Abstract
ABSTRACT This study was carried out to evaluate the contributions to the optimization of water use in a carrot crop under different forms of mulch using Gliricidia sepium, fertilization with castor bean cakes and irrigation water depths. The experiment was conducted in Seropédica, RJ, Brazil (22º 46’ S and 43º 41’ W), from June to September 2010. The experiment was conducted using a split-split-plot scheme (5 x 3 x 2), with four replicates. The five plots had irrigation depths corresponding to 0, 43, 72, 100 and 120% of crop evapotranspiration (ETc); the three subplots contained the different forms of mulch (whole leaves (WL) and chopped leaves and branches (CLB)) and the absence of mulch (AM); and the two sub-subplots contained either the presence (PF) or absence of fertilization (AF). Using time domain reflectometry (TDR) in the irrigation management, water depths ranging from 67.8 to 285.5 mm were applied. The use of mulch in association with fertilization led to higher yields and water-use efficiency (WUE) of the carrot plants, and the mulch composed of WL performed best. The application of irrigation depths corresponding to 97% of ETc promoted the highest carrot yields, although the highest values of WUE were observed, with irrigation depths corresponding to a range from 51 to 68% of ETc.
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Claims 5
Claim · model-written summary
Mulch with fertilizer increased carrot yield.
- Taxon
- carrot
Daucus carotae0 - Treatment
- mulch in association with fertilizatione0
- Outcome
- yieldse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of mulch in association with fertilization led to higher yields and water-use efficiency (WUE) of the carrot plants”
Claim · model-written summary
Mulch with fertilizer increased carrot water use efficiency.
- Taxon
- carrotDaucus carotae0
- Treatment
- mulch in association with fertilizatione0
- Outcome
- water-use efficiency (WUE)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of mulch in association with fertilization led to higher yields and water-use efficiency (WUE) of the carrot plants”
Claim · model-written summary
Whole leaf mulch performed best.
Not reportedTaxon
Verbatim
e0“the mulch composed of WL performed best”
Claim · model-written summary
Irrigation at 97% ETc gave highest carrot yields.
- Taxon
- carrotDaucus carotae0
- Treatment
- irrigation depths corresponding to 97% of ETce0
- Outcome
- carrot yieldse0
- Direction
- higheste0
- Value
- 97% of ETce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of irrigation depths corresponding to 97% of ETc promoted the highest carrot yields”
Claim · model-written summary
Irrigation at 51 to 68% ETc gave highest water use efficiency.
- Treatment
- irrigation depths corresponding to a range from 51 to 68% of ETce0
- Outcome
- WUEe0
- Direction
- higheste0
- Value
- 51 to 68% of ETce0
Not reportedTaxonComparator
Verbatim
e0“the highest values of WUE were observed, with irrigation depths corresponding to a range from 51 to 68% of ETc”
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