Estimating and partitioning maize evapotranspiration as affected by salinity using weighing lysimeters and the SIMDualKc model

Liu, Meihan; Shi, Haibin; Paredes, Paula; Ramos, Tiago B.; Dai, Liping; Feng, Zhuangzhuang; Pereira, Luís S.

doi:10.1016/j.agwat.2021.107362

Cited by 19 publications

(7 citation statements)

References 115 publications

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“…The derived functions combine yield-salinity equations [92] with yield-ET equations [119]. The resulting equation provides a first approximation of the reduction in evapotranspiration expected under various salinity conditions and has been widely used in field conditions (e.g., [120][121][122]). Crop yields remain at potential levels until a specific threshold of electrical conductivity of the saturated soil water extract (EC e threshold ) is reached [99,118].…”

Section: Salinity and Water Productivity In The Msrpsmentioning

confidence: 99%

The Mangrove Swamp Rice Production System of Guinea Bissau: Identification of the Main Constraints Associated with Soil Salinity and Rainfall Variability

Garbanzo,

Cameira,

Paredes

2024

Agronomy

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Mangrove swamp rice production (MSRP) refers to rice cultivation in former mangrove soils that have been anthropogenically modified for food production. The method utilizes the largest possible storage of fresh water to desalinate the soils and make them productive. However, temporal variability in rainfall patterns causes loss of efficiency in production, impacting crop growth and reducing productivity. To improve MSRP, it is necessary to identify the primary constraints associated with salinity, enhancing and maximizing freshwater storage efficiency and water productivity. This study provides a general description of the MSRP system in both the northern and southern regions of Guinea-Bissau, aiming at the identification of the main water management limitations. The description involves the use of typologies and the identification of zones with specific characteristics within the paddies. Furthermore, this review includes an analysis of the physicochemical characteristics of soils in relation to salinity issues, descriptions of agronomic management, rice varieties, and the significance of managing dikes and bunds to improve mangrove swamp rice water management. This study shows how the MSRPS is characterized by dynamism and complexity, involving a wide range of constraints associated with salinity features, cultural influences, and microclimatic conditions that are subject to temporal variations.

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Section: Salinity and Water Productivity In The Msrpsmentioning

confidence: 99%

The Mangrove Swamp Rice Production System of Guinea Bissau: Identification of the Main Constraints Associated with Soil Salinity and Rainfall Variability

Garbanzo,

Cameira,

Paredes

2024

Agronomy

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“…The potential evapotranspiration of bare land is PET 1 . In order to simulate the soil water balance when sunflowers were planted, the dual crop coefficient [38,39] method was used to calculate crop transpiration (T c ) and soil evaporation (E s ), respectively, to estimate potential evapotranspiration (PET 2 ) during sunflower planting.…”

Section: Model Inputmentioning

confidence: 99%

Study on Water and Salt Transport under Different Subsurface Pipe Arrangement Conditions in Severe Saline–Alkali Land in Hetao Irrigation District with DRAINMOD Model

Tian,

Miao,

Shi

et al. 2023

Water

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As an effective method to improve saline–alkali land, the drainage from subsurface pipes has been extensively studied in typical arid and semi-arid agricultural areas (Hetao Irrigation District). However, there are few studies on the improvement of subsurface pipe layout and the long-term soil salinization control in the process of leaching and soil amendment with subsurface pipes in this area. This study investigated the water and salt migration in the process of amending the heavy saline soil. Field experiments growing sunflowers and numerical model calculation were combined in this research. It was found in the field experiment that the salt concentration in the surface pipe drainage was positively correlated with the salt content in the soil and the depth of the pipe, while it was negatively correlated with the amount of irrigation water and the spacing of crops. Thus, the soil desalting rate (N) and salt control rate (SCR) were positively correlated with the depth of the pipe, and they were negatively correlated with the spacing. The leaching effect of irrigation would decrease when the soil salt content decreased. On the basis of field experiments, the DRAINMOD model and drainmod equation were used to calculate the water and salt migration in 38 different field plots during 2019 and 2020. When N was the same, the soil salinity in several plots with large burial depth could be controlled below the salt tolerance threshold of sunflowers during the growth period in the second year. The quantitative relationship between N and SCR, soil salt content before leaching, water amount of leaching, pipe spacing and buried depth was already established. These results can help develop strategies for desalination and salt control in the soil in the arid and semi-arid areas with the optimal layout of subsurface pipes.

