Evapotranspiration and crop coefficients of melon plants measured by lysimeter and estimated according to FAO 56 methodology

Melo, Talyana K. de; Medeiros, José Francismar de; Sobrinho, José Espínola; Figueirêdo, Vladimir Batista; Souza, Paulo Sergio de

doi:10.1590/s0100-69162013000500005

Cited by 7 publications

(8 citation statements)

References 12 publications

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“…From the twentieth day after sowing, the Kcb BREB related well Allen et al (1998), Melo et al (2013) and Miranda et al (1999). Shrestha and Shukla (2014), who investigated watermelon plants grown on plastic mulch and observed that Kcb followed the increase in fc and transpiration increased with plant growth, becoming the main component of the ETc.…”

Section: Melon Etc and Basal Crop Coefficientssupporting

confidence: 76%

“…Miranda et al (1999) reported for the initial phase a Kc of approximately 0.2 and a mid-season Kc value > 1.0 under conditions without plastic mulch. Melo et al (2013) reported a 30 % underestimation of Kcb FAO compared with Kcb by lysimeter measurements. These authors suggested that the plastic mulch favored the increase in plant transpiration, which explains the much higher Kc value.…”

Section: Melon Etc and Basal Crop Coefficientsmentioning

confidence: 93%

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Energy balance and evapotranspiration of melon grown with plastic mulch in the Brazilian semiarid region

Borges

Silva

Sobrinho

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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Methods for obtaining evapotranspiration based on energy balance are potentially interesting for analyzing the impact of crop management practices on energy fluxes and, thus, the loss of water from the plant surface. Among the methods for estimating ET based on energy balance, the Bowen Ratio Energy Balance (BREB) has been well evaluated and is recommended by several authors for different crops (Irmak, et al., 2013;Hou et al., 2010;Zhang et al., 2010;Zeggaf et al., 2008).This study applied the BREB method to determine the crop coefficients of irrigated melon grown with plastic mulch and agrotextiles in the region of Mossoró, state of Rio Grande do Norte, Brazil, to provide more locally appropriate information to irrigators to maintain high yields with more efficient use of water. Materials and Methods Characteristics of the experimental site and crop practicesTwo field experiments were conducted in a melonproducing field in the municipality of Mossoró, in the

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Section: Melon Etc and Basal Crop Coefficientssupporting

confidence: 76%

Section: Melon Etc and Basal Crop Coefficientsmentioning

confidence: 93%

Energy balance and evapotranspiration of melon grown with plastic mulch in the Brazilian semiarid region

Borges

Silva

Sobrinho

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…A number of research studies were performed with mulch, mainly plastic sheets (Carvalho et al, 2012;Melo et al, 2013;Shukla et al, 2013Shukla et al, , 2014Zheng et al, 2013;Biswas et al, 2015;Borges et al, 2015;Yang et al, 2018;Zhang et al, 2018). Their effect was not considered since this review does not refer to the periods before the mid-season when impacts of mulch in lowering E s are greater.…”

Section: Fruit and Pod Vegetable Cropsmentioning

confidence: 99%

Standard single and basal crop coefficients for vegetable crops, an update of FAO56 crop water requirements approach

Pereira

Paredes

López-Urrea³

et al. 2021

Agricultural Water Management

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Many research papers on crop water requirements of vegetables have been produced since the publication of the FAO56 guidelines in 1998. A review of this literature has shown that determination of crop evapotranspiration (ET c ) using the K c -ET o approach, i.e., the product of the specific crop coefficient (K c ) by the reference evapotranspiration (ET o ), is the most widely-used method for irrigation water management. Consequently, a review was made to provide updated information on the K c values for these crops. The reviewed research provided various approaches to determine K c in its single and dual versions. With this purpose, actual crop ET (ET c act ) was determined with lysimeters, or by performing the soil water balance using measured soil water content and computational models, or by using Bowen ratio energy balance and eddy covariance measurements, or by using remote sensing applications. When determining the basal K c (K cb ), the partitioning of ET c act was evaluated using different approaches, though mainly using the FAO56 dual K c method. Since the accuracy of experimentally-determined K c and K cb values depends upon the procedure used to compute ET o , as well as accuracy in determining and partitioning of ET c act , the adequacy of the measurement requirements for each approach was carefully reviewed. The article discusses in detail the conceptual methodology relative to crop coefficients and the requirements for transferability, namely distinguishing between actual and standard K c and the need to appropriately use the FAO segmented K c curve. Hence, the research papers selected to update and consolidate mid-season and end-season standard K c and K cb were those that computed ET o with the FAO56 PM-ET o equation; and that also used accurate approaches to determine and partition ET c act for pristine, non-stressed cropping conditions. Under these experimental conditions, the reported K c and K cb values relative to the mid-and end-season could be considered as transferable standard K c and/or K cb values after adjustment to the standard climate adopted in FAO56, where average RH min = 45% and average u 2 = 2 m s −1 over the mid-season and late season growth stages. For each vegetable crop, these standard values were then compared with the FAO56 tabulated K c and K cb values to define the updated values tabulated in the current article. In addition, reported ancillary data, such as maximum root zone depth, maximum crop height, and soil water depletion fraction for no water stress, were also collected from selected papers and tabulated in comparison with those given for the crops in FAO56. The presentation of updated crop coefficient results is performed by grouping the vegetables differently than in FAO56, where distinction is made according to their edible parts:(1) roots, tubers, bulbs and stem vegetables; (2) leaves and flowers vegetables; (3) fruit and pod vegetables; and (4) herbs, spices and special crops, with most of them being newly introduced herein. The updated K c and K cb of veget...

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“…The coefficient of determination 0.8329 show a good adjustment between rates for Kc, enhancing the relevance of the referred to results for sugar cane irrigation management in the savannah region. Melo et al (2013) report that variations in Kc rates at short time intervals are caused by microclimate variations, differential growth of the plants, measurement mistakes due to hysteresis caused by the addition of water and by the loss of irrigation water by evaporation, expansion and contraction caused by temperature variations during the day, and other factors.…”

Section: Crop Coefficient For Sugar Canementioning

confidence: 99%

Sugar cane crop coefficient by the soil water balance method

Cardoso¹,

Oliveira²,

Teixeira³

et al. 2015

Afr. J. Agric. Res.

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Current assay, conducted on the experimental farm of the Goiás Federal Institute, campus at Urutaí GO Brazil, determines the crop coefficient (Kc) for sugar cane in the Brazilian savannah at several phases of development. Kc was determined by the soil water balance method in a 3.0 m 3 suspended drainage lysimeter, measuring 1.0 m in width and height and 3.0 m in length. Reference evapotranspiration (ET 0) was determined by Penman-Piche's equation with data on air evaporating capacity with Piche's evaporimeter. Crop evapotranspiration (ETc) was performed by the amount of water available at the bottom of the lysimeter. Irrigation occurred when water capacity on the soil reached-100 KPa, by employing drip subsurface irrigation system. Coefficients of sugar cane crop at different phases were 0.31 (initial), 1.15 (crop development), 1.25 (mid-season) and 0.90 (late season). Crop coefficient values were similar to the suggested by FAO-33.

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Evapotranspiration and crop coefficients of melon plants measured by lysimeter and estimated according to FAO 56 methodology

Cited by 7 publications

References 12 publications

Energy balance and evapotranspiration of melon grown with plastic mulch in the Brazilian semiarid region

Energy balance and evapotranspiration of melon grown with plastic mulch in the Brazilian semiarid region

Standard single and basal crop coefficients for vegetable crops, an update of FAO56 crop water requirements approach

Sugar cane crop coefficient by the soil water balance method

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