Abstract
A field experiment was conducted during the rainy ( kharif) and winter ( rabi) seasons of 200607 and 200708 at New Delhi, to assess the performance of 3 cotton ( Gossypium hirsutum L.)wheat [ Tr iticum aestivum (L.) emend. Fiori & Paol.] systems as affected by nitrogen (N) fertilization. In cotton, treatments formed by combination of 3 cotton hybrids [2 Bt (MRC 6304 and RCH 317) and 1 non-Bt hybrid (LHH 144)] in main plot and 4 levels of N fertilization (0, 60, 120 and 180 kg/ha) in sub-plots were tested. In succeeding wheat, cotton treatments were further sub-divided to accommodate 3 levels of N fertilization (0, 60, and 120 kg N/ha). Pooled data revealed that 2 Bt cotton hybrids being at par gave 55.4% (2.99 tonnes/ha) higher seed-cotton yield (SCY) than non Bt cotton hybrid (1.93 tonnes/ha) and the cotton hybrids did not markedly alter the performance of succeeding wheat. How- ever, the system productivity (cotton-equivalent yield, CEY) of Bt cottonwheat was 24.2% (4.72 tonnes/ha) higher than the non-Bt cottonwheat system (3.80 tonnes/ha). The per cent contribution of Bt cotton to CEY of system (69.7) far exceeded that of non-Bt cotton (49.6). Both agronomic nitrogen-use efficiency (ANUE) and physiological nitrogen-use efficiency (PNUE) of Bt cotton and ANUE of succeeding wheat were higher than the non-Bt cotton and following wheat. Yield, N uptake of cotton, wheat and system increased with each successive increase of 60 kg N dose from 0 to 180 kg/ha. The N response of cotton was found to be quadratic with optimum dose of 173.0 kg/ha. ANUE and PNUE of cotton were the highest with 60 (5.73) and 120 kg N fertilization (17.05) and decreased thereafter with increasing N dose. Wheat crop responded to direct application of N up to 120 kg/ha. The currently recommended N input (300 kg/ha) of the non-Bt cotton (180 kg/ha)wheat (120 kg/ha) system can be reduced by 27.8 kg with adoption of MRC 6304 Bt cotton.
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Claims 12
Claim · model-written summary
Two Bt cotton hybrids gave 55.4% (2.99 tonnes/ha) higher seed-cotton yield than the non-Bt cotton hybrid.
- Taxon
- cotton
Gossypium hirsutume3 - Treatment
- 2 Bt cotton hybridse3
- Outcome
- seed-cotton yielde3
- Direction
- highere3
- Value
- 55.4% (2.99 tonnes/ha)e3
- Comparator
- non Bt cotton hybride3
- Setting
- New Delhie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“A field experiment was conducted during the rainy ( kharif) and winter ( rabi) seasons of 200607 and 200708 at New Delhi”
e3“2 Bt cotton hybrids being at par gave 55.4% (2.99 tonnes/ha) higher seed-cotton yield (SCY) than non Bt cotton hybrid (1.93 tonnes/ha)”
Claim · model-written summary
Bt cotton-wheat system productivity was 24.2% (4.72 tonnes/ha) higher than the non-Bt cotton-wheat system.
- Taxon
- cottonGossypium hirsutume4
- Treatment
- Bt cottonwheate4
- Outcome
- system productivity (cotton-equivalent yield, CEY)e4
- Direction
- highere4
- Value
- 24.2% (4.72 tonnes/ha)e4
- Comparator
- non-Bt cottonwheat systeme4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the system productivity (cotton-equivalent yield, CEY) of Bt cottonwheat was 24.2% (4.72 tonnes/ha) higher than the non-Bt cottonwheat system (3.80 tonnes/ha)”
Claim · model-written summary
The per cent contribution of Bt cotton to system CEY (69.7) far exceeded that of non-Bt cotton (49.6).
