Coupling evapotranspiration partitioning with water migration to identify the water consumption characteristics of wheat and maize in an intercropping system

Ma, Longshuai; Li, Yinjuan; Wu, Pute; Zhao, Xining; Chen, Xiaoli; Gao, Xiaodong

doi:10.1016/j.agrformet.2020.108034

Cited by 38 publications

(27 citation statements)

References 68 publications

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“…This result suggests that Es was the most important ET component for highland barley in Tibet, and most of the water was lost through soil evaporation, which was similar to the results in arid climate regions [5,26,39]. The ET of highland barley was similar to that of spring maize [40] and winter wheat [4] in northern China, yet higher than that of corn under microirrigation systems in a semiarid environment [28]. However, large differences in the ET components varied widely among different crops and regions.…”

Section: Et Components Of Highland Barley In Tibetsupporting

confidence: 77%

“…Generally, the ET, Ec, and the Ec/ET ratio in hot and humid areas were higher than those in arid and semiarid areas [23]. For example, ET, Ec and the Ec/ET ratio of wheat in eastern China [2] with humid climate were higher than those in western China with arid climate [4], and ET, Ec, and Ec/ET ratio of crops in southern China with hot temperature [24] were higher than those in northern China with cold temperature [25]. Previous studies revealed that Ec generally accounted for a large proportion of ET [6,26], while Es became a major component in arid and semiarid areas [27,28].…”

Section: Introductionmentioning

confidence: 86%

“…ET and its components play key roles in linking ecosystem functioning, climate feedbacks, and water resources [3]. Crop water consumption by ET is a critical parameter for water and energy exchanges in the agriculture continuum [4]. Understanding the dynamic and characteristics of crop ET components is of great significance in the estimation of water requirements for agricultural irrigation [5], evaluation of water use efficiency [6], and development of optimal irrigation schedule [7].…”

Section: Introductionmentioning

confidence: 99%

“…Many previous studies used the micro lysimeter and sap flow, respectively, to measure the Es and Ec of crops such as wheat [4], maize [8,9], and tomato [10], the results suggested that sap flow was a useful tool to measure Ec of crops at an instantaneous interval [8]. As far as short-stalk, closed-system planting crops such as wheat and rice were concerned, Ei was often measured with classic water wiping method [4], while it was usually calculated using the water balance method for maize, in which throughfall was collected with rainfall collectors, and stemflow was collected with collars attached around the maize stems, and then stemflow in collars was drained to collectors using a slot with a transfer hose [9]. Ma and Song [2] explored the isotope tracing technique coupled with the water balance method for partitioning ET of winter wheat under different irrigation and fertilization treatments during growing seasons.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with Ec and Es, Ei was not a major component of ET, while it was an important ET component of the soil-vegetation-atmosphere continuum, regulating the reallocation of rainfall reaching the canopy [26]. However, this component was often neglected in many studies on ET partitioning [4,29]. Ei was significantly affected by the structure of the canopy and by precipitation; the crop with higher leaf area and vegetation cover generally yielded higher Ei [30].…”

Section: Introductionmentioning

confidence: 99%

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Evapotranspiration Components Dynamic of Highland Barley Using PML ET Product in Tibet

Chen

Tan

et al. 2021

Remote Sensing

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Highland barley is the unique germplasm resource and dominant crop in Tibet with low-level precipitation and a severe shortage of available water resources. Understanding the characteristics and dynamics of evapotranspiration (ET) components (vegetation transpiration (Ec), soil evaporation (Es), and canopy interception evaporation (Ei)) of highland barley can help better optimize water management practices. The seasonal and interannual variations in ET components of highland barley were investigated using the PML-V2 ET product during 2001–2020. The results suggested that Es was the most important ET component and accounted for 77% of total ET for highland barley in Tibet. ET components varied obviously over the altitude, Es, and Es/ET ratio; a decreasing trend was observed with the increase in altitude from 3500 m to 3800 m and then this changed to an increasing trend until reaching the altitude of 4100 m, while Ec, Ei, and their ratios presented an opposite changing pattern to that of Es. Seasonal variation in daily ET components of highland barley displayed a parabolic pattern, peaked in August, while the temporal distributions differed considerably among different ET component ratios. The seasonal variations in ET components were correlated significantly with air temperature, relative humidity, and precipitation, while ET components ratios were more influenced by the environment, irrigation practice, and management rather than meteorological variables. Es and its ratio in highland barley decreased significantly during 2001–2020, while the Ec/ET ratio generally showed an opposite trend to the Es/ET ratio, and Ei and its ratio presented an insignificantly decreasing trend. The interannual variations in ET components were not correlated significantly with meteorological variables, while Ei was more influenced by meteorological variables, especially the precipitation characteristics.

