Abstract
The aim of this study was to assess biomass production of pearl millet as a function of levels and phases of defoliation. The experiment was carried out in a protected environment at the Fazenda União experimental farm in the municipality of Nova Xavantina, MT, Brazil, in 8 dm3 capacity pots in soil classified as dystrophic red Latosol. The experimental design used was randomized blocks in a 5 × 3 + 1 factorial arrangement, with five phases of defoliation (three expanded leaves, six expanded leaves, flag leaf, booting, full flowering), three levels of defoliation (33, 66 and 99%), and an additional treatment without defoliation, with three replications. The pearl millet cultivar ADR 300 was used. Plant height, number of tillers, total dry biomass of the seed heads, and total dry biomass of the plants during the leaf rolling phase was assessed. It was observed that plant height at all levels and phases of defoliation was greater than the control. For number of tillers, a reduction was observed in the booting phase and full flowering phase at all levels of defoliation; and three expanded leaves and flag leaf phases for the levels of 66 and 99% defoliation. Total biomass of the panicle at all levels and phases of defoliation was less than the control. For total dry biomass, there was a statistical difference in relation to the control when the plants were subjected to 33% defoliation in the booting phase and full flowering phase, and 66 and 99% defoliation in all the phases. A fall in production of total dry biomass of the plant greater than 53% was observed with total elimination of the leaves during the flag leaf phase. Key words: Leaf area, damage level, Pennisetum glaucum, no-till planting.
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Claims 7
Claim · model-written summary
Plant height was greater than control at every defoliation level and phase.
- Taxon
- pearl millet
Cenchrus americanust0 - Material
- ADR 300t0
- Treatment
- all levels and phases of defoliatione0
- Outcome
- plant heighte0
- Direction
- greatere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height at all levels and phases of defoliation was greater than the control”
t0“pearl millet ADR 300”
Claim · model-written summary
Tillering declined at booting and full flowering under every defoliation level.
- Taxon
- pearl milletCenchrus americanust0
- Material
- ADR 300t0
- Treatment
- all levels of defoliatione0
- Outcome
- number of tillerse0
- Direction
- reductione0
- Qualifier
- booting phase and full flowering phasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For number of tillers, a reduction was observed in the booting phase and full flowering phase at all levels of defoliation”
t0“pearl millet ADR 300”
Claim · model-written summary
Tillering declined at three expanded leaves and flag leaf under 66% and 99% defoliation.
- Taxon
- pearl milletCenchrus americanust0
- Material
- ADR 300t0
- Treatment
- 66 and 99% defoliatione0
- Outcome
- number of tillerse0
- Direction
- reductione0
- Qualifier
- three expanded leaves and flag leaf phasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For number of tillers, a reduction was observed in the booting phase and full flowering phase at all levels of defoliation; and three expanded leaves and flag leaf phases for the levels of 66 and 99% defoliation”
t0“pearl millet ADR 300”
Claim · model-written summary
Panicle biomass was below control at every level and phase of defoliation.
- Taxon
- pearl milletCenchrus americanust0
- Material
- ADR 300t0
- Treatment
- all levels and phases of defoliatione0
- Outcome
- Total biomass of the paniclee0
- Direction
- lesse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total biomass of the panicle at all levels and phases of defoliation was less than the control”
t0“pearl millet ADR 300”
Claim · model-written summary
Total dry biomass differed statistically from control under 33% defoliation at booting and flowering.
- Taxon
- pearl milletCenchrus americanust0
- Material
- ADR 300t0
- Treatment
- 33% defoliatione0
- Outcome
- total dry biomasse0
- Qualifier
- booting phase and full flowering phasee0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For total dry biomass, there was a statistical difference in relation to the control when the plants were subjected to 33% defoliation in the booting phase and full flowering phase”
t0“pearl millet ADR 300”
Claim · model-written summary
Total dry biomass differed statistically from control under 66% and 99% defoliation at all phases.
- Taxon
- pearl milletCenchrus americanust0
- Material
- ADR 300t0
- Treatment
- 66 and 99% defoliatione0
- Outcome
- total dry biomasse0
- Qualifier
- all the phasese0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For total dry biomass, there was a statistical difference in relation to the control when the plants were subjected to 33% defoliation in the booting phase and full flowering phase, and 66 and 99% defoliation in all the phases”
t0“pearl millet ADR 300”
Claim · model-written summary
Removing all leaves at flag leaf cut total plant dry biomass production by more than 53%.
- Taxon
- pearl milletCenchrus americanust0
- Material
- ADR 300t0
- Treatment
- total elimination of the leavese0
- Outcome
- production of total dry biomass of the plante0
- Direction
- falle0
- Value
- greater than 53%e0
- Qualifier
- flag leaf phasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fall in production of total dry biomass of the plant greater than 53% was observed with total elimination of the leaves during the flag leaf phase”
t0“pearl millet ADR 300”
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