Abstract
Rice, dry bean, corn, and soybean are important food crops. Phosphorus (P) deficiency is one of the most yield-limiting factors for these crops grown on highly weathered Brazilian Oxisols. Four greenhouse experiments were conducted to determine P requirements of these four crops. The P levels used were 0, 50, 100, 200, and 400 mg kg−1. Growth, yield, and yield components evaluated of four crop species were significantly increased with the application of P fertilization. Most of the responses were quadratic in fashion when the P was applied in the range of 0 to 400 mg kg−1. Maximum grain yield of upland rice was obtained with the application of 238 mg P kg−1 of soil, maximum dry bean grain yield was obtained with the application of 227 mg P kg−1 of soil, and maximum grain yield of soybean was obtained with the application of 224 mg P kg−1 of soil. Maximum shoot growth of corn was obtained with the addition of 323 mg P kg−1 of soil. Most of the growth and yield components had significant positive association with grain yield or shoot dry weight. Phosphorus concentration and uptake were greater in the grain compared to straw in upland rice and dry bean plants. Overall, P-use efficiencies decreased with increasing P rates.
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Claims 12
Claim · model-written summary
Rice growth, yield, and yield components increased with phosphorus fertilization.
- Taxon
- Rice
Oryza sativat0 - Treatment
- P fertilizatione0
- Outcome
- Growth, yield, and yield componentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth, yield, and yield components evaluated of four crop species were significantly increased with the application of P fertilization.”
t0“Rice”
Claim · model-written summary
dry bean growth, yield, and yield components increased with phosphorus fertilization.
- Taxon
- dry beant0
- Treatment
- P fertilizatione0
- Outcome
- Growth, yield, and yield componentse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Growth, yield, and yield components evaluated of four crop species were significantly increased with the application of P fertilization.”
t0“dry bean”
Claim · model-written summary
corn growth, yield, and yield components increased with phosphorus fertilization.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- P fertilizatione0
- Outcome
- Growth, yield, and yield componentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth, yield, and yield components evaluated of four crop species were significantly increased with the application of P fertilization.”
t0“corn”
Claim · model-written summary
soybean growth, yield, and yield components increased with phosphorus fertilization.
- Taxon
- soybean
Glycine maxt0 - Treatment
- P fertilizatione0
- Outcome
- Growth, yield, and yield componentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth, yield, and yield components evaluated of four crop species were significantly increased with the application of P fertilization.”
t0“soybean”
Claim · model-written summary
upland rice reached maximum grain yield at 238 mg P kg−1 of soil.
- Taxon
- upland riceOryza sativae0
- Treatment
- 238 mg P kg−1 of soile0
- Outcome
- grain yielde0
- Direction
- Maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum grain yield of upland rice was obtained with the application of 238 mg P kg−1 of soil”
Claim · model-written summary
dry bean reached maximum dry bean grain yield at 227 mg P kg−1 of soil.
Not reportedComparator
Verbatim
e0“maximum dry bean grain yield was obtained with the application of 227 mg P kg−1 of soil”
Claim · model-written summary
soybean reached maximum grain yield at 224 mg P kg−1 of soil.
- Taxon
- soybeanGlycine maxe0
- Treatment
- 224 mg P kg−1 of soile0
- Outcome
- grain yielde0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum grain yield of soybean was obtained with the application of 224 mg P kg−1 of soil”
Claim · model-written summary
corn reached maximum shoot growth at 323 mg P kg−1 of soil.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 323 mg P kg−1 of soile0
- Outcome
- shoot growthe0
- Direction
- Maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum shoot growth of corn was obtained with the addition of 323 mg P kg−1 of soil”
Claim · model-written summary
Most growth and yield components were positively associated with grain yield or shoot dry weight.
Not reportedTaxon
Verbatim
e0“Most of the growth and yield components had significant positive association with grain yield or shoot dry weight.”
Claim · model-written summary
Phosphorus concentration and uptake were greater in grain than straw in upland rice.
- Taxon
- upland riceOryza sativae0
- Organ / stage
- graine0
- Outcome
- Phosphorus concentration and uptakee0
- Direction
- greatere0
- Comparator
- strawe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus concentration and uptake were greater in the grain compared to straw in upland rice and dry bean plants.”
Claim · model-written summary
Phosphorus concentration and uptake were greater in grain than straw in dry bean.
Verbatim
e0“Phosphorus concentration and uptake were greater in the grain compared to straw in upland rice and dry bean plants.”
Claim · model-written summary
P-use efficiencies declined as P rates increased.
Verbatim
e0“Overall, P-use efficiencies decreased with increasing P rates.”
t0“Upland Rice, Dry Bean, Soybean, and Corn”
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