Abstract
This research’s aims were to evaluate the mixture ratios of P fertilizers in irrigated corn yield in two seasons as well as evaluate the capacity of Resin and Mehlich 1 extractors to predict the P availability under field conditions in two soils: Hapludults and Oxisol. In the first crop, the experimental design was randomized block with four replications where two P sources, Triple Superphosphate (TSP) and Daoui Natural Phosphate (DNP), were tested in four rations (100%:0%; 67%:33%; 33%:67%; 0%:100%). The second planting was carried out in a similar manner, with some modifications to verify the residual effect of the fertilizers. DNP provided lower productivity and leaf P levels when compared to TSP in the first year but the DNP contributed with a higher residual effect through the test conditions. DNP fertilization provided higher residual effect in Hapludults than in Oxisol. Only Resin extractor, in Oxisol without TSP application in the second cultivation, was efficient in estimating the availability of P to the corn plants in the experiment conditions. In the experiment conditions, DNP provided productivity and leaf P levels similar to Triple Superphosphate in the first year and its residual effect is highly dependent on the soil type. Key words: Zea mays, fertilizing, phosphorus, extractors.
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Claims 6
Claim · model-written summary
DNP gave lower corn productivity and leaf P levels than TSP in the first year.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- DNPe1
- Outcome
- productivity and leaf P levelse1
- Direction
- lowere1
- Qualifier
- in the first yeare1
- Comparator
- TSPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irrigated corn production”
e1“DNP provided lower productivity and leaf P levels when compared to TSP in the first year”
Claim · model-written summary
DNP contributed a higher residual effect than TSP through the test conditions.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- DNPe1
- Outcome
- residual effecte1
- Direction
- highere1
- Qualifier
- through the test conditionse1
- Comparator
- TSPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irrigated corn production”
e1“DNP provided lower productivity and leaf P levels when compared to TSP in the first year but the DNP contributed with a higher residual effect through the test conditions”
Claim · model-written summary
DNP fertilisation gave a higher residual effect in Hapludults than in Oxisol.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- DNP fertilizatione2
- Outcome
- residual effecte2
- Direction
- highere2
- Comparator
- Oxisole2
- Setting
- Hapludultse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irrigated corn production”
e2“DNP fertilization provided higher residual effect in Hapludults than in Oxisol”
Claim · model-written summary
Resin extractor, in Oxisol without TSP in the second cultivation, was efficient at estimating P availability to corn, compared with Mehlich 1.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- estimating the availability of Pe3
- Qualifier
- without TSP application in the second cultivatione3
- Comparator
- Mehlich 1e4
- Setting
- Oxisole3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irrigated corn production”
e3“Only Resin extractor, in Oxisol without TSP application in the second cultivation, was efficient in estimating the availability of P to the corn plants in the experiment conditions”
e4“evaluate the capacity of Resin and Mehlich 1 extractors to predict the P availability under field conditions”
Claim · model-written summary
DNP gave corn productivity and leaf P levels similar to TSP in the first year.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- DNPe5
- Outcome
- productivity and leaf P levelse5
- Direction
- no_changeinferrede5
- Qualifier
- in the first yeare5
- Comparator
- Triple Superphosphatee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irrigated corn production”
e5“In the experiment conditions, DNP provided productivity and leaf P levels similar to Triple Superphosphate in the first year”
Claim · model-written summary
The residual effect of DNP is highly dependent on soil type.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- residual effecte6
- Setting
- soil typee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“irrigated corn production”
e6“its residual effect is highly dependent on the soil type”
The same questions in other papers
phosphorus · yield · Zea mays (maize)Positive and negative results
77 papers in the same direction as this paper · 549 in the opposite direction
- no effect
- positive
- positive
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See all 627 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.