Abstract
The growth of forest species is affected by nutritional restrictions. Therefore, the objective of this study was to evaluate the contribution of nitrogen and phosphate fertilization to the initial growth of forest species implanted in field. For this purpose, two experiments were carried out for 11 months, using a randomized complete block design with four replications, in a 2 x 4 factorial arrangement: two forest species (Toona ciliata and Eucalyptus grandis), four nitrogen doses in Experiment I (0, 25, 50 and 75 kg ha-1 of N) and four phosphorus doses in experiment II (0, 50, 100 and 150 kg ha-1 of P2O5). The evaluated parameters were: plant height, diameter at breast height and leaf concentration of nutrients. The data were submitted to analysis of variance. Adjusted regression models were based on the applied amounts of nutrients. The contribution of nitrogen fertilization to growth in height and diameter was equal in forest species, indicating the dose of 47 kg ha -1 of nitrogen with higher growth in the average of the two parameters evaluated. Phosphate fertilization showed no response in the growth of forest species due to the adequate phosphorus content of the soil in which the experiment was conducted. The leaf concentrations of nitrogen and phosphorus were not altered by the respective nutrient doses applied in the forest species. However, higher nutrient concentrations were observed in T. ciliata, indicating higher nutritional requirement compared to E. grandis
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Claims 4
Claim · model-written summary
Nitrogen fertilization contributed equally to height and diameter growth of the two forest species, with 47 kg ha -1 of nitrogen giving higher average growth
- Taxon
- Toona ciliata and Eucalyptus grandis
Toona ciliata
Eucalyptus grandist0 - Treatment
- nitrogen fertilizatione1
- Outcome
- growth in height and diametere1
- Direction
- highere1
- Value
- 47 kg ha -1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The contribution of nitrogen fertilization to growth in height and diameter was equal in forest species, indicating the dose of 47 kg ha -1 of nitrogen with higher growth in the average of the two parameters evaluated”
t0“Toona ciliata and Eucalyptus grandis”
Claim · model-written summary
Phosphate fertilization showed no response in the growth of the forest species, attributed to adequate soil phosphorus
- Taxon
- Toona ciliata and Eucalyptus grandisToona ciliataEucalyptus grandist0
- Treatment
- Phosphate fertilizatione2
- Outcome
- growthe2
- Direction
- no responsee2
- Qualifier
- adequate phosphorus content of the soile2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Phosphate fertilization showed no response in the growth of forest species due to the adequate phosphorus content of the soil in which the experiment was conducted”
t0“Toona ciliata and Eucalyptus grandis”
Claim · model-written summary
Nitrogen and phosphorus leaf concentrations were not altered by the respective nutrient doses applied
- Taxon
- Toona ciliata and Eucalyptus grandisToona ciliataEucalyptus grandist0
- Treatment
- respective nutrient dosese3
- Outcome
- leaf concentrations of nitrogen and phosphoruse3
- Direction
- not alterede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The leaf concentrations of nitrogen and phosphorus were not altered by the respective nutrient doses applied in the forest species”
t0“Toona ciliata and Eucalyptus grandis”
Claim · model-written summary
Leaf nutrient concentrations were higher in T. ciliata than in E. grandis, indicating a higher nutritional requirement of T. ciliata
- Taxon
- T. ciliataToona ciliatae4
- Outcome
- nutrient concentrationse4
- Direction
- highere4
- Comparator
- E. grandise4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“higher nutrient concentrations were observed in T. ciliata, indicating higher nutritional requirement compared to E. grandis”
The same questions in other papers
fertilization · growth · Toona ciliataPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
fertilization · growth · Eucalyptus grandis (rose gum)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- no effect
7 papers more in this group
See all 11 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.