NUTRIENT MANAGEMENT IN RABI SUNFLOWER (Helianthus annuus.L) IN RELATIONTO DIFFERENT TILLAGE PRACTICES IMPOSED DURING KHARIF.

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dc.contributor.advisorYAKADRI, M
dc.contributor.authorSRIDHAR, K
dc.date.accessioned2016-06-09T14:04:02Z
dc.date.available2016-06-09T14:04:02Z
dc.date.issued2011
dc.description.abstractA field experiment entitled “Nutrient management in Rabi Sunflower (Helianthus annuus. L) in relation to different tillage practices imposed during Kharif” was conducted at Research farm, RARS, Bijapur on a clayey soil with strongly alkaline in reaction, low in organic carbon, nitrogen and phosphorus & medium in potassium during rabi season of 2011 with an objective to study the effect of different tillage practices and nitrogen sources on sunflower growth, yield and economics. The treatments consist of three tillage practices (Conventional tillage (T1), Reduced tillage (T2) and Minimum tillage (T3) as main plots and five nutrient management practices (N1- In-situ Sunnhemp green manure incorporation @ 5 t ha -1 , N2- In- situ Sunnhemp green manure incorporation @ 2.5 t ha -1 + 50% RDN through urea, N3-100% RDF through fertilizer(35:50:35 N: P2O5: K2O kg ha -1) , N4- Farmer’s practice (24:30:0 N:P2O5:K2O kg ha -1) and N5- Farmer’s practice + In situ Sunnhemp green manure incorporation @ 2.5 t ha -1) as sub plots. The experiment was laid out in split plot design and replicated thrice. The results of the experiment revealed that tillage practices had no significant effect on growth and yield of sunflower crop. Interaction effect due to tillage and nutrient management was also non significant except for dry matter at 20DAS. Among the three tillage practices, dry matter production only during the initial stages was significantly higher with reduced tillage (T2) over conventional (T1) and minimum tillage (T3). The yield attributes viz., number of seeds per head and seed weight per head was significantly higher with minimum tillage (T3) while tillage practices did not have significant influence on rest of the yield attributes, seed yield and stalk yield. Sunflower fertilized with 100% RDF through fertilizer (N3) recorded significantly higher germination percentage, plant height, number of leaves, LAI and dry matter production over rest of the treatments while being on par with N2(In- situ Sunnhemp green manure incorporation @ 2.5 t ha -1 + 50% RDN through fertilizer) in most of the parameters mentioned above. Head diameter was significantly higher with 100% RDF through fertilizer (N3) but on par with N2 and N1 and number of seeds per head was higher with 100% RDF through fertilizer (N3), but on par with N2. While test weight was higher with 100% RDF through fertilizer (N3) but on par with N1(In -situ Sunnhemp green manure incorporation @ 5 t biomass ha -1) and N2(In- situ Sunnhemp green manure incorporation @ 2.5 t ha -1 + 50% RDF through fertilizer). Seed and stalk yield of sunflower were significantly higher with 100% RDF through fertilizer (N3) over N4- Farmers’ practice (24:30:0 N:P2O5:K2O kg ha -1) but was on par with rest of the treatments. NPK content in plant and NPK uptake by sunflower were higher with 100% RDF through fertilizer (N3). Maximum gross returns (38061Rs ha-1), net returns (28729Rs ha-1) and benefit-cost ratio (3.08) were recorded with minimum tillage along with 100% RDF through fertilizer (T3N3). Interaction effect on growth and yield attributes was not significant. From the present investigation, it is inferred that sunflower cultivation is successful with minimum tillage of one harrowing followed by one herbicide (Pendimethalin @ 1 kg a.i ha -1) spray after sowing with 100% RDF through fertilizer during rabi season in northern dry zone of Karnataka (Bijapur). A few more years of field testing is however necessary before making it a general recommendation for similar agro-climatic conditions of Bijapur.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/67123
dc.language.isoenen_US
dc.publisherACHARYA N.G.RANGA AGRICULTURAL UNIVERISTYen_US
dc.relation.ispartofseriesD9100;
dc.subAgronomy
dc.subjecttillage, nutrients, sowing, diseases, nutrient management, organic fertilizers, fertilizers, yields, developmental stages, nitrogenen_US
dc.these.typeM.Sc
dc.titleNUTRIENT MANAGEMENT IN RABI SUNFLOWER (Helianthus annuus.L) IN RELATIONTO DIFFERENT TILLAGE PRACTICES IMPOSED DURING KHARIF.en_US
dc.typeThesisen_US
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