文潜力。然后,我们成功地扩展了作物适宜性模型EcoCrop (Hijmans等人,2001)的水分平衡功能。我们的研究表明,目前的(排水)条件限制了许多古农业作物的适宜性。然而,在升高的水分条件下,大多数被调查的作物——包括香蒲(Typha latifolia和angustifolia)、芦苇(Phragmites australis)、芦苇金丝雀草(Phalaris arundinacea)、稗草(Echinochloa crusgalli)、水稻(Oryza sativa)、水芥(Nasturtium officinale)、欧洲蓝莓(Vaccinium myrtillus)、水菠菜(Ipomoea aquatica)和蔓越莓(Vaccinium macrocarpon)——预计在荷兰的某些地区至少具有中等的适宜性。气候变化对所选作物适宜性的影响很小,12种作物中有8种的平均适宜性没有相关变化;然而,一些东亚作物将受益于气温升高。我们的发现通过在全国范围内提供第一个空间古农业适宜性分析,补充了现有的古农业作物田间试验。这些结果支持以证据为基础的讨论温带低地地区古农业的潜力,不仅在荷兰,而且在周边地区。
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引用次数: 0
Optimizing subsoiling depth to enhance soil water storage and annual crop water productivity in wheat-maize cropping system 优化埋土深度以提高小麦-玉米种植系统土壤储水量和作物年水分生产力
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-31 DOI: 10.1016/j.agwat.2026.110199
Yi Lv , Shaobo Wang , Xiaowen Xu , Yecheng Zhang , Jingyi Shao , Xinkun Liu , Ruxin Li , Qisong Gao , Fiston Bizimana , Huifang Han , Ling Liu , Rui Zong
Subsoiling effectively enhances crop water productivity (CWP) by optimizing soil structure. Nevertheless, the effects of different subsoiling depths on cross-seasonal soil water utilization and CWP remain unclear. This study aimed to evaluate effects of four tillage methods (conventional tillage at 25 cm depth (CT25); subsoiling at 30 cm (ST30); 35 cm (ST35); and 40 cm depths (ST40)) on soil structure, hydraulic properties, and CWP during 2016–2018 winter wheat-summer maize cropping system. Results revealed that all subsoiling depths improved soil structure and hydraulic properties compared to conventional tillage. ST35 and ST40 increased total porosity by 4.83–7.78 % while reducing bulk density by 3.11–8.17 % compared to CT25. Soil water infiltration rates were significantly higher under subsoiling than CT25. At maize maturity, ST30, ST35 and ST40 maintained significantly higher soil water storage (SWS) in the 0–40 cm layer compared to CT25, with increases of 16.78 %, 0.65 %, and 7.97 %, respectively. The Partial Least Squares Path modeling revealed that SWS at maize harvest significantly enhanced subsequent wheat-sowing SWS (p < 0.01), demonstrating cross-seasonal water carryover. Consequently, subsoiling increased CWP by 10.9–15.9 % and 9.8–11.9 % during the maize and wheat seasons, respectively, compared to CT25. ST35 optimized 0–40 cm soil structure while enhancing maize-season SWS. The stored water alleviated subsequent wheat-season water deficits, thereby increasing annual CWP in the wheat-maize system. ST35 is recommended as an optimal tillage practice for sustainable plough layer construction in eastern Shandong Province, China. The findings provide new insights for water-efficient tillage systems to enhance annual crop productivity in the North China Plain.
