Effect of organic and inorganic sources of nitrogen with different irrigation schedules on growth and yield of sunflower (Helianthus annuus)
DOI:
https://doi.org/10.59797/ija.v52i1.4896Keywords:
Sunflower, Irrigation, FYM, Yield, Water-use efficiency, Uptake, EconomicsAbstract
A field experiment was conducted during 2001 and 2002 to study the combined effect of organic and inor- ganic sources of nitrogen (N) with different irrigation schedules on growth and yield of sunflower (Helianthus annuus L.). There were three irrigation schedules (IW:CPE ratios 0.6, 0.8 and 1 .O) and five N-management prac- tices (the control, recommended dose of N through fertilizer, substitution of 25, 50 and 100 per cent recom- mended dose of N through FYM). Irrigation schedule at irrigation water (IW): cumulative pan evaporation (CPE) ratio 1.0 significantly improved the growth, yield, N uptake and net returns of sunflower. The supply of entire dose of N through fertilizer gave significantly higher values of all the parameters, which were on a par with those un- der 75 per cent N through fertilizer + 25 per cent N through FYM.The interaction of IW:CPE ratio 1.0 in combina- tion with supply of entire dose of N through fertilizer resulted in better growth and yield.References
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