Abstract
The objective of this study was to evaluate the initial growth of maize plants and phosphorus use efficiency due to phosphate fertilization with or without polymer coating for controlled nutrient release. The experiment was conducted in a greenhouse. Ten treatments were accomplished under a 5 x 2 factorial scheme, with five doses of phosphorus and two types of monoammonium phosphate (MAP), with and without polymer coating. The experimental design consisted of three maize plants grown in a 5 liter plastic pot. The study was conducted for 30 days when the phosphorus content, dry matter production and nutrient use efficiency were measured in the plant. The data obtained were submitted to analysis of variance by the F-test at 5% probability, the quantitative data were submitted to regression analysis according to the doses, and the qualitative data according to the source by the Tukey test. The plants fertilized with conventional MAP had averages higher than the ones fertilized with polymer-coated MAP at 50, 150 and 200 mg doses of P dm -3 soil. The initial growth of maize plants was higher when they were fertilized with conventional MAP. The efficiency in P use did not increase with the polymer-coated source, but decreased with doses of both sources
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Claims 4
Claim · model-written summary
Conventional MAP yielded higher plant averages than polymer-coated MAP at three phosphorus doses.
- Treatment
- conventional MAPe0
- Outcome
- averagese0
- Direction
- highere0
- Qualifier
- at 50, 150 and 200 mg doses of P dm -3 soile0
- Comparator
- polymer-coated MAPe0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants fertilized with conventional MAP had averages higher than the ones fertilized with polymer-coated MAP at 50, 150 and 200 mg doses of P dm -3 soil.”
e1“The initial growth of maize plants was higher when they were fertilized with conventional MAP.”
Claim · model-written summary
Initial maize growth was higher with conventional MAP than with polymer-coated MAP.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The initial growth of maize plants was higher when they were fertilized with conventional MAP.”
e1“The plants fertilized with conventional MAP had averages higher than the ones fertilized with polymer-coated MAP”
Claim · model-written summary
Polymer-coated MAP did not increase phosphorus use efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The efficiency in P use did not increase with the polymer-coated source”
t0“maize”
Claim · model-written summary
Phosphorus use efficiency decreased with rising doses of both MAP sources.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the efficiency in P use did not increase with the polymer-coated source, but decreased with doses of both sources”
t0“maize”
The same questions in other papers
ammonium dihydrogen phosphate · growth · Zea mays (maize)Positive and negative results
4 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- 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.