深埋土壤通过优化土壤结构,有效提高作物水分生产力。然而,不同埋深对跨季节土壤水分利用和CWP的影响尚不清楚。本研究旨在评价四种耕作方法的效果:常规耕作深度为25 cm (CT25);30 cm深埋(ST30); 35厘米(ST35);和40 cm深度(ST40))对2016-2018年冬小麦-夏玉米种植系统土壤结构、水力特性和CWP的影响。结果表明,与常规耕作相比,所有深埋深度都改善了土壤结构和水力特性。与CT25相比,ST35和ST40的总孔隙度提高了4.83-7.78 %,容重降低了3.11-8.17 %。深埋处理土壤水分入渗速率显著高于CT25处理。玉米成熟期,与CT25相比,ST30、ST35和ST40在0-40 cm层保持了较高的土壤水储量,分别增加了16.78 %、0.65 %和7.97 %。偏最小二乘路径模型显示,玉米收获时的SWS显著提高了随后小麦播种时的SWS (p <; 0.01),显示了跨季节的水分携带。因此,与CT25相比,深土处理在玉米季和小麦季的CWP分别提高了10.9-15.9 %和9.8-11.9 %。ST35优化了0 ~ 40 cm土壤结构,提高了玉米季SWS。储存的水分缓解了随后小麦季节的水分短缺,从而增加了小麦-玉米系统的年CWP。ST35是山东省东部可持续耕层建设的最佳耕作方式。这一发现为提高华北平原作物年生产力的节水耕作制度提供了新的见解。
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引用次数: 0
AI-driven decision support system enhances productivity, water use efficiency, and soil sustainability of strategic crops in sandy soils 人工智能驱动的决策支持系统提高了沙质土壤战略作物的生产力、水分利用效率和土壤可持续性
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-02-01 DOI: 10.1016/j.agwat.2026.110198
Eman I.R. EMARA , Abdullateef M. Al-SAEED , Lamy M.M. HAMED
Sandy soils in Egypt's newly reclaimed lands face multiple challenges due to their low water-holding capacity, nutrient leaching, and high evapotranspiration, all of which threaten sustainable crop production. This study evaluated an artificial intelligence-driven decision support system (AI-DSS) for managing irrigation and fertilization in wheat (Triticum aestivum L.), maize (Zea mays L.), and sugar beet (Beta vulgaris L.) over three consecutive seasons (2022–2025). The AI-DSS integrated real-time soil moisture, nutrient, and weather data using Random Forest and LSTM models to optimize input scheduling. Compared to conventional farmer practices (CFP), AI-DSS led to yield increases of up to 13.1 % and improvements in water use efficiency (WUE) by up to 15.5 %, particularly in sugar beet during 2024. Partial factor productivity (PFP) also increased significantly, especially in maize. Post-harvest soil analysis indicated higher residual levels of nitrogen (+13.6–19.3 %), phosphorus (+22.7–25.0 %), and organic matter (+17.9–22.0 %), along with a 13–19 % reduction in soil salinity. Economic assessments showed an 8.5–15.0 % increase in the benefit–cost ratio (BCR). Additionally, nitrate leaching was substantially reduced under AI-DSS, mitigating environmental risks. These results underscore the potential of AI-driven management to enhance productivity, input-use efficiency, and soil sustainability in coarse-textured soils of arid regions.
埃及新开垦土地上的沙质土壤由于其低持水量、养分淋失和高蒸散而面临多重挑战,所有这些都威胁到作物的可持续生产。本研究评估了人工智能驱动的决策支持系统(AI-DSS)在小麦(Triticum aestivum L.)、玉米(Zea mays L.)和甜菜(Beta vulgaris L.)连续三个季节(2022-2025)灌溉和施肥管理中的应用。AI-DSS利用随机森林和LSTM模型集成了实时土壤湿度、养分和天气数据,以优化输入调度。与传统农民实践(CFP)相比,AI-DSS使产量增加13. %,水利用效率(WUE)提高15.5% %,特别是在2024年期间的甜菜。部分要素生产率(PFP)也显著提高,尤其是玉米。收获后土壤分析表明,土壤中氮(+ 13.6-19.3 %)、磷(+ 22.7-25.0 %)和有机质(+ 17.9-22.0 %)残留水平较高,土壤盐分降低13-19 %。经济评价表明,效益成本比(BCR)提高了8.5-15.0 %。此外,在AI-DSS下,硝酸盐浸出大大减少,减轻了环境风险。这些结果强调了人工智能驱动的管理在提高干旱地区粗质土壤的生产力、投入利用效率和土壤可持续性方面的潜力。
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引用次数: 0
Degree of subsoil rock weathering alters soil water storage and tree water uses in irrigated apple orchards 地下岩石风化程度改变了灌溉苹果园土壤水分储存和树木水分利用
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-22 DOI: 10.1016/j.agwat.2026.110133
Chuantao Wang , Yinglei Wang , Shuqin Qiao , Tamir Kamai , Huijie Li , Hongchen Li , Bingcheng Si
Water stored in the weathered rock layers beneath shallow soils is essential for deep-rooted plants, particularly under limited precipitation and irrigation, and becomes even critical during drought. However, the influence of weathering degree on water supply capacity and tree transpiration remains poorly understood. We selected three apple orchards with different weathering degrees (WWP: weaker; SWP: stronger; FWP: fully weathered) and monitored soil moisture, tree transpiration, and root water uptake sources over three years using thermal diffusion probes, TDR, and stable isotopes. Results indicated that bulk density in the weathered layers exceeded 1.8 g cm−3 for WWP and SWP, significantly higher than FWP (1.4 g cm−3). WWP exhibited higher gravel content (over 30 %) and lower clay (below 10 %) compared to SWP and FWP, resulting in greater hydraulic conductivity but reduced water retention. Consequently, water storage in WWP profiles (0–2 m depth) was markedly lower than in SWP and FWP. Groundwater levels under WWP responded faster to water inputs, indicating rapid percolation. Tree transpiration rates followed the order SWP, FWP, WWP, highlighting differences in water availability across profiles. Stable isotope analyses revealed that trees in FWP orchards utilized water flexibly across layers. Notably, the average utilization rate of weathered rock water (80–200 cm) in SWP was only 16.62 %, while WWP showed a significantly higher utilization rate of 36.50 %. These findings suggest that orchards on weakly weathered rock with poor surface water-holding capacity should adopt reduced irrigation volumes with increased frequency to improve water use efficiency in shallow-soil hilly areas.
