National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment on rainfed sunflower was conducted during Kharif 2014 at College farm, College of Agriculture, Rajendranagar, Hyderabad to study the effect of humic acid under nutrient management practices on seed yield, oil yield, protein yield, volume weight and hull content of rainfed sunflower. The experiment was laid out in split plot design with eighteen treatments (six main and three sub treatments and replicated thrice). The six main treatments consisted of (M1) - Absolute control, M2 - compost @ 2.5 t ha-1, M3 - compost @ 5.0 t ha-1, M4 - RDF alone (60-60-30 kg N, P2O5 and K2O) M5 - RDF + compost @ 2.5 t ha-1, and M6 - RDF + compost @ 5.0 t ha-1 and the three sub plot treatments consisted of application of varying levels of humic acid granules (basal) viz., S1 - 5.0 kg ha-1, S2 - 10.0 kg ha-1 and S3 - 15.0 kg ha-1. The crop was grown completely under rainfed conditions. During the crop growth period (July 9th to October 9th) a total of 329.7 mm rainfall was received in 24 rainy days and it was deficit by 57.14% over the decennial average of 519.1 mm received in 30 rainy days. A total of 11 dry spells occurred during crop growth period coinciding with the vegetative (5) and reproductive stages (6). The results revealed that among all the nutrient management practices maximum seed, oil and protein yield (1859, 741 and 224 kg ha-1 respectively) were recorded with the combined application of RDF (60-60-30 N, P2O5 and K2O kg ha-1) + compost @ 5 t ha-1 and the lowest oil yield, protein yield and seed yield were observed under absolute control. The effect of varying levels of humic acid and interaction effect was found to be non-significant on oil yield, protein yield and seed yield.
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