首页期刊导航|Agricultural Water Management
期刊信息/Journal information
Agricultural Water Management
Elsevier
Agricultural Water Management

Elsevier

0378-3774

Agricultural Water Management/Journal Agricultural Water ManagementSCIISTPEI
正式出版
收录年代

    Water uptake dynamics in apple trees assessed by an isotope labeling approach

    Aguzzoni A.Engel M.Zanotelli D.Comiti F....
    13页
    查看更多>>摘要：? 2022 The AuthorsImproving our knowledge on the relative contribution of irrigation water, precipitation, and groundwater to tree transpiration is necessary for an efficient and sustainable use of water resources in agriculture. For this purpose, we applied deuterium (2H) enriched water to trace the uptake of irrigation water by apple trees under field and pot conditions. 2H-enriched water was supplied to apple trees in an Alpine valley mimicking sprinkler irrigation. Labeled water infiltration in the soil and presence in apple tree shoots was measured over a week. An ancillary experiment using potted trees was performed to elucidate the role of irrigation water after soil saturation with 2H-enriched water. Under field conditions, 2H-enriched water infiltrated to a maximum depth of 0.6 m, where most of the fine roots were present, and mixed with pre-irrigation soil water. Sprinkler irrigation water was taken up by apple trees 2–4 h after its supply and its contribution to the shoot water content increased in the first 24 h, then it leveled off. Tree water absorbed from the enriched soil layer represented on average 48 ± 3% and 26 ± 2% of the total water in shoot axes and leaves, respectively. The results of the pot experiment confirmed the contribution of irrigation water to shoot water and allowed us to speculate that under field conditions groundwater (ca. 0.9 m deep, with capillary rise expected up to 0.6 m depth) did not significantly contribute to tree water uptake. Results indicate that a large fraction of shoot water (52–74%) did not derive from recent soil water uptake, suggesting a rather limited water mixing within tree organs.
      原文链接:
    • NSTL
    • Elsevier

    The impact of irrigation return flow on seasonal groundwater recharge in northwestern Bangladesh

    Tulip S.S.Siddik M.S.Islam M.N.Rahman A....
    21页
    查看更多>>摘要：? 2022 Elsevier B.V.Irrigation is vital in Bangladesh in order to meet the growing food demand as a result of the increasing population. During the dry season, groundwater irrigation is the main source of water for agriculture. However, excessive abstraction of groundwater for irrigation causes groundwater level depletion. At the same time, the loss from excessive irrigation could end up contributing to aquifer recharge as return flow. Therefore, investigating the influence of irrigation on groundwater is important for the sustainable management of this resource. This study aims to assess the impact of irrigation on groundwater recharge in the northwest Rajshahi district in Bangladesh. A semi-physically based water balance model was used to simulate spatially distributed groundwater recharge with two scenarios (with and without irrigation). To evaluate the effect of irrigation, groundwater recharges from these two scenarios were compared. The result showed that the use of groundwater for irrigation increased over the study period whereas, there was a persistent trend of decrease in groundwater level during the study period. Groundwater provides 91% of overall irrigation in the study area. However, on average, about 33% of the total irrigation becomes return flow and contributes to groundwater recharge in the dry season. Irrigation return flow is around 98% of the total recharge during the dry season in this region. The spatially distributed seasonal return flow varies from 305 to 401 mm. In brief, irrigation has a significant role in groundwater recharge in the study area during the dry season. Hence, proper irrigation water measurement and management are necessary for sustainable groundwater resource management in this region.
      原文链接:
    • NSTL
    • Elsevier

    Response and contribution of shallow groundwater to soil water/salt budget and crop growth in layered soils

