Abstract
Passion fruit cultivation relies on irrigation to increase yields in the semiarid of northeastern Brazil. Water scarcity is one of the factors that most affect crop physiology, leading to lower yields. Therefore, this study aimed to assess the influence of planting hole volume and application of a hydroretentive polymer on physiological and productive aspects of irrigated yellow passion fruit cv. BRS GA1 in the Northeast semi-arid region of Brazil. The experiment was conducted in randomized blocks, in a split-plot design 2 × (2 × 2). Treatments consisted of irrigation depths (100% and 70% of the crop's evapotranspiration requirement - ETc), planting hole volumes (64 dm3 and 128 dm3), and soil with and without application of hydroretentive Polymer (1.5 g dm3), with four replicates and three plants per plot. The analyzed variables included chlorophyll a and b indices, gas exchange, and yellow passion fruit yield. The findings showed that hydroretentive polymer application to the soil increases chlorophyll content and gas exchange in yellow passion fruit. Moreover, photosynthetic rates were not limited by a 30% reduction in irrigation depth and increased in plants grown in 128-dm3 planting holes with hydroretentive polymer. Based on yield results, irrigation depths can be reduced to 70% of the ETc by applying hydroretentive polymer in 64-dm3 planting holes.
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Claims 4
Claim · model-written summary
Hydroretentive polymer increased chlorophyll content and gas exchange.
- Taxon
- yellow passion fruite0
- Treatment
- hydroretentive polymer applicatione0
- Outcome
- chlorophyll content and gas exchangee0
- Direction
- increasese0
Not reportedComparator
Verbatim
e0“hydroretentive polymer application to the soil increases chlorophyll content and gas exchange in yellow passion fruit.”
Claim · model-written summary
A 30% reduction in irrigation depth did not limit photosynthetic rates.
- Taxon
- yellow passion fruite1
- Material
- BRS GA1e1
- Treatment
- 30% reduction in irrigation depthe0
- Outcome
- photosynthetic ratese0
- Direction
- not limitede0
Not reportedComparator
Verbatim
e0“photosynthetic rates were not limited by a 30% reduction in irrigation depth”
e1“irrigated yellow passion fruit cv. BRS GA1”
Claim · model-written summary
Photosynthetic rates rose in 128-dm3 planting holes with polymer.
- Taxon
- yellow passion fruite1
- Material
- BRS GA1e1
- Treatment
- 128-dm3 planting holes with hydroretentive polymere0
- Outcome
- photosynthetic ratese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“photosynthetic rates were not limited by a 30% reduction in irrigation depth and increased in plants grown in 128-dm3 planting holes with hydroretentive polymer.”
e1“irrigated yellow passion fruit cv. BRS GA1”
Claim · model-written summary
The authors conclude irrigation can be reduced to 70% ETc with polymer in 64-dm3 holes based on yield.
Verbatim
e0“Based on yield results, irrigation depths can be reduced to 70% of the ETc by applying hydroretentive polymer in 64-dm3 planting holes.”
e1“irrigated yellow passion fruit cv. BRS GA1”
The same questions in other papers
irrigation · physiology: photosynthesis · Passiflora edulis (passion fruit)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
2 papers more in this group
See all 6 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.