Abstract
The main reasons for the fixation of some elements and consequently nutrient deficiencies, especially phosphorus, iron and zinc, are high levels of calcium (calcareous soils) and soil pH. Two sulfur fertilizers (sulfur alone and sulfur + organic material + Thiobacillus spp.) with two rates (2 and 4 kg sulfur/tree) were used to decrease soil pH and availability of P, Fe and Zn in apple trees during the growing season. A control treatment with no sulfur was also included in the experiment. The experiment was based on randomized complete blocks design with three replications and was carried out in the apple orchards of the West Azarbaijan province. Results showed that the sulfur treatments had significant effects on soil pH, chlorophyll content of leaves and phosphorus, iron and zinc concentrations of leaves and fruits in apple. On the average, applying sulfur decreased pH of soil and increased the chlorophyll content of leaves, and iron, zinc and phosphorus concentration of fruits in apple by17.09%, 4.8%, 30.24%, 11.61% and 18.76%, respectively, as compared to the control. Regarding the soil pH and other criteria about the nutrients availability and concentration, it seems that the application of 2 kg/tree sulfur fertilizer would be beneficial for apple orchards located in the highly alkaline soils of the area under study.
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Claims 6
Claim · model-written summary
Applying sulfur decreased soil pH in apple by 17.09% compared with the control.
- Taxon
- apple
Malus domesticae1 - Treatment
- applying sulfure1
- Outcome
- pH of soile1
- Direction
- decreasede1
- Value
- 17.09%e1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“applying sulfur decreased pH of soil and increased the chlorophyll content of leaves, and iron, zinc and phosphorus concentration of fruits in apple by17.09%, 4.8%, 30.24%, 11.61% and 18.76%, respectively, as compared to the control”
Claim · model-written summary
Applying sulfur increased the chlorophyll content of apple leaves by 4.8% compared with the control.
- Taxon
- appleMalus domesticae1
- Organ / stage
- leavese1
- Treatment
- applying sulfure1
- Outcome
- chlorophyll content of leavese1
- Direction
- increasede1
- Value
- 4.8%e1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“applying sulfur decreased pH of soil and increased the chlorophyll content of leaves, and iron, zinc and phosphorus concentration of fruits in apple by17.09%, 4.8%, 30.24%, 11.61% and 18.76%, respectively, as compared to the control”
Claim · model-written summary
Applying sulfur increased the iron concentration of apple fruits by 30.24% compared with the control.
- Taxon
- appleMalus domesticae1
- Organ / stage
- fruitse1
- Treatment
- applying sulfure1
- Outcome
- concentration of fruitse1
- Direction
- increasede1
- Value
- 30.24%e1
- Qualifier
- irone1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“applying sulfur decreased pH of soil and increased the chlorophyll content of leaves, and iron, zinc and phosphorus concentration of fruits in apple by17.09%, 4.8%, 30.24%, 11.61% and 18.76%, respectively, as compared to the control”
Claim · model-written summary
Applying sulfur increased the zinc concentration of apple fruits by 11.61% compared with the control.
- Taxon
- appleMalus domesticae1
- Organ / stage
- fruitse1
- Treatment
- applying sulfure1
- Outcome
- concentration of fruitse1
- Direction
- increasede1
- Value
- 11.61%e1
- Qualifier
- zince1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“applying sulfur decreased pH of soil and increased the chlorophyll content of leaves, and iron, zinc and phosphorus concentration of fruits in apple by17.09%, 4.8%, 30.24%, 11.61% and 18.76%, respectively, as compared to the control”
Claim · model-written summary
Applying sulfur increased the phosphorus concentration of apple fruits by 18.76% compared with the control.
- Taxon
- appleMalus domesticae1
- Organ / stage
- fruitse1
- Treatment
- applying sulfure1
- Outcome
- concentration of fruitse1
- Direction
- increasede1
- Value
- 18.76%e1
- Qualifier
- phosphoruse1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“applying sulfur decreased pH of soil and increased the chlorophyll content of leaves, and iron, zinc and phosphorus concentration of fruits in apple by17.09%, 4.8%, 30.24%, 11.61% and 18.76%, respectively, as compared to the control”
Claim · model-written summary
A 2 kg/tree sulfur fertilizer application would be beneficial for apple orchards on highly alkaline soils.
- Taxon
- appleMalus domesticae1
- Treatment
- 2 kg/tree sulfur fertilizere1
- Outcome
- beneficial for apple orchardse1
- Setting
- highly alkaline soilse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“it seems that the application of 2 kg/tree sulfur fertilizer would be beneficial for apple orchards located in the highly alkaline soils of the area under study”
The same questions in other papers
sulfur atom · molecular: metabolites · Malus domestica (apple)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
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.