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“…These methods were reviewed by Kool et al [ 14 ] and classified into two categories: models and measurements. The commonly used models were the Shuttleworth–Wallace model [ 19 ] and its improved structures [ 20 , 21 , 22 , 23 , 24 , 25 ], the clumped model [ 26 , 27 ], the FAO-56 dual crop coefficient model [ 28 , 29 , 30 ] and other improved dual-source models [ 31 , 32 , 33 ], while measurements were mainly eddy covariance techniques [ 34 , 35 , 36 , 37 , 38 ] and Bowen ratio systems [ 39 , 40 , 41 ] (acquiring ET), stable isotopes [ 42 , 43 , 44 , 45 ] (acquiring E s or T ), sap flow meters [ 46 , 47 , 48 , 49 ] (acquiring T ), microlysimeters [ 50 , 51 , 52 ] (acquiring E s ) and water collection tanks [ 53 , 54 ] (acquiring E i ). Among these methods, the modeling approach has the advantage of its applicability over a wide range of time scales and can be applied to the spatial scale of an entire ecosystem [ 55 , 56 ], but these models always require complex parameterizations and still require validation.…”

Section: Introductionmentioning

confidence: 99%

Environmental Controls on Evapotranspiration and Its Components in a Qinghai Spruce Forest in the Qilian Mountains

Gao,

Guo,

Feng

et al. 2024

Plants

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Qinghai spruce forests, found in the Qilian mountains, are a typical type of water conservation forest and play an important role in regulating the regional water balance and quantifying the changes and controlling factors for evapotranspiration (ET) and its components, namely, transpiration (T), evaporation (Es) and canopy interceptions (Ei), of the Qinghai spruce, which may provide rich information for improving water resource management. In this study, we partitioned ET based on the assumption that total ET equals the sum of T, Es and Ei, and then we analyzed the environmental controls on ET, T and Es. The results show that, during the main growing seasons of the Qinghai spruce (from May to September) in the Qilian mountains, the total ET values were 353.7 and 325.1 mm in 2019 and 2020, respectively. The monthly dynamics in the daily variations in T/ET and Es/ET showed that T/ET increased until July and gradually decreased afterwards, while Es/ET showed opposite trends and was mainly controlled by the amount of precipitation. Among all the ET components, T always occupied the largest part, while the contribution of Es to ET was minimal. Meanwhile, Ei must be considered when partitioning ET, as it accounts for a certain percentage (greater than one-third) of the total ET values. Combining Pearson’s correlation analysis and the boosted regression trees method, we concluded that net radiation (Rn), soil temperature (Ts) and soil water content (SWC) were the main controlling factors for ET. T was mainly determined by the radiation and soil hydrothermic factors (Rn, photosynthetic active radiation (PAR) and TS30), while Es was mostly controlled by the vapor pressure deficit (VPD), atmospheric precipitation (Pa), throughfall (Pt) and air temperature (Ta). Our study may provide further theoretical support to improve our understanding of the responses of ET and its components to surrounding environments.

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Estimating and partitioning maize evapotranspiration as affected by salinity using weighing lysimeters and the SIMDualKc model

Cited by 19 publications

References 115 publications

The Mangrove Swamp Rice Production System of Guinea Bissau: Identification of the Main Constraints Associated with Soil Salinity and Rainfall Variability

The Mangrove Swamp Rice Production System of Guinea Bissau: Identification of the Main Constraints Associated with Soil Salinity and Rainfall Variability

Study on Water and Salt Transport under Different Subsurface Pipe Arrangement Conditions in Severe Saline–Alkali Land in Hetao Irrigation District with DRAINMOD Model

Environmental Controls on Evapotranspiration and Its Components in a Qinghai Spruce Forest in the Qilian Mountains

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