Abstract
Soil and root parameters that influence nutrient uptake were evaluated in this study of comparing the effectiveness of phosphate fertilizers in an acid soil. North Carolina rock phosphate (RP), partially acidulated Togo rock phosphate (PA), monocalcium phosphate (MCP), and diammonium phosphate (DAP) were applied to limed (pH 5,6) or unlimed (pH4,6) soil samples. Eighteen days later, transplanted corn (Zea mays L.) seedlings were grown in pots for 12 days. Soluble phosphates, DAP and MCP, were the most efficient fertilizers for increasing corn dry matter on limed pots; in absernce of limestone, the best yield was obained with DAP because it decreased soil solution A1. Phosphorus in the soil solution (Pli) was lower on limed than on unlimed samples, but resin-exchangeable P was not affected by liming. MCP gave the highest increase of Pil on unlimed samples whereas DAP did it in presence of liming. Root dry matter and root length were greater on limed than on unlimed pots for all sources of P, except for DAP, where the soil acidity had no detrimental effect on these parameters.
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Claims 10
Claim · model-written summary
DAP and MCP were most efficient at increasing corn dry matter in limed pots.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- DAP and MCPe0
- Outcome
- corn dry mattere0
- Direction
- increasinge0
- Setting
- limed potse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble phosphates, DAP and MCP, were the most efficient fertilizers for increasing corn dry matter on limed pots”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
Without limestone, DAP gave the best corn yield.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- DAPe0
- Outcome
- yielde0
- Direction
- beste0
- Qualifier
- absernce of limestonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in absernce of limestone, the best yield was obained with DAP because it decreased soil solution A1.”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
DAP decreased soil solution A1 without limestone.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- DAPe0
- Outcome
- soil solution A1e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in absernce of limestone, the best yield was obained with DAP because it decreased soil solution A1.”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
Limed samples had less phosphorus in soil solution than unlimed samples.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- limede0
- Outcome
- Phosphorus in the soil solutione0
- Direction
- lowere0
- Comparator
- unlimede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus in the soil solution (Pli) was lower on limed than on unlimed samples”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
Liming did not change resin-exchangeable P.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- liminge0
- Outcome
- resin-exchangeable Pe0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resin-exchangeable P was not affected by liming.”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
MCP gave the greatest Pil increase in unlimed samples.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- MCPe0
- Outcome
- Pile0
- Direction
- highest increasee0
- Qualifier
- unlimed samplese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MCP gave the highest increase of Pil on unlimed samples whereas DAP did it in presence of liming.”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
DAP gave the greatest Pil increase with liming.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- DAPe0
- Outcome
- Pile0
- Direction
- increasee0
- Qualifier
- presence of liminge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MCP gave the highest increase of Pil on unlimed samples whereas DAP did it in presence of liming.”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
Liming increased corn root dry matter for P sources other than DAP.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- limede0
- Outcome
- Root dry mattere0
- Direction
- greatere0
- Qualifier
- except for DAPe0
- Comparator
- unlimed potse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root dry matter and root length were greater on limed than on unlimed pots for all sources of P, except for DAP”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
Liming increased corn root length for P sources other than DAP.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- limede0
- Outcome
- root lengthe0
- Direction
- greatere0
- Qualifier
- except for DAPe0
- Comparator
- unlimed potse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root dry matter and root length were greater on limed than on unlimed pots for all sources of P, except for DAP”
e1“corn (Zea mays L.) seedlings”
Claim · model-written summary
Soil acidity did not harm root dry matter or length under DAP.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- soil aciditye0
- Outcome
- Root dry matter and root lengthe1
- Direction
- no detrimental effecte0
- Qualifier
- DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“except for DAP, where the soil acidity had no detrimental effect on these parameters.”
e1“Root dry matter and root length were greater on limed than on unlimed pots for all sources of P, except for DAP”
e2“corn (Zea mays L.) seedlings”
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