    Mao X.Shang S.Chen S.
    14页
    查看更多>>摘要：? 2022 Elsevier B.V.Shallow groundwater affects crop growth and yield by altering the root zone water and salt budgets, with the process being more complicated in layered soils. To gain insights into the role of shallow groundwater in layered soils, LAWSTAC, a physically-based agro-hydrological model, was employed to simulate soil water, salt, and groundwater fluxes and crop yield in three soil profiles: loam (L), loam with a sand interlayer (LSL), and loam with a clay interlayer (LCL). The model was verified using data collected in 2007 and 2008 from a spring wheat field with shallow groundwater tables. The model predictions matched well with the measured soil water content, salt concentration, groundwater table depth (GWD), leaf area index, biomass, and crop yield. Further simulations were conducted for the L, LSL, and LCL profiles with varying GWDs in the crop growth seasons and initial values specified at 130, 150, 170, 190, 210, 230, and 250 cm. The groundwater table showed greater fluctuations in LCL, with smaller fluctuations in LSL in comparison to L. When starting with smaller initial GWDs (of 130, 150, 170, and 190 cm), the coarse-textured soil under the root zone facilitated water and salt fluxes at the bottom of the root zone, resulting in larger averages for root zone water storage and more salt content during the crop growth seasons and lower crop yield due to salt stress. Meanwhile, in cases with an initial GWD larger than 210 cm, the coarse-textured soil inhibited the fluxes and improved crop yield due to the reduced salt stress. Fine-textured soil under the root zone inhibited water and salt fluxes, reducing root zone salt content and favoring crop yield; however, the effect decreased with larger initial GWDs. Thus, the groundwater table should be lowered to a level where coarse-textured soil acts as a capillary barrier for salt control and crop growth in soil profiles similar to LSL. Keeping a high groundwater table to sustain water for crop growth is acceptable in soil profiles similar to LCL, while keeping a lower groundwater table could be an effective practice to control salt and improve crop production in salinized croplands.
      原文链接:
    • NSTL
    • Elsevier

    Effects of water and nitrogen management on N2O emissions and NH3 volatilization from a vineyard in North China

    Guo Y.Ji Y.Zhang J.Liu Q....
    11页
    查看更多>>摘要：? 2022 Elsevier B.V.Agricultural soils are a major source of anthropogenic N2O emissions and NH3 volatilization because of the large input of nitrogen (N) via fertilizers. Chinese vineyards commonly receive excessive water and N applications, but the response of gaseous losses to these management practices are not well documented. In this study, a field experiment was conducted to measure N2O emissions and NH3 volatilization from a typical table grape (Vitis vinifera L.) vineyard in North China. Three water and N regulation management strategies were applied and compared with the local farmer's traditional water and N management (TWN, traditional flooding irrigation and traditional N application rate, flood irrigation was carried out after the fertilizers furrowing-applied) as a control, mobile water and fertilization (MWF, 62% tradition N application rate and 60% traditional irrigation amount, flood irrigation was carried out after the dissolved fertilizers injected into rhizosphere (20 cm deep) with a liquid-jet gun), optimum water and N (OWN, 69% tradition N application rate and 70% traditional irrigation amount, the fertilization and irrigation method were the same as those in the TWN treatment) and optimum water and N combined with the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) (OWN+DMPP, 1% DMPP was applied on the basis of the OWN treatment). The MWF, OWN and OWN+DMPP treatments significantly (P < 0.05) reduced the mean N2O fluxes with little effect on the NH3 volatilization rate. However, over the whole grape-growing season, the cumulative N2O total and yield-scaled N2O emissions in the three treatment groups were significantly reduced by 27.44–29.23% and 34.66–43.71%, respectively. In addition, the cumulative NH3 and yield-scaled NH3 volatilization were reduced by 4.13–6.61% and 21.81–26.15%, respectively. Notably, N2O emissions were significantly positively correlated with soil temperature, WFPS and NH4-N nitrogen contents, suggesting that these are the most important factors controlling N2O emissions in table grape plantations. Additionally, NH3 volatilization was closely related with soil temperature. Comprehensive evaluation showed that, based on the traditional water and N application rate, 38% N reduction combined with mobile water and fertilizer (MWF) effectively reduced the risk of N gaseous losses to the environment and saves irrigation water while maintaining grape yield.
      原文链接:
    • NSTL
    • Elsevier

