International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (1289) Last page : (1294)
Article doi: http://dx.doi.org/10.18782/2320-7051.5576
Influence of Stress Mitigating Compounds on Biophysical Parameters & Yield and Yield Attributes under Drought Conditions in Groundnut (Arachis hypogea L.)
Harish Menpadi* and Patil R. P.
Department of Crop Physiology, College of Agriculture, UAS, Raichur.-584104 Karnataka, India
*Corresponding Author E-mail: harishmenpadi77@gmail.com
Received: 22.07.2017 | Revised: 4.08.2017 | Accepted: 5.08.2017
ABSTRACT
A Field experiment was conducted during the year 2014-15 at Agriculture College Farm, Raichur to investigate the appropriate technology to overcome the ill effects of water stress on growth and development of groundnut crop. Water stress plots were treated with various stress mitigating compounds, significantly higher pod yield was recorded with application of Triacontanol @2.0 ml/l (28.3 q/ha) followed by KCl @ 2.5% (26.9 q/ha) Methanol (2 %) (26.6 q/ha). Biophysical parameters like transpiration rate were shown maximum in Triacontanol and minimum diffusive resistance was seen in same treatment. Whereas, among the stressed plot Relative Water Content (RWC) was found more in Triacontanol followed by KCl (76.6%). At 45 DAS, Finally yield deciding parameter in photosynthetic rate was showed significant differences between the treatments. Photosynthetic rate (31.87µ mol CO2 m-2 s-1) was higher in unstressed plot wherein continuous irrigation without stress. Among the different stress mitigating compounds foliar application of Triacontanol has recorded significantly higher photosynthetic rate (30.13µ mol CO2 m-2 s-1) followed by Nitrobenzene (30.03µ mol CO2 m-2 s-1) Methanol (28.33 µ mol CO2 m-2 s-1) Salicylic acid, Kaoline and lower in stressed plots. Finally the yield components No. of Pods plant-1, Pod weight (g), pod yield (q ha-1) and harvest Index(%) were studied and maximum yield was recorded in the foliar spray of Triacontanol (28.3 q ha-1) followed by KCl (26.9q ha-1) and Methanol (6%) (26.6 q ha-1).
Key words: Diffusive resistance, Groundnut, Kaoline, Pod yield, RWC. Stress mitigation, Photosynthetic rate and Transpiration rate.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Harish, M. and Patil, R.P., Influence of Stress Mitigating Compounds on Biophysical Parameters & Yield and Yield Attributes under Drought Conditions in Groundnut (Arachis hypogea L.), Int. J. Pure App. Biosci.5(4): 1289-1294 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5576
