Abstract
ABSTRACT Weed interference is one of the factors that reduces carrot yield considerably. The aim of this study was to determine the periods of weed interference in carrots cultivated under two localized irrigation systems. The experiment used a completely randomized block design, with three replications, using the split plot scheme. The plots consisted of two irrigation systems (drip and micro sprinkler) and the subplots corresponded to the duration of coexistence of the crop with weeds, comprising periods of control (weed -free) or coexistence (with weeds) (0, 10, 20, 30, 40, 50, and 120 days after emergence (DAE) of the crop). Considering a yield loss of 2.5%, 5%, and 10% in marketable carrots, the beginning and end of the critical period of weed control (CPWC) was determined by adjusting a sigmoid model to the relative production data. The presence of the weed community throughout the crop cycle resulted in yield losses of up to 98%. The CPWP varied for the irrigation systems used. Carrot cultivation with and without competition, under the micro sprinkler irrigation system showed a higher yield than with the drip system. Considering a yield loss of 5%, the CPWC was 23 DAE and 7 DAE in the drip irrigation and micro sprinkler irrigation systems, respectively.
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Claims 5
Claim · model-written summary
Weeds throughout the carrot crop cycle caused yield losses up to 98%.
- Taxon
- carrot
Daucus carotat0 - Treatment
- presence of the weed community throughout the crop cyclee0
- Interactor
- weed communitye0weed
- Outcome
- yield lossese0
- Direction
- lossese0
- Value
- 98%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of the weed community throughout the crop cycle resulted in yield losses of up to 98%.”
t0“carrot”
Claim · model-written summary
The critical weed-control period varied between irrigation systems.
- Taxon
- carrotDaucus carotat0
- Treatment
- irrigation systemse0
- Outcome
- CPWPe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CPWP varied for the irrigation systems used.”
t0“carrot”
Claim · model-written summary
Micro-sprinkler irrigation yielded more carrots than drip irrigation with and without weed competition.
- Taxon
- CarrotDaucus carotae0
- Treatment
- micro sprinkler irrigation systeme0
- Outcome
- yielde0
- Direction
- highere0
- Qualifier
- with and without competitione0
- Comparator
- drip systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carrot cultivation with and without competition, under the micro sprinkler irrigation system showed a higher yield than with the drip system.”
Claim · model-written summary
At 5% permitted yield loss, the drip system critical weed-control period was 23 DAE.
- Taxon
- carrotDaucus carotat0
- Treatment
- drip irrigatione0
- Outcome
- CPWCe0
- Value
- 23 DAEe0
- Qualifier
- yield loss of 5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Considering a yield loss of 5%, the CPWC was 23 DAE and 7 DAE in the drip irrigation and micro sprinkler irrigation systems, respectively.”
t0“carrot”
Claim · model-written summary
At 5% permitted yield loss, the micro-sprinkler critical weed-control period was 7 DAE.
- Taxon
- carrotDaucus carotat0
- Treatment
- micro sprinkler irrigatione0
- Outcome
- CPWCe0
- Value
- 7 DAEe0
- Qualifier
- yield loss of 5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Considering a yield loss of 5%, the CPWC was 23 DAE and 7 DAE in the drip irrigation and micro sprinkler irrigation systems, respectively.”
t0“carrot”
The same questions in other papers
irrigation · yield · Daucus carota (carrot)Positive and negative results
17 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
21 papers more in this group
See all 25 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.