储存在浅层土壤下风化岩层中的水对深根植物是必不可少的,特别是在降水和灌溉有限的情况下,在干旱期间甚至变得至关重要。然而,风化程度对供水量和树木蒸腾的影响尚不清楚。我们选择了3个不同风化程度的苹果园(WWP:较弱,SWP:较强,FWP:完全风化),利用热扩散探针、TDR和稳定同位素对土壤水分、树木蒸腾和根系吸收源进行了3年的监测。结果表明:风化层中WWP和SWP的体积密度均大于1.8 g cm−3,显著高于FWP(1.4 g cm−3);与SWP和FWP相比,WWP表现出更高的砾石含量(超过30 %)和更低的粘土含量(低于10 %),从而提高了水力导电性,但降低了保水率。因此,WWP剖面(0-2 m深度)的储水量明显低于SWP和FWP。WWP下的地下水位对水输入的响应更快,表明快速渗透。树木蒸腾速率依次为SWP、FWP、WWP,突出了不同剖面水分有效性的差异。稳定同位素分析表明,FWP果园树木对水分的利用是灵活的。值得注意的是,SWP对80 ~ 200 cm的风化岩石水的平均利用率仅为16.62 %,而WWP的平均利用率为36.50 %。这些结果表明,在浅层土壤丘陵区,地表持水能力较差的弱风化岩石上的果园应减少灌溉量,增加灌溉频率,以提高水分利用效率。
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引用次数: 0
Towards sustainable water use in intensive and super-intensive olive orchards of Alentejo across multiple scenarios for present and future climate 在当前和未来气候的多种情况下,在阿连特茹集约化和超集约化橄榄果园实现可持续用水
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-24 DOI: 10.1016/j.agwat.2026.110176
Hanaa Darouich , Tiago B. Ramos , Luís Santos Pereira
Orchards present challenges for water management due to their anisotropic and heterogeneous canopy geometries. Over the past decade, the expansion of intensive and super-intensive olive orchards worldwide, and particularly in the Alentejo region, southern Portugal, has underscored the need for clear guidelines to accurately estimate crop water requirements for profitable yield, water saving, and environmental adequateness of these complex systems. To address these issues, multiple scenarios were developed based on the characteristics of a typical irrigation district in the region, incorporating relevant factors such as crop density, soil type, climate demand, and water saving irrigation (WSI) strategies. The Allen and Pereira (2009) approach was used for computing the actual basal crop coefficient (Kcb) based on observations of the fraction of ground cover by vegetation (fc), plant height (h), and degree of stomatal adjustment (Fr). The SIMDualKc water balance model was then used to compute all terms of the daily soil water balance, i.e., actual crop evapotranspiration, percolation, and runoff. The results demonstrate how Kcb values respond to these various factors and highlight the significant water savings achievable through WSI strategies. Climate change projections for the region, where temperatures and rainfall were generated using eight different global circulation models, predict future increasing imbalances between water availability and demand. Considering present and future scenarios, these findings contribute to the development of effective coping strategies that contribute to the sustainability of intensive and super-intensive olive production systems.
