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Spectral signature-based water stress characterization and prediction of wheat yield under varied irrigation and plant bio-regulator management practices

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Title Spectral signature-based water stress characterization and prediction of wheat yield under varied irrigation and plant bio-regulator management practices
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Creator Bal, S.K., Wakchaure, G.C., Potekar, S., Choudhury, B.U., Choudhary, R.L. and Sahoo, R.N
 
Subject Canopy spectral reflectance Line-source sprinkler system Plant bio-regulators (PBRs) Water stress indices Wheat Yield prediction
 
Description Not Available
Canopy reflectance based spectral indices help in effective irrigation scheduling of wheat for optimization of yield in
water-scarce regions. A field experiment for two consecutive years (2013 to 2015) was conducted to evaluate the responses
of wheat crop to exogenous application of plant bio-regulators (PBRs) in the water-scarce Deccan region of India
(Baramati, Pune, Maharashtra). We predicted grain and biomass yields of wheat using water stress-sensitive spectral
indices under varied water regimes. The water regimes were seven levels of irrigation water (equaling to 1.00, 0.85, 0.70,
0.55, 0.40, 0.25 and 0.10 times of cumulative open pan evaporation, CPE) and (applied using a line-source sprinkler
system). There were five PBRs, viz. thiourea, salicylic acid, potassium nitrate, gibberellin and ortho-silicic, with concentration 10 mM, 10 lM, 15 g L-1
, 25 ppm and 8 ppm, respectively, applied at various growth stages, namely crown
root initiation, flag leaf and seed milking stages. Water stress indices were computed from spectral reflectance pattern
recorded at different crop growth stages using ASD FieldSpec-4 Spectroradiometer (350–2500 nm). The PBRs significantly influenced the canopy reflectance pattern and maintained superior values of water stress indices over the control (without PBRs) by stabilizing leaf pigments and water contents, controlling the stomatal opening and better water use
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Date 2023-05-09T04:44:09Z
2023-05-09T04:44:09Z
2020-01-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/76976
 
Language English
 
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Publisher Not Available