Abstract
Aims: To determine the optimum irrigation schedule and nitrogen level for Bt cotton in alfisols in Southern Telangana. Study Design: Split plot design. Place and Duration of Study: ARI, Rajendranagar, Hyderabad during kharif 2014. Methodology: The experiment was laid out with three irrigation schedules (I1- 0.8 IW/CPE, I2 - 0.4 IW/CPE and I3 - Rainfed) as main plots and four nitrogen levels (N1- 0 kg ha-1, N2 - 75 kg ha-1, N3 - 150 kg ha-1 and N4 - 225 kg ha-1) as sub plot treatments replicated thrice. Treatments imposed as per the schedule and data recorded on yield, yield attributes, nitrogen uptake by adopting standard procedures Results: Irrigation at 0.8 IW/CPE recorded significantly higher plant height (79 cm), drymatter at first picking (195 g plant-1), bolls plant-1 (16), seed cotton yield (1435 kg ha-1), lint yield (541 kg ha-1), stalk yield (2057 kg ha-1) and nitrogen uptake (63 kg ha-1) and was not differed significantly with 0.4 IW/CPE and these were significantly superior to rainfed cotton. Among nitrogen levels, significantly higher plant height (90 cm), drymatter at first picking (214 g plant-1) stage, days to reach boll development (90) stage, bolls plant-1 (15), boll weight (5.3 g), seed index (9.9 g), seed cotton yield (1435 kg ha-1), lint yield (547 kg ha -1) and stalk yield (2214 kg ha -1) were found with application of nitrogen at 225 kg ha-1 was comparable with 150 kg N ha-1 and were significantly superior over lower levels of nitrogen application. The substantial increase in yield and yield attributes might be due to favorable effect on growth attributes like plant height, increased bolls plant-1, drymatter accumulation plant-1 and its subsequent translocation towards sink improved the seed cotton yield. Conclusion: It can be concluded that, higher seed cotton yield can be obtained with the irrigation scheduled at 0.4 IW/CPE and application of nitrogen at 150 kg ha-1 in Bt cotton grown in alfisols.
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Claims 20
Claim · model-written summary
Irrigation at 0.8 IW/CPE increased plant height, dry matter and bolls relative to rainfed cotton.
Verbatim
e0“Irrigation at 0.8 IW/CPE recorded significantly higher plant height (79 cm), drymatter at first picking (195 g plant-1), bolls plant-1 (16)”
e1“these were significantly superior to rainfed cotton”
t0“Bt Cotton”
Claim · model-written summary
At 0.8 IW/CPE, cotton dry matter at first picking reached 195 g per plant.
- Taxon
- Bt Cottont0
- Treatment
- Irrigation at 0.8 IW/CPEe0
- Outcome
- drymatter at first pickinge0
- Direction
- highere0
- Value
- 195 g plant-1e0
Not reportedComparator
Verbatim
e0“Irrigation at 0.8 IW/CPE recorded significantly higher plant height (79 cm), drymatter at first picking (195 g plant-1), bolls plant-1 (16)”
t0“Bt Cotton”
Claim · model-written summary
At 0.8 IW/CPE, bolls per plant reached 16.
Not reportedComparator
Verbatim
e0“Irrigation at 0.8 IW/CPE recorded significantly higher plant height (79 cm), drymatter at first picking (195 g plant-1), bolls plant-1 (16)”
t0“Bt Cotton”
Claim · model-written summary
At 0.8 IW/CPE, seed cotton yield reached 1435 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- Irrigation at 0.8 IW/CPEe1
- Outcome
- seed cotton yielde0
- Direction
- highere1
- Value
- 1435 kg ha-1e0
Not reportedComparator
Verbatim
e0“seed cotton yield (1435 kg ha-1), lint yield (541 kg ha-1), stalk yield (2057 kg ha-1) and nitrogen uptake (63 kg ha-1)”
e1“Irrigation at 0.8 IW/CPE recorded significantly higher”
t0“Bt Cotton”
Claim · model-written summary
At 0.8 IW/CPE, lint yield reached 541 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- Irrigation at 0.8 IW/CPEe1
- Outcome
- lint yielde0
- Direction
- highere1
- Value
- 541 kg ha-1e0
Not reportedComparator
Verbatim
e0“lint yield (541 kg ha-1)”
e1“Irrigation at 0.8 IW/CPE recorded significantly higher”
t0“Bt Cotton”
Claim · model-written summary
At 0.8 IW/CPE, stalk yield reached 2057 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- Irrigation at 0.8 IW/CPEe1
- Outcome
- stalk yielde0
- Direction
- highere1
- Value
- 2057 kg ha-1e0
Not reportedComparator
Verbatim
e0“stalk yield (2057 kg ha-1)”
e1“Irrigation at 0.8 IW/CPE recorded significantly higher”
t0“Bt Cotton”
Claim · model-written summary
At 0.8 IW/CPE, nitrogen uptake reached 63 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- Irrigation at 0.8 IW/CPEe1
- Outcome
- nitrogen uptakee0
- Direction
- highere1
- Value
- 63 kg ha-1e0
Not reportedComparator
Verbatim
e0“nitrogen uptake (63 kg ha-1)”
e1“Irrigation at 0.8 IW/CPE recorded significantly higher”
t0“Bt Cotton”
Claim · model-written summary
The 0.8 and 0.4 IW/CPE irrigation schedules did not differ significantly.