果园的树冠几何形状各向异性和异质性给水管理带来了挑战。在过去的十年里,世界范围内,特别是在葡萄牙南部的阿连特茹地区,集约化和超集约化橄榄园的扩张,强调了明确的指导方针的必要性,以准确估计作物的需水量,以实现这些复杂系统的盈利产量、节水和环境适宜性。为了解决这些问题,根据该地区典型灌区的特征,结合作物密度、土壤类型、气候需求和节水灌溉(WSI)策略等相关因素,开发了多种情景。采用Allen和Pereira(2009)的方法,根据植被覆盖比例(fc)、植物高度(h)和气孔调节度(Fr)的观测值计算实际基础作物系数(Kcb)。然后使用SIMDualKc水分平衡模型计算土壤日水分平衡的所有项,即实际作物蒸散、渗滤和径流。结果显示了Kcb值如何响应这些不同的因素,并突出了通过WSI策略可以实现的显著节水。该地区的气候变化预测使用了8种不同的全球环流模型生成了气温和降雨量,预测未来水资源供应和需求之间的不平衡将日益加剧。考虑到目前和未来的情况,这些发现有助于制定有效的应对策略,有助于集约化和超集约化橄榄生产系统的可持续性。
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引用次数: 0
Ultra-width film mulched with magnetized irrigation boosts soil rhizosphere processes and cotton yield in arid regions 超宽地膜磁化灌溉促进了干旱地区土壤根际过程和棉花产量
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-01-17 DOI: 10.1016/j.agwat.2026.110152
Tong Heng , Yingjie Ma , Mingjiang Deng , Pengrui Ai , Zhenghu Ma , Jiawen Yu
Water scarcity constrains cotton production in arid regions, while film mulching and magnetized irrigation have demonstrated agronomic potential individually, their combined effects on rhizosphere dynamics and soil aeration remain unclear. A two-year field study (2023–2024) employed a two-factor completely randomized design with three replicate units (106 × 200 m) per treatment. The impacts of magnetized irrigation (0.3 T) and three film mulched widths (1.4, 2.05, and 4.4 m) were evaluated. Outcomes assessed included soil oxygen (O₂) and moisture dynamics, rhizosphere microbial, and irrigation water use efficiency (IWUE). Ultra-width mulched with magnetized irrigation (W3A) synergistically optimized soil O₂ (15.7–20.0 %) and enhanced moisture retention by 20.4 % compared to narrower mulches. This combination boosted microbial diversity and metabolic activity, increasing actinobacteria abundance (17.1–25.5 %) and elevating predicted carbohydrate metabolism pathway abundance based on 16S rRNA profiling (1961 ± 175 reads) by 1.5-fold versus non-magnetized treatments. W3A maximized root dry weight (35.9 g plant⁻¹) and seed cotton yield (7950 ± 364 kg hm⁻² in 2024), significantly outperforming non-magnetized (6600 ± 460 kg hm⁻²) while achieving IWUE of 1.74 ± 0.3 kg m⁻³. This study provides novel evidence that integrating magnetized irrigation with wide mulching enhances yield by creating a favorable soil water-oxygen environment, optimizing rhizosphere processes, and predicting microbial function, thereby offering a sustainable technological framework for arid agriculture.
