Abstract
Abstract Potassium (K) nutrient existent in the soil does not always supply pear tree ( Pyrus communis L.) demand, which makes the use of potassium‐based fertilizer necessary. The objective of this study was to evaluate the impact of potassium fertilization on yield and pears quality in order to establish critical K levels in soil and leaves. The treatments consisted of K application rates of control, 40, 80, 120 and 160 kg K 2 O ha −1 yr −1 during four crops (2013 to 2017). The fruit quantity, mass and yield were evaluated, and leaves were collected for nutrient analysis. Stratified soil samples were collected, prepared and subjected to exchangeable K extraction by Mehlich‐1. In the last two crops, peel color, ethylene production, and respiratory rate were also evaluated after 90 days inside a controlled atmosphere storage chamber. After storage, pears were submitted to a shelf life of 7 days to evaluate the epidermis color, ethylene production, respiratory rate, total titratable acidity (TTA), soluble solids (SS), and pulp firmness. Potassium fertilization increased the exchangeable K contents in the soil, but it was not always correlated with an increase of K concentration in the leaves and fruit. The most economical dose was 45.40 kg K 2 O ha −1 in the 2016/2017 crop season. It was not possible to estimate K critical levels in the soil and leaves. The fruits submitted to higher doses of K showed the lowest values of ethylene production and respiration rate, which resulted in an increase in storage life in cold rooms and on the shelves.
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Claims 6
Claim · model-written summary
Potassium fertilization increased exchangeable soil K contents in the pear orchard relative to the control.
- Taxon
- pear tree
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communise0 - Treatment
- K application ratese2
- Outcome
- exchangeable K contents in the soile1
- Direction
- increasede1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“pear tree ( Pyrus communis L.)”
e1“Potassium fertilization increased the exchangeable K contents in the soil”
e2“K application rates of control, 40, 80, 120 and 160 kg K 2 O ha −1 yr −1”
Claim · model-written summary
Potassium fertilization was not always correlated with higher K concentration in pear leaves and fruit.
- Taxon
- pear treePyrus communise0
- Treatment
- Potassium fertilizatione1
- Outcome
- K concentration in the leaves and fruite1
- Direction
- not always correlated with an increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pear tree ( Pyrus communis L.)”
e1“Potassium fertilization increased the exchangeable K contents in the soil, but it was not always correlated with an increase of K concentration in the leaves and fruit”
Claim · model-written summary
The most economical potassium dose for pear was 45.40 kg K2O per hectare in the 2016/2017 crop season.
- Taxon
- pear treePyrus communise0
- Outcome
- most economical dosee1
- Value
- 45.40 kg K 2 O ha −1e1
- Setting
- 2016/2017 crop seasone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pear tree ( Pyrus communis L.)”
e1“The most economical dose was 45.40 kg K 2 O ha −1 in the 2016/2017 crop season”
Claim · model-written summary
Critical K levels could not be estimated for pear soil or leaves.
- Taxon
- pear treePyrus communise0
- Outcome
- K critical levels in the soil and leavese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pear tree ( Pyrus communis L.)”
e1“It was not possible to estimate K critical levels in the soil and leaves”
Claim · model-written summary
Pears from the higher K doses had the lowest ethylene production and respiration rate.
- Taxon
- pear treePyrus communise0
- Treatment
- higher doses of Ke1
- Outcome
- ethylene production and respiration ratee1
- Direction
- lowest valuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pear tree ( Pyrus communis L.)”
e1“The fruits submitted to higher doses of K showed the lowest values of ethylene production and respiration rate”
Claim · model-written summary
Pears from the higher K doses had longer storage life in cold rooms and on shelves.
- Taxon
- pear treePyrus communise0
- Treatment
- higher doses of Ke1
- Outcome
- storage life in cold rooms and on the shelvese1
- Direction
- an increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pear tree ( Pyrus communis L.)”
e1“The fruits submitted to higher doses of K showed the lowest values of ethylene production and respiration rate, which resulted in an increase in storage life in cold rooms and on the shelves”
The same questions in other papers
potassium · nutrient: content · Pyrus communis (pear)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.