Abstract
Salinity and nutrient deficiencies are the main constraints for high crop productivity. Interaction of diammonium phosphate and potassium sulphate in saline-sodic soil for maize (Zea mays L.) crop was investigated. The results demonstrated that maize responded well to K and P fertilization in saline-sodic soils. The effects of salinity and sodicity were ameliorated by the application of K and P fertilizers resulting in higher yield. K had greater influence on grain yield than P level. K application increased yield related parameters. The addition of P significant affected leaf [P] and [Na] content, Na:K and Ca:Na ratios. Potassium levels had significant effects on [Na], [K], [Mg] and Na:K ratio. Phosphorus and K interactions did not affect leaf chemical composition except Mg content. The P application resulted in an increase of [P] in maize leaf tissue as compared to control. A decrease in [Na] and Na:K ratio was observed with the addition of K. There was positive relationship between grain yield (R2 = 0.67), dry matter yield (R2 = 0.76) and leaf [P], respectively in soils treated with P. The tissue [Ca], ratios of Ca:K and Ca:P were non-significantly affected by the K and P treatments. Extractable [P] increased after P treatments in the soil. The application of K significantly decreased Na:K ratios in the soil. The decreasing trends of [Na] and Na:K ratios depicted a negative (R2 = 0.91) correlation between Na:K and soil [K]. Such interaction of K and P could mitigate the adverse effects of salinity and sodicity.
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Claims 14
Claim · model-written summary
Potassium and phosphorus fertilizers increased maize yield in saline-sodic soils.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of K and P fertilizers resulting in higher yield”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Potassium had a greater influence on grain yield than phosphorus level.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K had greater influence on grain yield than P level”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Potassium application increased yield-related parameters.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application increased yield related parameters”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Phosphorus affected leaf phosphorus and sodium content and Na:K and Ca:Na ratios.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of P significant affected leaf [P] and [Na] content, Na:K and Ca:Na ratios”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Potassium significantly affected leaf sodium, potassium, magnesium, and Na:K ratio.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium levels had significant effects on [Na], [K], [Mg] and Na:K ratio”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Phosphorus and potassium interactions did not affect leaf chemical composition except magnesium.
- Treatment
- Phosphorus and K interactionse0
- Outcome
- leaf chemical compositione0
- Direction
- did not affecte0
- Qualifier
- except Mg contente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus and K interactions did not affect leaf chemical composition except Mg content”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Phosphorus increased maize leaf phosphorus relative to control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The P application resulted in an increase of [P] in maize leaf tissue as compared to control”
Claim · model-written summary
Potassium decreased sodium and Na:K ratio.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in [Na] and Na:K ratio was observed with the addition of K”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Grain yield was positively related to leaf phosphorus in phosphorus-treated soils, with R2 = 0.67.
- Compound
- [P]e0
- Outcome
- grain yielde0
- Direction
- positive relationshipe0
- Value
- R2 = 0.67e0
- Setting
- soils treated with Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive relationship between grain yield (R2 = 0.67), dry matter yield (R2 = 0.76) and leaf [P], respectively in soils treated with P”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Dry matter yield was positively related to leaf phosphorus in phosphorus-treated soils, with R2 = 0.76.
- Compound
- [P]e0
- Outcome
- dry matter yielde0
- Direction
- positive relationshipe0
- Value
- R2 = 0.76e0
- Setting
- soils treated with Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive relationship between grain yield (R2 = 0.67), dry matter yield (R2 = 0.76) and leaf [P], respectively in soils treated with P”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Calcium content and Ca:K and Ca:P ratios were not significantly affected by potassium and phosphorus.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tissue [Ca], ratios of Ca:K and Ca:P were non-significantly affected by the K and P treatments”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Extractable soil phosphorus increased after phosphorus treatments.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extractable [P] increased after P treatments in the soil”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Potassium significantly decreased soil Na:K ratios.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of K significantly decreased Na:K ratios in the soil”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Soil Na:K ratio was negatively correlated with soil potassium, with R2 = 0.91.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative (R2 = 0.91) correlation between Na:K and soil [K]”
t0“Maize (Zea mays L.)”
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