Abstract
Biostimulation and precision irrigation are strategies that increase the sustainability of agriculture, and both have been widely studied in table grapes, but their interaction is a new approach for viticulture. The objective of this field trial was to assess the physiological effects of water deficit on table grapes pretreated for two consecutive years with five different biostimulation programs. Therefore, during the first year, vines were preconditioned with biostimulants composed of microorganisms, seaweed, and plant extracts and compared to an untreated control. During the second year, the same biostimulation treatments were evaluated under two different irrigation schedules: (i) farmer irrigation (FI), according to a farmer's criteria; and (ii) a deficit irrigation program, precision irrigation (PI), in which irrigation water was reduced from the post-veraison period to harvest, setting a threshold for allowable soil water depletion of 10% with respect to field capacity in order to minimize water leaching. The water inputs in the treatments under PI were reduced by 30% with respect to the FI treatment. While the deficit irrigation treatment clearly affected the plant water status indicators, biostimulation enhanced the root colonization by mycorrhizae and showed a trend of increased new root density. The combined effect of biostimulation and PI was shown to be an efficient strategy for optimizing the available resources, promoting the yield precocity.
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Claims 6
Claim · model-written summary
Precision irrigation reduced water input by 30% relative to farmer irrigation.
Verbatim
t0“Table Grapes”
e0“The water inputs in the treatments under PI were reduced by 30% with respect to the FI treatment.”
Claim · model-written summary
Deficit irrigation affected plant water status indicators.
Not reportedComparatorDirection
Verbatim
t0“Table Grapes”
e0“the deficit irrigation treatment clearly affected the plant water status indicators”
Claim · model-written summary
Biostimulation enhanced root colonization by mycorrhizae.
- Taxon
- Table Grapest0
- Treatment
- biostimulatione0
- Interactor
- mycorrhizaee0symbiont
- Outcome
- root colonization by mycorrhizaee0
- Direction
- enhancede0
Not reportedComparator
Verbatim
t0“Table Grapes”
e0“biostimulation enhanced the root colonization by mycorrhizae”
Claim · model-written summary
Biostimulation showed a trend toward increased new root density.
- Taxon
- Table Grapest0
- Treatment
- biostimulatione0
- Outcome
- new root densitye0
- Direction
- increasede0
- Qualifier
- a trende0
Not reportedComparator
Verbatim
t0“Table Grapes”
e0“biostimulation enhanced the root colonization by mycorrhizae and showed a trend of increased new root density”
Claim · model-written summary
Combined biostimulation and precision irrigation promoted earlier yield.
Not reportedComparator
Verbatim
t0“Table Grapes”
e0“The combined effect of biostimulation and PI was shown to be an efficient strategy for optimizing the available resources, promoting the yield precocity.”
Claim · model-written summary
Combined biostimulation and precision irrigation was judged an efficient strategy for resource use.
Verbatim
t0“Table Grapes”
e0“The combined effect of biostimulation and PI was shown to be an efficient strategy for optimizing the available resources”
The same questions in other papers
irrigation · yield · VitisResults differ
51 papers in the same direction as this paper · 28 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- positive
- positive
79 papers more in this group
See all 83 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.