Abstract
A field experiment was conducted during 2006-08 in a mixed red and black calcareous soil at Coimabtore to study the effect of irrigation levels (protective irrigation and irrigation at 0.6 IW/CPE, 0.8 IW/CPE, 1.0 IW/CPE) and N levels (control, 60 kg N/ha, 90 kg N/ha and 120 kg N/ha) on soil water dynamics, productivity and input-use efficiency of 'RCH 2' Bt cotton (Gossypium hirsutum L.) under winter irrigated situation. It was observed that the seed cotton (1 980-2 160 kg/ha) and lint yield (700-772 kg/ha) under different irrigation treatments were statistically at par with the protective irrigation but increased significantly due to nitrogen application. However there was no significant difference among 60, 90 and 120 kg N/ha with respect to seed cotton and lint yield. There was significant reduction in water-use efficiency of cotton with the increase in the level of irrigation but there was increase in the water-use efficiency due to N application over no nitrogen control. However, there was no significant difference in the water-use efficiency due to 60, 90 and 120 kg N/ha. The partial factor productivity of nitrogen decreased significantly with the increase in irrigation and N levels. Thus, 'RCH2Bt' cotton hybrid may be grown with protective irrigation and 60 kg N/ha to achieve higher water- and nitrogen-use efficiency without significant yield reduction in winter-irrigated situation in the southern zone of the country.
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Claims 10
Claim · model-written summary
Seed cotton yield under the irrigation treatments was statistically at par with protective irrigation.
- Taxon
- Gossypium hirsutum
Gossypium hirsutumt0 - Material
- RCH 2e7
- Treatment
- irrigation at 0.6 IW/CPE, 0.8 IW/CPE, 1.0 IW/CPEe1
- Outcome
- seed cottone2
- Direction
- statistically at pare2
- Value
- 1 980-2 160 kg/hae2
- Comparator
- protective irrigatione1
- Setting
- Coimabtoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e0“A field experiment was conducted during 2006-08 in a mixed red and black calcareous soil at Coimabtore”
e1“irrigation levels (protective irrigation and irrigation at 0.6 IW/CPE, 0.8 IW/CPE, 1.0 IW/CPE) and N levels (control, 60 kg N/ha, 90 kg N/ha and 120 kg N/ha)”
e2“It was observed that the seed cotton (1 980-2 160 kg/ha) and lint yield (700-772 kg/ha) under different irrigation treatments were statistically at par with the protective irrigation but increased significantly due to nitrogen application”
e7“'RCH 2' Bt cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Lint yield under the irrigation treatments was statistically at par with protective irrigation.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- RCH 2e7
- Treatment
- irrigation at 0.6 IW/CPE, 0.8 IW/CPE, 1.0 IW/CPEe1
- Outcome
- lint yielde2
- Direction
- statistically at pare2
- Value
- 700-772 kg/hae2
- Comparator
- protective irrigatione1
- Setting
- Coimabtoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e0“A field experiment was conducted during 2006-08 in a mixed red and black calcareous soil at Coimabtore”
e1“irrigation levels (protective irrigation and irrigation at 0.6 IW/CPE, 0.8 IW/CPE, 1.0 IW/CPE) and N levels (control, 60 kg N/ha, 90 kg N/ha and 120 kg N/ha)”
e2“It was observed that the seed cotton (1 980-2 160 kg/ha) and lint yield (700-772 kg/ha) under different irrigation treatments were statistically at par with the protective irrigation but increased significantly due to nitrogen application”
e7“'RCH 2' Bt cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Seed cotton yield increased significantly with nitrogen application.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- nitrogen applicatione2
- Outcome
- seed cottone2
- Direction
- increased significantlye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e2“It was observed that the seed cotton (1 980-2 160 kg/ha) and lint yield (700-772 kg/ha) under different irrigation treatments were statistically at par with the protective irrigation but increased significantly due to nitrogen application”
Claim · model-written summary
Lint yield increased significantly with nitrogen application.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- nitrogen applicatione2
- Outcome
- lint yielde2
- Direction
- increased significantlye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e2“It was observed that the seed cotton (1 980-2 160 kg/ha) and lint yield (700-772 kg/ha) under different irrigation treatments were statistically at par with the protective irrigation but increased significantly due to nitrogen application”
Claim · model-written summary
Seed cotton and lint yield did not differ significantly among 60, 90 and 120 kg N/ha.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- 60, 90 and 120 kg N/hae3
- Outcome
- seed cotton and lint yielde3
- Direction
- no significant differencee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e3“there was no significant difference among 60, 90 and 120 kg N/ha with respect to seed cotton and lint yield”
Claim · model-written summary
Water-use efficiency of cotton was significantly reduced with increasing irrigation level.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- increase in the level of irrigatione4
- Outcome
- water-use efficiency of cottone4
- Direction
- significant reductione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e4“There was significant reduction in water-use efficiency of cotton with the increase in the level of irrigation”
Claim · model-written summary
Nitrogen application increased water-use efficiency over the no-nitrogen control.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- N applicatione5
- Outcome
- water-use efficiencye5
- Direction
- increasee5
- Comparator
- no nitrogen controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e5“there was increase in the water-use efficiency due to N application over no nitrogen control”
Claim · model-written summary
Water-use efficiency did not differ significantly among 60, 90 and 120 kg N/ha.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- 60, 90 and 120 kg N/hae6
- Outcome
- water-use efficiencye6
- Direction
- no significant differencee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e6“there was no significant difference in the water-use efficiency due to 60, 90 and 120 kg N/ha”
Claim · model-written summary
Partial factor productivity of nitrogen decreased significantly with increasing irrigation and nitrogen levels.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Treatment
- increase in irrigation and N levelse0
- Outcome
- partial factor productivity of nitrogene0
- Direction
- decreased significantlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum)”
e0“The partial factor productivity of nitrogen decreased significantly with the increase in irrigation and N levels”
Claim · model-written summary
The authors recommend growing the RCH2Bt cotton hybrid with protective irrigation and 60 kg N/ha for higher water- and nitrogen-use efficiency without significant yield reduction.
- Taxon
- cottonGossypium hirsutume0
- Material
- RCH2Bte0
- Outcome
- water- and nitrogen-use efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'RCH2Bt' cotton hybrid may be grown with protective irrigation and 60 kg N/ha to achieve higher water- and nitrogen-use efficiency without significant yield reduction in winter-irrigated situation in the southern zone of the country”
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