水资源短缺制约了干旱地区的棉花生产,虽然膜覆盖和磁化灌溉单独显示了农艺潜力,但它们对根际动态和土壤通气性的综合影响尚不清楚。为期两年的实地研究(2023-2024年)采用双因素完全随机设计,每个处理有三个重复单位(106 × 200 m)。评价了磁化灌溉(0.3 T)和三种覆盖宽度(1.4、2.05和4.4 m)对土壤生长的影响。评估结果包括土壤氧(O₂)和水分动态、根际微生物和灌溉水利用效率(IWUE)。与较窄覆盖相比,超宽覆盖磁化灌溉(W3A)协同优化了土壤O₂(15.7-20.0 %),提高了水分保持率20.4 %。这种组合提高了微生物多样性和代谢活性,放线菌丰度(17.1-25.5 %)和基于16S rRNA分析(1961 ± 175 reads)的预测碳水化合物代谢途径丰度比非磁化处理提高了1.5倍。W3A最大化根干重(35.9 g 植物⁻¹)和籽棉产量(7950 ± 364 公斤hm⁻²在2024年),显著优于non-magnetized(6600 ± 460 公斤hm⁻²)而实现 IWUE 1.74±0.3  公斤 m⁻³。本研究提供了新的证据,证明将磁化灌溉与宽覆盖相结合可以通过创造良好的土壤水氧环境、优化根际过程和预测微生物功能来提高产量,从而为干旱农业提供可持续的技术框架。
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引用次数: 0
Synergistic management of the water-food-energy-carbon nexus in resource-constrained megaregions: A dynamic general equilibrium assessment for Beijing–Tianjin–Hebei 资源受限特大区域水-粮-能-碳联系的协同管理:京津冀动态一般均衡评价
IF 6.5 1区 农林科学 Q1 AGRONOMY Pub Date : 2026-03-31 Epub Date: 2026-02-10 DOI: 10.1016/j.agwat.2026.110205
Shihao Shan , Xichen Lin , Hongzhen Ni , Chaomeng Ma , Jie Wang
The intrinsic interlinkages among water, food, energy, and carbon emissions have become a critical factor of regional sustainable development. Under the low-carbon transition, the demand for coordinated policy supply to ensure water, food, and energy security has increased substantially. However, existing general equilibrium analyses of Water–Food–Energy–Carbon (WFEC) nexus policies often lack sufficient policy specificity and systemic coverage, as they tend to overlook dynamic linkages and cross-sectoral transmission processes.To address this gap, this study extends a multi-regional dynamic Computable General Equilibrium (CGE) model by explicitly representing substitution effects among multiple types of water and energy inputs, disaggregating grain production from the agricultural sector, and incorporating a carbon emissions linkage module. Oriented toward prospective policy demands in the Beijing–Tianjin–Hebei (BTH) region, the model is used to design and evaluate water-saving, food production enhancement, energy conservation and carbon reduction, as well as integrated policy scenarios, and to assess their WFEC nexus interaction effects across the three regions.The results indicate that: (1) Single-resource policies targeted at specific objectives involve substantial trade-offs, whereas the integrated scenario (S4) achieves the most synergistic effects across water saving, food production, and energy–carbon mitigation. By 2035, S4 reduces total regional water use by 3.06 %, energy consumption by 0.55 %, and carbon emissions by 2.57 %, while increasing grain produciotn by 0.41 %, at a marginal GDP loss of only 0.02 %.(2)Hebei exhibits the strongest WFEC nexus coupling,with a Policy Comprehensive Impact(PCI) gap between the integrated scenario and single-policy scenarios averages 0.366, compared with 0.447 in Beijing and 0.373 in Tianjin, and further narrows to 0.273 by 2035.(3)Effective WFEC nexus governance in the BTH megaregions requires synergistic, region-differentiated coordination framework, in which Hebei serves as the primary adjustment area for integrated regulation, while Beijing and Tianjin play complementary and stabilizing roles within the coordinated policy portfolio.
水、粮食、能源和碳排放之间的内在联系已成为区域可持续发展的关键因素。在低碳转型下,确保水、粮食和能源安全的协调政策供给需求大幅增加。然而,现有的水-食物-能源-碳关系政策的一般平衡分析往往缺乏足够的政策特异性和系统覆盖,因为它们往往忽视动态联系和跨部门传递过程。为了解决这一差距,本研究扩展了一个多区域动态可计算一般均衡(CGE)模型,通过明确表示多种类型的水和能源投入之间的替代效应,从农业部门分解粮食生产,并纳入碳排放联动模块。以京津冀地区未来政策需求为导向,利用该模型设计和评价了节水、增产、节能和减碳以及综合政策情景,并评估了它们在京津冀地区的WFEC关联互动效应。结果表明:(1)针对特定目标的单一资源政策涉及大量权衡,而综合情景(S4)在节水、粮食生产和能源-碳减排方面实现了最大的协同效应。到2035年,S4将使区域用水量减少3.06 %,能耗减少0.55 %,碳排放量减少2.57 %,粮食产量增加0.41 %,而GDP边际损失仅为0.02 %。(2)河北省WFEC联结耦合最强,综合情景与单一情景的政策综合影响(PCI)差距平均为0.366,北京为0.447,天津为0.373,到2035年将进一步缩小至0.273。(3)京津冀大区域WFEC联动有效治理需要协同性、区域差别化的协调框架,其中河北作为综合调控的主要调整区,京津冀在协调的政策组合中发挥互补稳定作用。
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引用次数: 0
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Agricultural Water Management
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