Comparison of two canopy resistance models to estimate evapotranspiration for tea and wheat in southeast China

Yan, Huimin; Yu, Jianjun; Zhang, Chuan; Wang, Guoqing; Huang, Song; Ma, Jiamin

doi:10.1016/j.agwat.2020.106581

Cited by 17 publications

(19 citation statements)

References 46 publications

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“…ET plays a key role in irrigation water application, especially in arid and semi-arid areas. 1 , 2 In semi-arid and arid areas, ET accounts for more than 80% of the total water consumption of farmland. 3 − 10 The determination of ET is critical for guiding agricultural water use and improving irrigation management.…”

Section: Introductionmentioning

confidence: 99%

“… 24 The key to each time scale lifting method is to associate the daily ET with a factor, which is usually a constant during the day or throughout the diurnal cycle. 2 The accuracy of these methods’ applicability varies in different environments. 25 − 36 …”

Section: Introductionmentioning

confidence: 99%

“…Some researchers have verified the above results through their research. 1 , 2 , 17 , 38 Some researchers have doubted the applicability of the EF method and have considered that the evaporation ratio needs to be corrected to meet the basic assumptions of the time scale. 39 Researchers have further verified the applicability of the EF method.…”

Section: Introductionmentioning

confidence: 99%

“…However, some scholars pointed out that in case there is large deviation in the calculation of reference crop ET, the estimation effect may be poor due to the limitation of its definition. 2 , 44 Some researchers found that the canopy resistance during the daytime was stable in the model of P-M. 45 , 46 This canopy resistance characteristic is employed to scale up the instantaneous ET. 17 , 47 Liu et al 41 obtained the daily ET by this method at a specific time and achieved good results.…”

Section: Introductionmentioning

confidence: 99%

“…Ayman Nassar 1 used different methods to improve the time scale of ET for grapes in California, and the results showed that different methods had different effects in different growth stages and different time periods. Haofang Yan 2 conducted experiments in tea and wheat fields in Jiangsu Province, and the results showed that the EF method and the EF′ method had better effects than other methods, and the effect was the best at noon. The above studies show that different time-scale methods of ET have different applicabilities to different climate zones and different crop types.…”

Section: Introductionmentioning

confidence: 99%

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Effective Method of Estimating the Daily Evapotranspiration of Greenhouse Grapes in the Cold Area of Northeast China

et al. 2022

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Evapotranspiration (ET) is an important basis and key link for guiding irrigation. One of the key problems to be solved is how to predict the dynamic change in the daily ET and estimate the total amount of ET in greenhouse through limited instantaneous data. In this paper, it is estimated that the daily scale of evapotranspiration by using four methods, including the evaporative fraction method (EF method), the reference evaporative fraction method (EF′ method), the sine method, and the canopy resistance method ( r c method), is based on the measured ET data of grapes in a solar greenhouse in Northeast China. The relative root-mean-square pair error (RRMSE) and the efficiency coefficient (ε) are also used to study their applicability in terms of leaf area index, radiation degree, and scale-up time point. In the results, under the condition of different LAI, the simulation accuracies of ET scaled by the four methods ranked as follows (from highest to lowest): the reference evaporative fraction method, the evaporative fraction method, the sine method, and the canopy resistance method. The average RRMSE and ε of the evaporative fraction method with the best simulation accuracy were 7.19–16.46% and 0.61–0.75, respectively. Under different radiation conditions, the simulation accuracies of the four methods ranked as follows (from highest to lowest): the evaporative fraction method, the reference evaporative fraction method, the sine method, and the canopy resistance method. Under different radiation conditions, the RRSME of the four methods ranged from 11.55 to 46.62%, and the maximum of ε was 0.75. The evaporative fraction and reference evaporative fraction methods had the highest simulation accuracy, whereas the reference evaporative fraction method required fewer parameters. We concluded that the reference evaporative fraction method was the best for estimating the daily ET of greenhouse grapes in the cold area of Northeast China.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effective Method of Estimating the Daily Evapotranspiration of Greenhouse Grapes in the Cold Area of Northeast China

et al. 2022

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Effects of straw application on soil hydrothermal conditions and crop yield in a maize and wheat rotation system

