Abstract
At the All India Coordinated Cotton Improvement Project, MPKV, Rahuri, Dist. Ahmednagar, Maharashtra, India, a field experiment study on the “Impact of canopy management practices on physiological and yield parameters of Bt Cotton (Gossypium hirsutum L) under high-density planting systems (HDPS)” was carried out during the Kharif season of 2022. Two factors, namely spacing viz.,S1 (60x30 cm), S2 (90x30 cm), S3 (120x30 cm) and S4 (120x60 cm) and canopy management practices viz., T1 (Pruning at 40 DAS and topping at 70 DAS), T2 (Pruning at 50 DAS and topping at 80 DAS), T3 (Mepiquat chloride @ 50 ppm at 55 and 75 DAS) and T4 (No pruning and no topping - control), were used to set up the experiment, which was replicated three times. The experiment was conducted using the RCH-659 Bt cotton hybrid seed. With the exception of 30 DAS, where only spacing had a significant effect, the results showed that the spacing and treatment (canopy management practices) at 60 and 90 DAS had a significant impact on physiological parameters, including the chlorophyll index (SPAD), rate of photosynthesis, leaf area index, and specific leaf weight. With treatment T1 (pruning at 40 DAS and topping at 70 DAS) in 60 and 90 DAS, the spacing S4 (120x60 cm) had the significantly greatest chlorophyll index (SPAD), rate of photosynthesis, and specific leaf weight. The maximum leaf area index was recorded by treatment T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S1 (60x30 cm), whereas the lowest leaf area index was obtained at both 60 and 90 DAS by treatment T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S4 (120x60 cm). When treated with T1 (pruning at 40 DAS and topping at 70 DAS) under spacing S4 (120 x 60 cm), the yield parameters, including seed cotton yield plan T1, demonstrated better results. Treatment T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S2 (90 x 30 cm) had the highest seed cotton yield ha-1.
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Claims 7
Claim · model-written summary
Spacing and canopy management had a significant impact on physiological parameters at 60 and 90 DAS.
- Taxon
- Bt cotton (Gossypium hirsutum L)
Gossypium hirsutumt0 - Treatment
- canopy management practicese1
- Outcome
- physiological parameterse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e1“the spacing and treatment (canopy management practices) at 60 and 90 DAS had a significant impact on physiological parameters”
Claim · model-written summary
T1 with spacing S4 had the greatest chlorophyll index, photosynthesis rate and specific leaf weight at 60 and 90 DAS.
- Taxon
- Bt cotton (Gossypium hirsutum L)Gossypium hirsutumt0
- Treatment
- T1 (pruning at 40 DAS and topping at 70 DAS)e2
- Outcome
- chlorophyll index (SPAD), rate of photosynthesis, and specific leaf weighte2
- Direction
- greateste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e2“With treatment T1 (pruning at 40 DAS and topping at 70 DAS) in 60 and 90 DAS, the spacing S4 (120x60 cm) had the significantly greatest chlorophyll index (SPAD), rate of photosynthesis, and specific leaf weight”
Claim · model-written summary
T1 with spacing S1 gave the maximum leaf area index.
- Taxon
- Bt cotton (Gossypium hirsutum L)Gossypium hirsutumt0
- Treatment
- T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S1 (60x30 cm)e3
- Outcome
- leaf area indexe3
- Direction
- maximume3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e3“The maximum leaf area index was recorded by treatment T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S1 (60x30 cm)”
Claim · model-written summary
T1 with spacing S4 gave the lowest leaf area index at 60 and 90 DAS.
- Taxon
- Bt cotton (Gossypium hirsutum L)Gossypium hirsutumt0
- Treatment
- T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S4 (120x60 cm)e4
- Outcome
- leaf area indexe4
- Direction
- loweste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e4“the lowest leaf area index was obtained at both 60 and 90 DAS by treatment T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S4 (120x60 cm)”
Claim · model-written summary
T1 with spacing S4 gave better yield parameters, including seed cotton yield.
- Taxon
- Bt cotton (Gossypium hirsutum L)Gossypium hirsutumt0
- Treatment
- T1 (pruning at 40 DAS and topping at 70 DAS) under spacing S4 (120 x 60 cm)e5
- Outcome
- yield parameterse5
- Direction
- bettere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e5“When treated with T1 (pruning at 40 DAS and topping at 70 DAS) under spacing S4 (120 x 60 cm), the yield parameters, including seed cotton yield plan T1, demonstrated better results”
Claim · model-written summary
T1 with spacing S2 gave the highest seed cotton yield per hectare.
- Taxon
- Bt cotton (Gossypium hirsutum L)Gossypium hirsutumt0
- Treatment
- T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S2 (90 x 30 cm)e6
- Outcome
- seed cotton yield ha-1e6
- Direction
- higheste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e6“Treatment T1 (pruning at 40 DAS and topping at 70 DAS) with spacing S2 (90 x 30 cm) had the highest seed cotton yield ha-1”
Claim · model-written summary
Spacing alone had a significant effect on physiological parameters at 30 DAS.
- Taxon
- Bt cotton (Gossypium hirsutum L)Gossypium hirsutumt0
- Treatment
- spacinge7
- Outcome
- significant effecte7
- Qualifier
- 30 DASe7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Bt cotton (Gossypium hirsutum L)”
e7“With the exception of 30 DAS, where only spacing had a significant effect”
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See all 171 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.