Abstract
Objective of this work was to carry out a phytosociological study of weeds in areas cultivated with sweet pepperin no-tillage and conventional planting systems at Universidade Federal Rural do Semi-Arido (UFERSA). For each plating system, 60 days after transplanting, 32 samples were collected with a 0.50 m side square hollow, where the weeds were collected at ground level, separated by species, counted and taken to the greenhouse, until constant mass, for determination of dry matter mass. Based on these values, the following characteristics were determined: density, frequency, abundance, relative density, relative frequency, relative abundance, relative dry mass and index of relative importance value.18 species and 13 botanical families of weed were identified, being Poaceae family the most representative, followed by Amaranthaceae family. All tested species were present in the CPS, which had a density of 466.5 plants m-2. In the no-tillage planting system, 13 species with density of 79.12 plants m-2 occurred, being Phyllanthus tenellus and Commelina benghalensis the species with higher density. With respect to relative dry mass, Croton lobatus species stand out from the others, despite lower density, and the highes index of relative importance value was found for the species Lobatos croton, Phyllanthus tenellus and Commelina benghalensis with 14.13%, 14.02 % and 12.35%, respectively. It is possible to conclude that the no-tillage system changed the dynamics of the weed community, reducing the total density of the weed by 83.04% if compared to conventional plating system.
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Claims 10
Claim · model-written summary
The survey identified 18 weed species in 13 families.
- Taxon
- sweet pepper
Capsicum annuumt0 - Outcome
- weede0
- Value
- 18 species and 13 botanical familiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“18 species and 13 botanical families of weed were identified”
t0“sweet pepper”
Claim · model-written summary
Poaceae was the most represented weed family, followed by Amaranthaceae.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- Poaceae family the most representative, followed by Amaranthaceae familye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Poaceae family the most representative, followed by Amaranthaceae family”
t0“sweet pepper”
Claim · model-written summary
Conventional planting contained all tested species and 466.5 weed plants per square metre.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- densitye0
- Value
- 466.5 plants m-2e0
- Setting
- CPSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All tested species were present in the CPS, which had a density of 466.5 plants m-2”
t0“sweet pepper”
Claim · model-written summary
No-tillage contained 13 weed species at 79.12 plants per square metre.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- densitye0
- Value
- 79.12 plants m-2e0
- Setting
- no-tillage planting systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the no-tillage planting system, 13 species with density of 79.12 plants m-2 occurred”
t0“sweet pepper”
Claim · model-written summary
Phyllanthus tenellus and Commelina benghalensis had higher density under no-tillage.
- Taxon
- sweet pepperCapsicum annuumt0
- Interactor
- Phyllanthus tenellus
Moeroris tenellae0weed - Outcome
- higher densitye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phyllanthus tenellus and Commelina benghalensis the species with higher density”
t0“sweet pepper”
Claim · model-written summary
Croton lobatus stood out in relative dry mass despite lower density.
- Taxon
- sweet pepperCapsicum annuumt0
- Interactor
- Croton lobatus
_Klotzsch_-_Flickr_-_Alex_Popovkin%2C_Bahia%2C_Brazil_(5).jpg?width=60)
Astraea lobatae0weed - Outcome
- relative dry masse0
- Qualifier
- despite lower densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Klotzsch_-_Flickr_-_Alex_Popovkin%2C_Bahia%2C_Brazil_(5).jpg?width=500)
Verbatim
e0“relative dry mass, Croton lobatus species stand out from the others, despite lower density”
t0“sweet pepper”
Claim · model-written summary
Lobatos croton had an importance index of 14.13%.
- Taxon
- sweet pepperCapsicum annuumt0
- Interactor
- Lobatos crotone0weed
- Outcome
- index of relative importance valuee1
- Value
- 14.13%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lobatos croton, Phyllanthus tenellus and Commelina benghalensis with 14.13%, 14.02 % and 12.35%”
e1“the highes index of relative importance value”
t0“sweet pepper”
Claim · model-written summary
Phyllanthus tenellus had an importance index of 14.02%.
- Taxon
- sweet pepperCapsicum annuumt0
- Interactor
- Phyllanthus tenellusMoeroris tenellae0weed
- Outcome
- index of relative importance valuee1
- Value
- 14.02 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phyllanthus tenellus and Commelina benghalensis with 14.13%, 14.02 % and 12.35%”
e1“the highes index of relative importance value”
t0“sweet pepper”
Claim · model-written summary
Commelina benghalensis had an importance index of 12.35%.
- Taxon
- sweet pepperCapsicum annuumt0
- Interactor
- Commelina benghalensis
Commelina benghalensise0weed - Outcome
- index of relative importance valuee1
- Value
- 12.35%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Commelina benghalensis with 14.13%, 14.02 % and 12.35%”
e1“the highes index of relative importance value”
t0“sweet pepper”
Claim · model-written summary
No-tillage reduced total weed density by 83.04% relative to conventional planting.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- no-tillage systeme0
- Interactor
- weede0weed
- Outcome
- total density of the weede0
- Direction
- reducinge0
- Value
- 83.04%e0
- Comparator
- conventional plating systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the no-tillage system changed the dynamics of the weed community, reducing the total density of the weed by 83.04% if compared to conventional plating system”
t0“sweet pepper”
The same questions in other papers
tillage · weed · Capsicum annuum (sweet pepper)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
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.