    UAV-based multispectral vegetation indices for assessing the interactive effects of water and nitrogen in irrigated horticultural crops production under tropical sub-humid conditions: A case of African eggplant

    Mwinuka P.R.Mbungu W.B.Mbilinyi B.P.Mourice S.K....
    11页
    查看更多>>摘要：? 2022 The AuthorsUAV-based multispectral vegetation indices are often used to assess crop performance and water consumptive use. However, their ability to assess the interaction between water, especially deficit irrigation, and nitrogen application rates in irrigated agriculture has been less explored. Understanding the effect of water-nitrogen interactions on vegetation indices could further support optimal water and N management. Therefore, this study used a split plot design with water being the main factor and N being the sub-factor. African eggplants were drip irrigated at 100% (I100), 80% (I80) or 60% (I60) of the crop water requirements and received 100% (F100), 75% (F75), 50% (F50) or 0% (F0) of the crop N requirements. Results showed that the transformed difference vegetation index (TDVI) was best in distinguishing differences in leaf moisture content (LMC) during the vegetative stage irrespective of the N treatment. The green normalized difference vegetation index (GNDVI) worked well to distinguish leaf N during vegetative and full vegetative stages. However, the detection of the interactive effect of water and N on crop performance required a combination of GNDVI, NDVI and OSAVI across both stages as each of these 3 VI showed an ability to detect some but not all treatments. The fact that a certain amount of irrigation water can optimize the efficiency of N uptake by the plant is an important criterion to consider in developing crop specific VI based decision trees for crop performance assessments and yield prediction.
      原文链接:
    • NSTL
    • Elsevier

    Assimilating remote sensing data into a crop model improves winter wheat yield estimation based on regional irrigation data

    Ren W.He L.Zhang D.Wang D....
    15页
    查看更多>>摘要：? 2022 Elsevier B.V.Irrigation plays an important role in crop yield production in arid and semi-arid regions. However, irrigation effects have not been well addressed in the application of crop models at a regional scale due to limited data availability, which constrains the reliability and accuracy of simulation results. Assimilating remote sensing information into crop models can provide a viable approach to reduce associated uncertainties. In this study, regional irrigation data for winter wheat (Triticum aestivum L.) grown on the Loess Plateau was used to calibrate and validate the ChinaAgrosys (China Agricultural System) crop model at site and regional scales. Remote sensing data was then assimilated into the ChinaAgrosys crop model under four assimilation schemes. Two remotely sensed assimilation state variables (i.e., LAI and NDVI) and two assimilation algorithms (i.e., PSO (Partical swarm optimization) and SCE-UA (Shuffled complex evolution)) were considered. During the winter wheat growing season on the Loess Plateau, 30.6% of the wheat production area was irrigated once, 6.7% was irrigated two times, 3.7% was irrigated three times, and the remaining wheat area was rainfed. The R2 values between maturity date, LAI, and yield simulated by the ChinaAgrosys crop model and observations at 21 agrometeorological stations on the Loess Plateau were greater than 0.73, 0.44, and 0.60, respectively, during 2010–2015. The accuracy and spatial heterogeneity of winter wheat yield estimation were effectively improved by assimilating remote sensing data into the ChinaAgrosys crop model based on regional irrigation data. Under the four assimilation schemes, the combination of PSO+NDVI produced the highest accuracy for yield estimation in Hongtong county (92.8%), followed by SCE-UA+NDVI (92.0%). Our results demonstrated the importance of accounting for the spatial heterogeneity of water availability when applying a crop model in arid and semi-arid regions. Additionally, our analysis regarding different assimilation state variables and algorithms indicated that both simulation accuracy and calculation efficiency should be considered when assimilating remote sensing data into a crop model for simulating crop growth at regional scales.
      原文链接:
    • NSTL
    • Elsevier

