Abstract
Maintaining the plant architecture of Psidium guajava L. (guava tree) is essential for enhancing capture and distribution in the plant, directly affecting the fruit quality. The lifespan of the harvest period can be extended by proper pruning. Both timeliness and proper pruning play crucial roles in achieving high-quality fruit production and in maintaining a consistent fruit size while stimulating ascorbic acid levels, sugar content, total soluble solids (TSS), and titratable acidity. From this perspective, this study aimed to characterize the influence of different intensities of fruit pruning and thinning on guava trees grown under a seasonal tropical climate in two growing seasons in Currais, Piauí, Brazil. The experiment was set up in a randomized block design with a 3 × 3 × 2 factorial arrangement corresponding to short, medium, and long pruning intensities and 0%, 10%, and 20% thinning intensities during the two growth seasons, respectively. An analysis was performed to discriminate the treatment groups according to the physicochemical variables of the guava tree cv. Paluma and canonical discriminant analysis. There was significant variation in the SS, titratable acidity, ascorbic acid, and pH contents. Cluster analysis of all treatments allowed division into five different groups for the two pruning times. Canonical discriminant analysis showed that the first two canonical variables explained 91% of the total variance. The fruits of the second harvest exhibited a lower level of acidity, higher levels of soluble solids, and higher levels of ascorbic acid contents. In addition, these fruits also obtained better nutrient contents. Short pruning with up to 20% thinning, medium pruning with up to 10%, and long pruning without thinning favored better levels of macronutrients and micronutrients and, consequently, better fruit quality. Medium or long pruning with up to 20% thinning resulted in higher average fruit weights and nutrient contents (especially of Fe and Cu), lower acidity, and higher ascorbic acid contents. Thus, in general, the importance of production pruning in guava plants is evidenced and thinning of 20% is recommended to improve the fruit quality.
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Claims 14
Claim · model-written summary
Soluble solids, acidity, ascorbic acid and pH varied significantly among guava treatments.
- Taxon
- Psidium guajava
Psidium guajavat0 - Material
- Palumat0
- Outcome
- SS, titratable acidity, ascorbic acid, and pH contentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was significant variation in the SS, titratable acidity, ascorbic acid, and pH contents.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Cluster analysis divided guava treatments into five groups across two pruning times.
- Taxon
- Psidium guajavaPsidium guajavat0
- Material
- Palumat0
- Outcome
- division into five different groupse0
- Value
- five different groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster analysis of all treatments allowed division into five different groups for the two pruning times.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
The first two canonical variables explained 91% of variance in guava fruit properties.
- Taxon
- Psidium guajavaPsidium guajavat0
- Material
- Palumat0
- Outcome
- total variancee0
- Value
- 91%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Canonical discriminant analysis showed that the first two canonical variables explained 91% of the total variance.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Second-harvest guava fruit had lower acidity.
- Taxon
- Psidium guajavaPsidium guajavat0
- Organ / stage
- fruits of the second harveste0
- Outcome
- level of aciditye0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fruits of the second harvest exhibited a lower level of acidity”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Second-harvest guava fruit had higher soluble solids.
- Taxon
- Psidium guajavaPsidium guajavat0
- Organ / stage
- fruits of the second harveste1
- Outcome
- levels of soluble solidse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher levels of soluble solids”
e1“The fruits of the second harvest”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Second-harvest guava fruit had higher ascorbic acid contents.
- Taxon
- Psidium guajavaPsidium guajavat0
- Organ / stage
- fruits of the second harveste1
- Outcome
- ascorbic acid contentse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher levels of ascorbic acid contents”
e1“The fruits of the second harvest”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Second-harvest guava fruit had better nutrient contents.
- Taxon
- Psidium guajavaPsidium guajavat0
- Outcome
- nutrient contentse0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these fruits also obtained better nutrient contents”
e1“The fruits of the second harvest”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Short pruning with up to 20% thinning favored better guava nutrient levels and fruit quality.
- Taxon
- Psidium guajavaPsidium guajavat0
- Treatment
- Short pruning with up to 20% thinninge0
- Outcome
- levels of macronutrients and micronutrients and, consequently, better fruit qualitye0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short pruning with up to 20% thinning, medium pruning with up to 10%, and long pruning without thinning favored better levels of macronutrients and micronutrients and, consequently, better fruit quality.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Medium pruning with up to 10% thinning favored better guava nutrient levels and fruit quality.
- Taxon
- Psidium guajavaPsidium guajavat0
- Treatment
- medium pruning with up to 10%e0
- Outcome
- levels of macronutrients and micronutrients and, consequently, better fruit qualitye0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short pruning with up to 20% thinning, medium pruning with up to 10%, and long pruning without thinning favored better levels of macronutrients and micronutrients and, consequently, better fruit quality.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Long pruning without thinning favored better guava nutrient levels and fruit quality.
- Taxon
- Psidium guajavaPsidium guajavat0
- Treatment
- long pruning without thinninge0
- Outcome
- levels of macronutrients and micronutrients and, consequently, better fruit qualitye0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short pruning with up to 20% thinning, medium pruning with up to 10%, and long pruning without thinning favored better levels of macronutrients and micronutrients and, consequently, better fruit quality.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Medium or long pruning with up to 20% thinning increased guava fruit weight and nutrient contents.
- Taxon
- Psidium guajavaPsidium guajavat0
- Treatment
- Medium or long pruning with up to 20% thinninge0
- Outcome
- average fruit weights and nutrient contentse0
- Direction
- highere0
- Qualifier
- especially of Fe and Cue0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Medium or long pruning with up to 20% thinning resulted in higher average fruit weights and nutrient contents (especially of Fe and Cu)”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Medium or long pruning with up to 20% thinning lowered guava fruit acidity.
- Taxon
- Psidium guajavaPsidium guajavat0
- Treatment
- Medium or long pruning with up to 20% thinninge0
- Outcome
- aciditye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Medium or long pruning with up to 20% thinning resulted in higher average fruit weights and nutrient contents (especially of Fe and Cu), lower acidity, and higher ascorbic acid contents.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
Medium or long pruning with up to 20% thinning raised guava ascorbic acid content.
- Taxon
- Psidium guajavaPsidium guajavat0
- Treatment
- Medium or long pruning with up to 20% thinninge0
- Outcome
- ascorbic acid contentse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Medium or long pruning with up to 20% thinning resulted in higher average fruit weights and nutrient contents (especially of Fe and Cu), lower acidity, and higher ascorbic acid contents.”
t0“Psidium guajava cv. Paluma”
Claim · model-written summary
The authors recommend 20% thinning to improve guava fruit quality.
- Taxon
- Psidium guajavaPsidium guajavat0
- Outcome
- thinning of 20% is recommendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thinning of 20% is recommended to improve the fruit quality”
t0“Psidium guajava cv. Paluma”
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