scholarly journals DIURNAL ENERGY BALANCE STUDIES OVER WHEAT USING BOWEN RATIO ENERGY BALANCE METHOD

MAUSAM ◽  
2022 ◽  
Vol 45 (4) ◽  
pp. 333-336
Author(s):  
A.S. Mokate ◽  
M. C. VARSHNEYA ◽  
T. R .V. NAIDU
Keyword(s):  
Energy Balance ◽  
Latent Heat ◽  
Bowen Ratio ◽  
Balance Method ◽  
Energy Balance Method ◽  
Heat Partitioning ◽  
Ratio Energy

Enelll:Y bala nce study was cond ucted uver ....n eat crop at its vari ou s Ilru"'1h stases unde r irriga tedcondition .. usine Bo~'e11 Rat io Enere)' Balance (HRt:lH 1U~1huJ . On clea r days net radi auo i. (R.> ranee.! from S17 10()l)4 w mc TIH" mi d-day latent heat partitioning was appnlJ.imalely H9. lUI. 92 and 1m", o f R. at joinung, flowe ring.soli doujh find ha rd d uugh stage s re spectlve ry. The soil heat n ux (5) was approximatel y 6 to 13%of R" a nd wasminimum .11 "nfl ,toul!'h ..tage. Th e se ns ible heat udvecu ou ""liS found In be a common ph enomenon a nd comrtbutedapp U),'(iOl;\td)' 1 to S"'" o f R. a t mid -liar a nd ihi Inten ..il)' wa s 1Il 0~ afte r 1401.) hOI at all stases  

Estimation of seasonal crop water consumption in a vineyard using Bowen ratio-energy balance method

2007 ◽  
Vol 21 (26) ◽  
pp. 3635-3641 ◽  
Author(s):  
B. Z. Zhang ◽  
S. Z. Kang ◽  
L. Zhang ◽  
T. S. Du ◽  
S. E Li ◽  
...  
Keyword(s):  
Energy Balance ◽  
Water Consumption ◽  
Bowen Ratio ◽  
Balance Method ◽  
Crop Water ◽  
Energy Balance Method ◽  
Crop Water Consumption ◽  
Ratio Energy

The role of decoupling factor on sugarcane crop water use under tropical conditions

2019 ◽  
Vol 55 (6) ◽  
pp. 913-923 ◽  
Author(s):  
Daniel Silveira Pinto Nassif ◽  
Leandro Garcia da Costa ◽  
Murilo dos Santos Vianna ◽  
Kassio dos Santos Carvalho ◽  
Fabio Ricardo Marin
Keyword(s):  
Energy Balance ◽  
Irrigation Management ◽  
Bowen Ratio ◽  
Balance Method ◽  
Crop Water ◽  
Flow Measurements ◽  
Energy Balance Method ◽  
Sugarcane Crop ◽  
Tropical Conditions ◽  
Ratio Energy

AbstractThe expansion of sugarcane crop to regions with lower water supply in Brazil has increased the importance of correct estimation of crop water requirements. Currently, the irrigation management is generally done using the crop coefficient (Kc) based on the FAO 56 bulletin. Kc is used to determine the potential water demand of the crop for a given period of time and is considered constant for each crop stage. However, some recent studies have shown that Kc can be significantly variable under different evapotranspiration (ETo) rates. This paper aimed to analyse sugarcane water consumption at different scales: plant (sap flow measurements by energy balance method); canopy (Bowen ratio energy balance method); and plant–atmosphere coupling (infrared gas analyser) to reduce the uncertainties on the irrigation practices. Measurements were taken at two experimental sites, where a modern Brazilian cultivar CTC 12 was grown under drip irrigation and an old main Brazilian cultivar (RB867515) was grown under sprinkler irrigation by a central pivot. The mean crop evapotranspiration (ETc) values by the Bowen ratio energy balance method were 2.92 and 3.68 mm d−1 for RB867515 and CTC 12, respectively, resulting in a mean Kc of 0.99 at the full vegetative growth stage. Kc values were dependent on ETo and varied between 0.2 and 1.7 for both cultivars. This occurred in a crop coupled to the atmosphere (Ω = 0.37) and was the same found in other coupled crops such as coffee and citrus. In conclusion, the sugarcane Kc for southeast Brazil presented temporal variability due to coupling conditions according to reference evapotranspiration, and this should be considered in irrigation management.

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