- Taxon
- cottonGossypium hirsutume5
- Treatment
- Bt cottone5
- Outcome
- per cent contribution of Bt cotton to CEY of systeme5
- Direction
- far exceedede5
- Value
- 69.7e5
- Qualifier
- 49.6e5
- Comparator
- non-Bt cottone5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The per cent contribution of Bt cotton to CEY of system (69.7) far exceeded that of non-Bt cotton (49.6)”
Claim · model-written summary
Agronomic and physiological nitrogen-use efficiency of Bt cotton were higher than those of non-Bt cotton.
- Taxon
- cottonGossypium hirsutume6
- Treatment
- Bt cottone6
- Outcome
- agronomic nitrogen-use efficiency (ANUE) and physiological nitrogen-use efficiency (PNUE)e6
- Direction
- highere6
- Comparator
- non-Bt cottone6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Both agronomic nitrogen-use efficiency (ANUE) and physiological nitrogen-use efficiency (PNUE) of Bt cotton and ANUE of succeeding wheat were higher than the non-Bt cotton and following wheat”
Claim · model-written summary
Agronomic nitrogen-use efficiency of the succeeding wheat was higher than that of the following wheat after Bt cotton.
- Taxon
- wheat
Triticum aestivume6 - Treatment
- Bt cottone6
- Outcome
- ANUEe6
- Direction
- highere6
- Comparator
- following wheate6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Both agronomic nitrogen-use efficiency (ANUE) and physiological nitrogen-use efficiency (PNUE) of Bt cotton and ANUE of succeeding wheat were higher than the non-Bt cotton and following wheat”
Claim · model-written summary
Yield and N uptake of cotton, wheat and the system increased with each 60 kg N dose increase from 0 to 180 kg/ha.
- Taxon
- cottonGossypium hirsutume7
- Treatment
- 60 kg N dose from 0 to 180 kg/hae7
- Outcome
- Yield, N uptake of cotton, wheat and systeme7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Yield, N uptake of cotton, wheat and system increased with each successive increase of 60 kg N dose from 0 to 180 kg/ha”
Claim · model-written summary
Cotton yield and N response were quadratic, with an optimum N dose of 173.0 kg/ha.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- optimum dosee0
- Value
- 173.0 kg/hae0
- Qualifier
- quadratice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N response of cotton was found to be quadratic with optimum dose of 173.0 kg/ha”
Claim · model-written summary
ANUE of cotton was highest at 60 kg N fertilization (5.73) and decreased thereafter with increasing N dose.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- N fertilizatione0
- Outcome
- ANUEe0
- Direction
- higheste0
- Value
- 5.73e0
- Qualifier
- decreased thereafter with increasing N dosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ANUE and PNUE of cotton were the highest with 60 (5.73) and 120 kg N fertilization (17.05) and decreased thereafter with increasing N dose”
Claim · model-written summary
PNUE of cotton was highest at 120 kg N fertilization (17.05) and decreased thereafter with increasing N dose.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- N fertilizatione0
- Outcome
- PNUEe0
- Direction
- higheste0
- Value
- 17.05e0
- Qualifier
- decreased thereafter with increasing N dosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ANUE and PNUE of cotton were the highest with 60 (5.73) and 120 kg N fertilization (17.05) and decreased thereafter with increasing N dose”
Claim · model-written summary
Wheat responded to direct N application up to 120 kg/ha.
- Taxon
- WheatTriticum aestivume0
- Outcome
- responded to direct application of Ne0
- Value
- 120 kg/hae0
- Qualifier
- up toe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat crop responded to direct application of N up to 120 kg/ha”
Claim · model-written summary
The N input of the non-Bt cotton-wheat system can be reduced by 27.8 kg with adoption of MRC 6304 Bt cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- adoption of MRC 6304 Bt cottone0
- Outcome
- N inpute0
- Value
- 27.8 kge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The currently recommended N input (300 kg/ha) of the non-Bt cotton (180 kg/ha)wheat (120 kg/ha) system can be reduced by 27.8 kg with adoption of MRC 6304 Bt cotton”
Claim · model-written summary
Cotton hybrids did not markedly alter the performance of succeeding wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- cotton hybridse0
- Outcome
- performance of succeeding wheate0
- Direction
- did not markedly altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cotton hybrids did not markedly alter the performance of succeeding wheat”
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