Verbatim
e0“was not differed significantly with 0.4 IW/CPE”
e1“Irrigation at 0.8 IW/CPE”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave 90 cm plant height.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- plant heighte0
- Direction
- highere0
- Value
- 90 cme0
Not reportedComparator
Verbatim
e0“significantly higher plant height (90 cm)”
e1“application of nitrogen at 225 kg ha-1”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave 214 g dry matter per plant.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- drymatter at first pickinge0
- Direction
- highere2
- Value
- 214 g plant-1e0
Not reportedComparator
Verbatim
e0“drymatter at first picking (214 g plant-1)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave 90 days to boll development.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- days to reach boll developmente0
- Value
- 90e0
Not reportedComparatorDirection
Verbatim
e0“days to reach boll development (90) stage”
e1“application of nitrogen at 225 kg ha-1”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave 15 bolls per plant.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- bolls plant-1e0
- Direction
- highere2
- Value
- 15e0
Not reportedComparator
Verbatim
e0“bolls plant-1 (15)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave boll weight of 5.3 g.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- boll weighte0
- Direction
- highere2
- Value
- 5.3 ge0
Not reportedComparator
Verbatim
e0“boll weight (5.3 g)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave seed index of 9.9 g.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- seed indexe0
- Direction
- highere2
- Value
- 9.9 ge0
Not reportedComparator
Verbatim
e0“seed index (9.9 g)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave seed cotton yield of 1435 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- seed cotton yielde0
- Direction
- highere2
- Value
- 1435 kg ha-1e0
Not reportedComparator
Verbatim
e0“seed cotton yield (1435 kg ha-1), lint yield (547 kg ha -1)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave lint yield of 547 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- lint yielde0
- Direction
- highere2
- Value
- 547 kg ha -1e0
Not reportedComparator
Verbatim
e0“lint yield (547 kg ha -1)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
Nitrogen at 225 kg per hectare gave stalk yield of 2214 kg per hectare.
- Taxon
- Bt Cottont0
- Treatment
- application of nitrogen at 225 kg ha-1e1
- Outcome
- stalk yielde0
- Direction
- highere2
- Value
- 2214 kg ha -1e0
Not reportedComparator
Verbatim
e0“stalk yield (2214 kg ha -1)”
e1“application of nitrogen at 225 kg ha-1”
e2“Among nitrogen levels, significantly higher plant height”
t0“Bt Cotton”
Claim · model-written summary
The 225 kg nitrogen rate was comparable to 150 kg nitrogen and above lower rates.
Verbatim
e0“application of nitrogen at 225 kg ha-1 was comparable with 150 kg N ha-1 and were significantly superior over lower levels of nitrogen application”
t0“Bt Cotton”
Claim · model-written summary
The authors attributed yield gains to growth and assimilate transfer to bolls.
Verbatim
e0“The substantial increase in yield and yield attributes might be due to favorable effect on growth attributes like plant height, increased bolls plant-1, drymatter accumulation plant-1 and its subsequent translocation towards sink improved the seed cotton yield”
t0“Bt Cotton”
Claim · model-written summary
The authors recommend 0.4 IW/CPE irrigation with 150 kg nitrogen for higher seed cotton yield.
Verbatim
e0“higher seed cotton yield can be obtained with the irrigation scheduled at 0.4 IW/CPE and application of nitrogen at 150 kg ha-1 in Bt cotton grown in alfisols”
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