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Section: Et Components Of Highland Barley In Tibetsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evapotranspiration Components Dynamic of Highland Barley Using PML ET Product in Tibet

Chen

Tan

et al. 2021

Remote Sensing

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Photosynthesis, yield, energy balance, and water‐use of intercropped maize and soybean

2021

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By 2050, the U.S. Corn Belt will likely face a 23% increase in leaf-to-air vapor pressure deficit (VPD L ), the driving force of evapotranspiration (ET), which may restrict maize yield improvements for rainfed agroecosystems. Alternative cropping systems, such as maize and legume intercrops, have previously demonstrated yield and resource-use advantages over monocultures. In this study, the residual energy balance approach was used to gain insights into how an additive simultaneous maize and soybean intercrop system regulates ET and water-use efficiency (WUE) compared to standard maize and soybean monoculture systems of the U.S. Corn Belt.Experimental field plots were rain-fed and arranged in a randomized complete block design in three blocks. Photosynthetic capacity and grain yield of maize were conserved in the intercrop. However, its competitive dominance shaded 80%-90% of incident light for intercropped soybean at canopy closure, leading to a 94% decrease in grain yield compared to soybean monoculture. The total grain yield per unit area of the additive intercrop (land-use efficiency) increased by 11% AE 6%(1 SE). Compared to maize monoculture, the intercrop had higher latent heat fluxes (λET) at night but lower daytime λET as the intercrop canopy surface temperature was approximately .25 C warmer, partitioning more energy to sensible heat flux.However, the diel differences in λET fluxes were not sufficient to establish a statistically significant or biologically relevant decrease in seasonal water-use (ΣET).Likewise, the increase in land-use efficiency by the intercrop was not sufficient to establish an increase in seasonal water-use efficiency. Intercropping high-performing maize and soybean cultivars in a dense configuration without negative impact suggests that efforts to increase yield and WUE may lead to improved benefits.

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Comparison of water consumption for the conversion of croplands to orchards in dryland ecosystems

Zhang

Seki

et al. 2022

Soil Science Soc of Amer J

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Evapotranspiration (ET) is the main ecological and soil water consumption process in terrestrial ecosystems. Previous studies have investigated ET partitioning across sites and plants; however, direct comparisons of water consumption before and after the transition from one crop to another are scarce. The variation in and proportion of ET and its subcomponents as well as the change in soil water storage (SWS) were compared in maize (Zea mays L.) croplands and apple (Malus domestica auct. non Borkh. cv. Fuji) orchards in four active (approximately May to September) and three inactive growth periods on the southern Loess Plateau, China. Soil water evaporation (E s ) accounted for 36.3 and 37.7% of the total ET for cropland and orchard, respectively, in the active growth period. The canopy interception (I c ) significantly differed between cropland and orchard. The mean I c /ET for cropland and orchard was 23.1 and 22.7%, respectively, in the active growth period, showing that the effects of I c on ET partitioning should not be ignored. The mean ratio of transpiration (T) to ET for cropland was 2.8% less than that for orchard during the active growth period. The T/ET of cropland peaked twice in each active growth period. Precipitation (P) met the water consumption requirements of crop growth in the active growth period. The ET of cropland and orchard in the inactive growth period accounted for 29.4 and 31.8% of the ET for the hydrological year, respectively. These results help assess water consumption and soil sustainability under changes in crops in dryland agricultural ecosystems. INTRODUCTIONAny precipitation (P) that passes through the vegetated landscape is bound to interact with plant surfaces (Van Stan et al., 2020). Before falling to the ground, a portion of P is first

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Coupling evapotranspiration partitioning with water migration to identify the water consumption characteristics of wheat and maize in an intercropping system

Cited by 38 publications

References 68 publications

Evapotranspiration Components Dynamic of Highland Barley Using PML ET Product in Tibet

Evapotranspiration Components Dynamic of Highland Barley Using PML ET Product in Tibet

Photosynthesis, yield, energy balance, and water‐use of intercropped maize and soybean

Comparison of water consumption for the conversion of croplands to orchards in dryland ecosystems

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