Du,

Zhang,

Chen

et al. 2024

Hydrological Processes

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The addition of crop straw is considered an important measure for sustainable agricultural production. Crop straw when incorporated into the soil affects crop growth and development by changing the hydrothermal conditions of the soil. However, quantitative studies that inform on the mechanisms by which added straw or straw biochar (SSB) affects hydrothermal response of soil and thereby crop productivity in lime concretion black soil (LCBS) are lacking. Moreover, the sustained effects during continuous cropping are less well understood. The impact of SSB on soil properties and crop yields in a typical LCBS area was systematically investigated through field experiments with maize and wheat rotations. Four treatments were set: straw (S), fertilizer (F), straw with fertilizer (SF) and straw biochar with fertilizer (BF). The results indicated that soil water‐holding capacity and rainfall storage efficiency were improved in BF and SF treatments. Compared with the F treatment, the soil water storage increased by 80%–98% and the response time of soil water to rainfall was advanced by approximately 4 h in the other three treatments during the maize season. BF and SF treatments only increased soil water storage by 6.8% due to the lack of rainfall during the wheat season. Soil inorganic nitrogen and available phosphorus were significantly increased in SF treatment by 101.1% and 32.9% compared with BF treatment in the wheat season. Considering crop plant height, leaf area index and yield, SF and BF treatments were beneficial to crop growth and improved water use efficiency. They did not increase maize yield significantly, with a maximum increase of 2.1% in BF treatment compared with F treatment. But, SF treatment significantly increased wheat yield by 11.8% and BF treatment increased wheat yield by 6.7%. Overall, this study illustrated the positive effects of SSB additions on the production of LCBS from multiple perspectives. This will provide reference for improving the soil hydrothermal conditions of LCBS and ensure food security.

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Effects of film mulching on the physiological and morphological parameters and yield of cucumber under insufficient drip irrigation

Yan

Zhang

et al. 2022

Irrigation and Drainage

Self Cite

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A comprehensive study was conducted to analyse the influence of film mulching on the soil water content (SWC), plant physiological and morphological parameters, yield and irrigation water use efficiency (IWUE) of cucumber grown in a greenhouse. The experiment was designed to set the film mulching (M1) and non‐film mulching (M0) applications under two irrigation levels (T1: sufficient irrigation; T2: insufficient irrigation). Thus, four treatments, i.e. T1M1, T1M0, T2M1 and T2M0 were set. The response of plant growth, physiology characteristics, yield and SWC under the designed treatments was analysed based on the data from two planting years (2019 and 2020). Applying film mulching effectively improved the SWC by approximately 10%. The cucumber plant height, stem diameter and leaf area index (LAI) under the T2M1 treatment increased by 38.0–63.1, 16.5–24.9 and 84.0–89.4%, respectively, compared to the T2M0 treatment. The maximum yield was found in the T1M1 treatment, which increased by 24.2–27.5% compared to T1M0. Film mulching increased cucumber yield by 18.0–24.7% compared to non‐film mulching. It was also observed that film mulching under insufficient drip irrigation had a positive influence on plant morphological parameters (photosynthetic rate and stomatal conductance). Among the four treatments, the maximum photosynthetic rate (= 20.69 μmol m−2 s−1) and stomatal conductance (= 0.47 μmol m−2 s−1) were found in the T2M1 treatment. The sap flow rate under the T2M1 treatment was close to that under the T1M0 treatment, while the largest variation in the sap flow rate occurred under the T1M1 treatment, and the smallest variation occurred under the T2M0 treatment. It can be concluded that the effect of the film mulching technique on cucumber yield and IWUE was significant under insufficient drip irrigation.

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Comparison of two canopy resistance models to estimate evapotranspiration for tea and wheat in southeast China

Cited by 17 publications

References 46 publications

Effective Method of Estimating the Daily Evapotranspiration of Greenhouse Grapes in the Cold Area of Northeast China

Effective Method of Estimating the Daily Evapotranspiration of Greenhouse Grapes in the Cold Area of Northeast China

Effects of straw application on soil hydrothermal conditions and crop yield in a maize and wheat rotation system

Effects of film mulching on the physiological and morphological parameters and yield of cucumber under insufficient drip irrigation

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