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Influence of sowing seasons and irrigation levels on surface energy balance, radiation utilization and water use efficiency of sunflower in an eastern Indian watershed.

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Title Influence of sowing seasons and irrigation levels on surface energy balance, radiation utilization and water use efficiency of sunflower in an eastern Indian watershed.
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Creator Gouranga Kar , Ashwani Kumar
 
Subject Crop water use, Energy balance, Phenology, Radiation use efficiency, Sunflower
 
Description Not Available
Surface energy balance, water use efficiency and radiation utilization efficiency of
sunflower were studied under different sowing dates and irrigation regimes in
Bahasuni watershed, Dhenkanal, Odisha. The latent heat flux of the crop varied
with the photo-thermal environments and values ranged between 8.64 to 18.77 MJ
m day under different treatments. It was revealed that during mid-growth stage
when canopy was fully developed and water did not limit transpiration (wet soil),
latent heat flux consumed most of the energy from net radiation. As the soil dried
towards maturity, water became less available for evapotranspiration and the
energy was used mostly for heating the soil (soil heat flux) or heating the air
(sensible heat flux). Supplemental irrigations had significant effects on crop
growth and radiation utilization efficiency (RUE) of the crop in dry season. Mean
values of RUE were 1.44, 1.63 and 1.73 gMJ with three, four and five irrigations,
respectively. The water use efficiency (WUE) of the crop also varied with sowing
dates and irrigations. Averaged over years and irrigations, winter season crops
registered high WUE with the values being 3.16 and 3.28 kg ha mm for second
(October-February) and third sown (June-November) crops, respectively.
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Date 2022-01-03T10:01:21Z
2022-01-03T10:01:21Z
2015-01-01
 
Type Article
 
Identifier Kar, G., Ashwani Kumar. 2015. Influence of sowing seasons and irrigation levels on surface energy balance, radiation utilization and water use efficiency of sunflower in an eastern Indian watershed. Indian Journal of Soil Conservation, Vol. 43, No. 1, pp 63-71,
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http://krishi.icar.gov.in/jspui/handle/123456789/68473
 
Language English
 
Relation Not Available;
 
Publisher Not Available