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RESPONSE OF SUNFLOWER (Helianthus annuus L.) TO VARYING PLANTING GEOMETRY AND FERTILIZER LEVELS UNDER DIFFERENT LAND CONFIGURATIONS

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Title RESPONSE OF SUNFLOWER (Helianthus annuus L.) TO VARYING PLANTING GEOMETRY AND FERTILIZER LEVELS UNDER DIFFERENT LAND CONFIGURATIONS
 
Creator BYOMKESH LET
 
Contributor BHANU REKHA, K
 
Subject RESPONSE, SUNFLOWER, VARYING, PLANTING, GEOMETRY, FERTILIZER, LEVELS, LAND, CONFIGURATIONS
 
Description A field experiment entitled “Response of sunflower (Helianthus annuus L.) to
varying planting geometry and fertilizer levels under different land configurations” was
conducted during Kharif 2013 at College Farm, College of Agriculture, Rajendranagar,
Acharya N. G. Ranga Agricultural University, Hyderabad Southern Telangana climatic
Zone of Andhra Pradesh. The soil of experimental site was sandy clay with pH of 7.54,
electrical conductivity 0.32 dSm-1, low in organic carbon (0.36 %), low in available
nitrogen (267 kg ha-1), phosphorus (31 kg ha-1) and high in potassium (352 kg ha-1). The
experiment was laid out in split plot design consisting of twelve treatments (Four main
and three sub treatments) and replicated thrice. M1- Flat bed sowing at 60 cm x 30 cm,
M2- Ridge and furrow sowing at 60 cm x 30 cm, M3- Flat bed with paired row sowing at
45 cm x 40 cm (90/40 cm) and M4- Broad bed and furrow with paired row sowing at 45
cm x 40cm (90/40cm) were the main plot treatments and S1- 75 % RDF, S2- 100 %
RDF(60:60:30 N, P2O5 and K2O kg ha-1) and S3-125% RDF were the sub plot
treatments. Sunflower hybrid (DRSH-1) was sown on 9th July 2013 and harvested on
18th October, 2013.
The results revealed that the growth parameters, yield attributes, yield and
quality parameters of sunflower were not significantly influenced by planting geometry
and land configurations. Graded level of fertilizers had significantly influenced growth
parameters, yield attributes and yield of sunflower.
Among the fertilizer levels, 125 % RDF recorded significantly higher growth
parameters, yield attributes, yield, quality parameters and nutrient uptake over 75 %
RDF but 125% RDF was comparable with 100% RDF. Significantly higher plant
height, leaf area index, dry matter accumulation, stem girth, SPAD chlorophyll meter
readings, head diameter, number of filled seeds head-1 , seed yield plant-1 and lower
number of unfilled seeds head-1 were recorded with 125 % RDF over 75 % RDF.
However 125 % RDF was comparable with 100 % RDF. The interaction effect on yield
attributes was found to be non significant. Thousand seed weight was not significantly
influenced by different treatments and due to their interaction.
Seed, stalk yield and harvest index did not vary significantly among different
planting geometry and land configuration treatments. Among the fertilizer levels,
application of 125% RDF registered significantly higher seed (2221 kg ha-1), stalk yield
(3889 kg ha-1) and harvest index (36%) over 75% RDF but it was comparable with
100% RDF that recorded seed, stalk yield and harvest index of 2080, 3748 kg ha-1 and
36 % respectively. The interaction effect on yield and harvest index was found to be non
significant.
Quality parameters viz; oil and protein yield were not significantly influenced by
different planting geometry and land configuration treatments. Among the graded level
of fertilizers application of 125 % RDF recorded higher oil and protein yield over 75 %
RDF and 125 % RDF was comparable with 100 % RDF. Further nutrient uptake (N, P
and K) uptake was also higher with the same treatments. The interaction effect was
found to be non significant on quality parameters and nutrient uptake.
Post harvest soil properties (pH, Ec and OC) and available soil nutrient status
did not vary significantly due to different planting geometry and fertilizer levels and
interaction. Higher post harvest soil available nitrogen, phosphorus and potassium status
was recorded with 125% RDF. While, the lowest values were with application of 75%
RDF.
Gross returns ( 79701 ha-1), net returns ( 56549 ha-1) and B: C ratio (2.8) were
highest with flat bed and paired row sowing at 45 cm x 40 cm (90/40 cm) applied with
125% RDF.
Planting geometry and land configurations could not exert significant influence
on growth parameters (except dry matter accumulation in capitulum at harvest), yield
attributes (except filled seeds head-1 and yield plant-1), yield, quality parameters and
nutrient uptake of sunflower.
Among the different fertilizer treatments 125% RDF recorded higher plant
height, leaf area index, dry matter accumulation, stem girth, SPAD chlorophyll meter
readings and stem girth over 75 % RDF but was comparable with 100 % RDF.
Yield attributes viz., head diameter, number of filled seeds head-1, seed yield
plant-1, yield (seed and stalk), quality parameters, nutrient content and nutrient uptake
(NPK) were significantly higher with the application of 125% RDF but it is on par with
100% RDF.
From the present investigation it can be concluded that flat bed and paired row
sowing at 45 cm x 40 cm (90/40 cm) and application of 125% RDF to sunflower crop
was ideal for realizing higher seed yield and economic returns
 
Date 2016-09-12T10:31:05Z
2016-09-12T10:31:05Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76404
 
Language en
 
Relation D9682;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD