Abstract
Pasture and grain crop intercropping is considered an alternative for increasing biomass production during the winter periods in Brazil for the establishment of no-tillage systems. We studied nitrogen (N) fertilization rates in a corn-palisadegrass intercropping system that would allow both corn and biomass production without a reduction in corn yield. A field trial was carried out in So Desidrio, Bahia -Brazil using a complete block experimental design with a 5 x 2 factorial layout with two factors: N rate (control, 50, 100, 150, and 200 kg ha -1 N) and two cropping systems (corn with or without palisadegrass). Both corn and palisadegrass were sown simultaneously with N fertilizer applied at sowing. The measurements included corn biomass, grain yield and N uptake. In addition, palisadegrass biomass was assessed at corn harvest and at three consecutive times during the winter. There was an interaction between N rates and the intercropping system. Grain yield was affected by intercropping when N fertilizer rates were lower than 100 kg ha -1 , but above that rate, corn grain yield reached 10,000 kg ha -1 and was similar with or without palisadegrass. Nitrogen fertilizers also positively affected corn N uptake. There was no residual effect of N fertilization on palisadegrass biomass production during the sampling periods. However, the biomass of the palisadegrass increased during the winter period and reached 5,000 kg ha -1 of dry matter by the following season. There was no corn yield reduction when corn was intercropped with palisadegrass using nitrogen rates above 100 kg ha -1 . In addition, it is possible to increase biomass production for the establishment of no-tillage systems in Brazil.
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Claims 7
Claim · model-written summary
Nitrogen rate interacted with cropping system.
Not reportedDirection
Verbatim
t0“corn-palisadegrass”
e0“There was an interaction between N rates and the intercropping system”
Claim · model-written summary
Intercropping affected corn grain yield below 100 kg ha -1 N.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- intercroppinge0
- Outcome
- Grain yielde0
- Qualifier
- lower than 100 kg ha -1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“corn-palisadegrass”
e0“Grain yield was affected by intercropping when N fertilizer rates were lower than 100 kg ha -1”
Claim · model-written summary
Above 100 kg ha -1 N, corn yield reached 10,000 kg ha -1 and was similar with or without palisadegrass.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- intercropped with palisadegrasse1
- Interactor
- palisadegrass
Urochloa brizanthae1weed - Outcome
- corn grain yielde0
- Direction
- similare0
- Value
- 10,000 kg ha -1e0
- Qualifier
- above 100 kg ha -1e1
- Comparator
- without palisadegrasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“above that rate, corn grain yield reached 10,000 kg ha -1 and was similar with or without palisadegrass”
e1“when corn was intercropped with palisadegrass using nitrogen rates above 100 kg ha -1”
Claim · model-written summary
Nitrogen fertilizer positively affected corn nitrogen uptake.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Nitrogen fertilizerse0
- Outcome
- corn N uptakee0
- Direction
- positively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilizers also positively affected corn N uptake”
Claim · model-written summary
Nitrogen fertilization had no residual effect on palisadegrass biomass.
- Taxon
- palisadegrassUrochloa brizanthae0
- Treatment
- N fertilizatione0
- Outcome
- palisadegrass biomass productione0
- Direction
- no residual effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no residual effect of N fertilization on palisadegrass biomass production during the sampling periods”
Claim · model-written summary
Palisadegrass biomass increased over winter to 5,000 kg ha -1 dry matter.
- Taxon
- palisadegrassUrochloa brizanthae0
- Outcome
- biomass of the palisadegrasse0
- Direction
- increasede0
- Value
- 5,000 kg ha -1 of dry mattere0
- Qualifier
- during the winter periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the biomass of the palisadegrass increased during the winter period and reached 5,000 kg ha -1 of dry matter by the following season”
Claim · model-written summary
The authors conclude that biomass production can increase for no-tillage establishment.
Not reportedTaxon
Verbatim
e0“it is possible to increase biomass production for the establishment of no-tillage systems in Brazil”
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