Abstract
A field experiment was conducted on Ver tisols of Dharwad, Karnataka during the rainy seasons of 2007 and 2008, to ascertain the nutrient requirement of Bt cotton ( Gossypium hirsutum L.) with the recommended dose of fertilizer (RDF, 1206060 kg N P O K O/ha) advocated to the conventional non-Bt cotton hybrid. The investiga- 2 5 2 tion focused on varying the recommended nitrogen application levels into 7 splits10% as basal, remaining 90% in equal splits at 30, 60, 75, 90, 105 and 120 days after sowing (DAS)with entire dose of P and K coupled with the soil application of MgSO @ 25 kg/ha, foliar nutrition of urea (2%), DAP (2%), MgSO (1%), KNO (2%), calcium 4 4 3 nitrate (1%), multimicronutrient (1%), Cytokinin (2 ppm) and polyethylene mulching (100 micron thickness). Bunny Bt (NCS 145) cotton genotype was sown with 90 cm 60 cm spacing. Foliar application of KNO 2%, soil 3 and foliar application of MgSO @ 25 kg/ha and 1% respectively, and soil application of MgSO @ 25 kg/ha alone 4 4 increased the seed-cotton yield by 25.0, 24.4 and 24.3% respectively, over the RDF. Sympodial branches and total number of bolls/plant followed the similar trend. At 120 DAS, increase in leaf potash content (1.02%) was recorded with foliar application of 2% KNO and the increase in leaf magnesium (1.86%) was noticed with soil and foliar ap- 3 plication of MgSO @ 25 kg/ha and 1% respectively. Significantly increased 2.5% span length (33.1 mm) and 4 bundle strength (24.8 g/tex) were observed with foliar application of KNO (2%) over the other treatments. Foliar 3 application of KNO (2%) (3 sprays on 15 October, 1 November and 31 November) significantly increased the 3 seed-cotton yield (2.54 t/ha), gross returns ( 56.2 103/ha), net returns ( 27.8 103/ha) and benefit: cost ratio (1.98).
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Claims 8
Claim · model-written summary
Foliar KNO3 at 2% increased seed-cotton yield by 25.0% over the recommended dose of fertilizer.
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e2“Foliar application of KNO 2%”
e3“increased the seed-cotton yield by 25.0, 24.4 and 24.3% respectively, over the RDF”
e4“Bunny Bt (NCS 145) cotton genotype”
Claim · model-written summary
Soil plus foliar MgSO4 at 25 kg/ha and 1% increased seed-cotton yield by 24.4% over the recommended dose of fertilizer.
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e3“increased the seed-cotton yield by 25.0, 24.4 and 24.3% respectively, over the RDF”
e5“foliar application of MgSO @ 25 kg/ha and 1% respectively”
Claim · model-written summary
Soil application of MgSO4 at 25 kg/ha alone increased seed-cotton yield by 24.3% over the recommended dose of fertilizer.
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e3“increased the seed-cotton yield by 25.0, 24.4 and 24.3% respectively, over the RDF”
e6“soil application of MgSO @ 25 kg/ha alone”
Claim · model-written summary
Sympodial branches and total number of bolls per plant followed the same trend as seed-cotton yield.
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e2“Sympodial branches and total number of bolls/plant followed the similar trend”
Claim · model-written summary
Foliar application of 2% KNO increased leaf potash content by 1.02% at 120 DAS.
- Taxon
- Bt cottone1
- Treatment
- foliar application of 2% KNOe4
- Outcome
- leaf potash contente4
- Direction
- increasee4
- Value
- 1.02%e4
- Qualifier
- At 120 DASe4
Not reportedComparator
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e4“At 120 DAS, increase in leaf potash content (1.02%) was recorded with foliar application of 2% KNO”
Claim · model-written summary
Soil and foliar MgSO4 at 25 kg/ha and 1% increased leaf magnesium by 1.86%.
- Taxon
- Bt cottone1
- Treatment
- MgSO @ 25 kg/ha and 1%e7
- Outcome
- leaf magnesiume7
- Direction
- increasee7
- Value
- 1.86%e7
Not reportedComparator
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e7“the increase in leaf magnesium (1.86%) was noticed with soil and foliar ap- 3 plication of MgSO @ 25 kg/ha and 1% respectively”
Claim · model-written summary
Foliar KNO3 at 2% significantly increased fibre span length by 2.5% (33.1 mm) relative to the other treatments.
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e5“Significantly increased 2.5% span length (33.1 mm) and 4 bundle strength (24.8 g/tex) were observed with foliar application of KNO (2%) over the other treatments”
Claim · model-written summary
Foliar KNO3 at 2% significantly increased bundle strength (24.8 g/tex) relative to the other treatments.
Verbatim
e1“requirement of Bt cotton ( Gossypium hirsutum L.)”
e5“Significantly increased 2.5% span length (33.1 mm) and 4 bundle strength (24.8 g/tex) were observed with foliar application of KNO (2%) over the other treatments”
The same questions in other papers
application · yield · Gossypium hirsutum (cotton)Positive and negative results
252 papers in the same direction as this paper · 27 in the opposite direction · 3 reporting no difference from an alternative
- positive
- positive
- no effect
279 papers more in this group
See all 283 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.