    Encounter risk analysis of crop water requirements and effective precipitation based on the copula method in the Hilly Area of Southwest China

    Zhan C.Jiang S.Wang J.Liang C....
    12页
    查看更多>>摘要：? 2022 Elsevier B.V.The effective precipitation (Pe) and crop water requirements (ETc) can reflect the agricultural water supply and demand situations under natural precipitation conditions, and the encounter risk analysis of Pe and ETc is a prerequisite for regional water resources allocation and irrigation planning. Considering an entire growing season of rape-maize in the Hilly Area of Southwest China during 1961–2017, this study employed the popular copula functions to fit two-dimensional joint distribution of annual ETc and Pe, and analyzed the natural agriculture water shortages risk of different encounter situations. The results indicated ETc and Pe presented a negative relativity, and the Gaussian copula was found to be more suitable to estimate the joint distribution of ETc and Pe. The asynchronous encounter probability was higher two times than the synchronous encounter probability, and the pairs (rich Pe-poor ETc, poor Pe-rich ETc) had the greatest probability with value of 16.59%, indicating the natural water supply and demand usually was unmatched. The conditional probability of Pe without exceeding a certain value for different ETc states increased with increased Pe, and the conditional probability of ETc with exceeding a certain value for different Pe states decreased with increased ETc. The conditional probability of Pe without exceeding Pe 37.5%, Pe 62.5%, Pe average (ETc exceeding ETc 37.5%, ETc 62.5%, ETc average) for different ETc (Pe) states was 44.97–69.12% (the corresponding return period was 1.45–2.22 years), showing natural agriculture water shortages risk was high under general situations. However, the conditional probabilities of extremely high ETc (low Pe) with given low Pe (high ETc) were less than 3%, so extreme water shortages rarely occurred in the Sichuan Hilly Area. This study successfully applied the copula method to regional agricultural water shortages risk analysis and could provide a theoretical basis for regional water resources management and planning.
      原文链接:
    • NSTL
    • Elsevier

    Evaluation of efficiency and resilience of agricultural water resources system in the Yellow River Basin, China

    Lu C.Ji W.Hou M.Ma T....
    13页
    查看更多>>摘要：? 2022 Elsevier B.V.Resilience and efficiency are the core concepts of sustainable management of agricultural water resources system. This study constructed an evaluation system of the efficiency and resilience of agricultural water resources system (EAWRS, RAWRS) in the Yellow River Basin by comprehensively applying the analytic hierarchy process (AHP), entropy method (EVM), SBM-DEA model, and the development coordination model. The results showed that: (1) From 2005–2019, the EAWRS and RAWRS showed a fluctuating upward trend. The EAWRS increased significantly, especially the Baihe, Heihe, Luohe and Wudinghe river basins grew at a faster rate. However, the overall efficiency levels were still not high, and all the 72 prefecture-level administrative units were inefficient areas. The RAWRS was at a relatively low level, in which the Huangshui, Taohe and Qingshuihe river basins had rapid growth in resilience. (2) From the perspective of spatial differentiation characteristics, the EAWRS in Sichuan, Qinghai, Inner Mongolia, Shaanxi, Henan, and Shandong was relatively high, while that in Gansu, Shanxi and Ningxia was relatively low. The prefecture-level administrative units of the upstream river source area, Hetao Irrigation District, Fenwei Plain and Huanghuaihai Plain had a relatively high EAWRS. The RAWRS in the lower reaches was significantly better than that in the upper and middle reaches. (3) The development degree of the agricultural water resources system has gone through a process of rapid rise (2005–2013) - fluctuating growth (2014–2017) - rise (2018–2019), showing an “upstream-midstream-downstream” stepwise increasing pattern. The coordination degree of the agricultural water resources system showed a downward trend, and the decrease showed an “upstream-downstream-midstream” increasing pattern. (4) The three clusters divided by the average value of the development degree and coordination degree of the agricultural water resources system showed the changes from concentration to dispersion, in contrast, the coordination degree was gradually decreased.
      原文链接:
    • NSTL
    • Elsevier

    AquaCrop modeling to explore optimal irrigation of winter wheat for improving grain yield and water productivity

    Zhang C.Xie Z.Tang M.Feng S....
    13页
    查看更多>>摘要：? 2022 Elsevier B.V.Water shortage is the main constraint resulting in low crop yields in arid and semiarid areas, where irrigation is essential to sustain agricultural production. Unreasonable irrigation will not effectively improve crop yield but will cause a waste of water resources and a decrease in water productivity. The objectives of this study were intended to investigate the variability of yield and water productivity (WP) as a function of irrigation amount, time, and frequency and to explore optimal irrigation of winter wheat for improving grain yield and water productivity over a 60-year of long-term meteorological data (1961—2020). A water-driven model, AquaCrop model, was used to reproduce crop growth and yield responses to changes in water supply, with a total of 625 irrigation scenarios of irrigation amount and time. The results showed that there has been no significant change in seasonal ET0 (reference evapotranspiration) of winter wheat over the last 60 years. Instead, seasonal precipitation during the winter wheat growing cycle displayed a decreasing trend, potentially increasing the risk of meteorological drought. Despite the crop ET has remained stable at around 370 mm for the past 60 seasons, the grain yield and WP have steadily increased as the cumulative temperature increased. In all three typical meteorological years, crop average yield and ET were considerably improved under irrigation conditions compared with that in non-irrigated (rainfed). The total irrigation amounts of 90, 120, and 150 mm with two irrigation times in the wet, normal, and dry years, respectively, could achieve higher yields as well as the WP and IWP. Consequently, the optimal irrigation schedules in the wet, normal, and dry years were determined to be first irrigation in the wintering stage with 90 mm and second irrigation in the jointing stage with 0, 30, 60 mm, respectively. This work demonstrates that the AquaCrop model has a reliable accuracy for revealing crop growth and production under water deficit conditions and provides a technical means of application for formulating optimal irrigation schedules.
      原文链接:
    • NSTL
    • Elsevier

    Spatial variability of salt content caused by nonuniform distribution of irrigation and soil properties in drip irrigation subunits with different lateral layouts under arid environments

    Lin X.Wang Z.Li J.
    9页
    查看更多>>摘要：? 2022 Elsevier B.V.The nonuniformity of drip irrigation that is highly dependent on lateral layouts has been a concern for secondary soil salinization in arid regions. The effects of spatial variabilities in drip irrigated water and soil properties on soil salt content (SSC) distribution were therefore evaluated at a typical operational scale of subunits for a drip irrigation system. Two types of subunits with different lateral layouts, one with single end feeding laterals (S1) and one with dual-end feeding laterals (S2), were investigated during the 2018 and 2019 growing seasons of mulch drip irrigated cotton under arid environments. The distribution of the irrigation amount and SSC at the initial stage (prior to the first drip irrigation) and during the boll opening stage of cotton and the soil particle size distribution and bulk density in the subunits with different water feeding modes were determined. The results revealed that the Christianson uniformity coefficients (CUs) of the emitter discharge rate for S2 were 4–7% higher than those for S1, even when the area of S2 was 1.5 times that of S1. The more nonuniformly distributed irrigation water for S1 produced a more dispersed distribution of SSC, with CV ranging from 0.23 to 0.82, which was noticeably higher than the range of 0.13–0.34 for S2. The partial least squares analysis results demonstrated that the importance of the factors on the spatial variability of SSC followed an order of initial SSC > drip irrigation water > soil physical properties for S1 and initial SSC > soil physical properties > drip irrigation water for S2. The dual-end water feeding mode reduced the potential effect of the nonuniformity of irrigation water on SSC due to the improved uniformity on the subunit scale. Our study suggests that the dual-end feeding mode would be promising to avoid local salt harmfulness caused by the nonuniformity of SSC in the drip irrigation system.
      原文链接:
    • NSTL
    • Elsevier