Open AccessEffect of deficit irrigation on yield and water productivity of sunflower in East and South-eastern coastal plains of Odisha
Author(s) -
Pradip Kumar Sahu,
A.P. Sahu,
P. S. Brahmanand,
B. Panigrahi,
Debesh Das,
B. Sahoo,
Dillip Kumar Swain
Publication year - 2021
Publication title -
journal of environmental biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.247
H-Index - 48
eISSN - 2394-0379
pISSN - 0254-8704
DOI - 10.22438/jeb/42/4/mrn-1428
Subject(s) - irrigation , sunflower , loam , agronomy , deficit irrigation , productivity , sowing , environmental science , yield (engineering) , water use efficiency , mathematics , irrigation management , soil water , biology , economics , materials science , macroeconomics , soil science , metallurgy
Aim: To study the effect of deficit irrigation on yield and water productivity of sunflower in East and South eastern coastal plains of Odisha. Methodology: The present study on water productivity was undertaken using hybrid sunflower (Swathi: NSFH-145) with application of deficit irrigation having Management Allowable Deficit level of 20%, 40%, 60% and one farmers’ practice of 70% MAD level of irrigation. Growth attributes like leaf area Index, plant height, and head diameter were recorded at 20, 45, 65 and 80 days after sowing. Yield attributes like 1000 seed weight (test weight), above ground biomass and grain yield, were recorded after threshing. Results: The growth, yield and water productivity of sunflower were significantly influenced by different irrigation levels. Irrigation scheduling at 20% MAD level showed the highest grain yield, while the lowest yield was obtained from the farmers’ practice. Irrigation at 60% MAD level showed the highest water productivity when compared with farmer’s practice as it produced the highest yield per unit quantity of water application of 0.85 kg m-3 and also produced the highest average benefit to cost ratio of 2.08.Interpretation: Taking the yield, water productivity and benefit-cost ratio into account, irrigation at 60% MAD level was found to be the best. However, irrigation at 50% to 60% MAD level may be suggested for growing sunflower under water scarce conditions in sandy loam soil for increasing water productivity.