Abstract
Abstract BACKGROUND Zinc (Zn) deficiency in crops is commonly aggravated by high levels of phosphorus (P) in soil. In this work, the initial performance of pot‐growing maize in response to the available P and Zn in soils with low available Zn and to the application of P and Zn fertilizers was investigated. RESULTS The soils (six non‐calcareous and 14 calcareous) ranged widely in available P (Olsen P: 5.5–37.9 mg kg −1 ), were poor in available Zn [diethylenetriaminepentaacetic acid‐extractable Zn (Zn DTPA ): 0.20–0.84 mg kg −1 ] and had an Olsen P/Zn DTPA ratio of 13 to 111 mg mg −1 . Soil P application generally increased aerial dry matter (ADM) yield; Zn increased ADM yield mostly when applied in combination with P; and the sole application of Zn increased yield only in a soil with a high (28 mg kg −1 ) Olsen P and a low (0.36 mg kg −1 ) Zn DTPA . The increase in ADM yield resulting from optimal application of P and/or Zn to the soil was modest in soils where the Olsen P/Zn DTPA ratio was 30–60 and Olsen P was >14 mg kg −1 . Zinc uptake by the control plants was correlated with the Zn DTPA of the soil. For a certain Zn DTPA value, the level of plant available Zn was higher in non‐calcareous than in calcareous soils. CONCLUSION Soil application of fertilizer P and Zn, in soils with low levels of available Zn, should not only aim at increasing the available P and Zn levels but also balancing them at the appropriate Olsen P/Zn DTPA ratio, which was found to lie in the 30–60 range in the present study. © 2020 Society of Chemical Industry
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Claims 7
Claim · model-written summary
Soil P application generally increased aerial dry matter yield of maize.
- Treatment
- Soil P applicatione0
- Outcome
- aerial dry matter (ADM) yielde0
- Direction
- increasede0
- Setting
- Mediterranean regiont0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil P application generally increased aerial dry matter (ADM) yield”
t0“maize in agricultural soils of the Mediterranean region”
Claim · model-written summary
Zn increased ADM yield of maize mostly when applied in combination with P.
- Treatment
- Zne0
- Outcome
- ADM yielde0
- Direction
- increasede0
- Qualifier
- mostly when applied in combination with Pe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn increased ADM yield mostly when applied in combination with P”
t0“maize in agricultural soils of the Mediterranean region”
Claim · model-written summary
The sole application of Zn increased maize yield only in a soil with high Olsen P (28 mg kg-1) and low Zn DTPA (0.36 mg kg-1).
- Treatment
- sole application of Zne0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- only in a soil with a highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the sole application of Zn increased yield only in a soil with a high”
t0“maize in agricultural soils of the Mediterranean region”
Claim · model-written summary
The increase in ADM yield from optimal P and/or Zn application was modest in soils with an Olsen P/Zn DTPA ratio of 30-60 and Olsen P above 14 mg kg-1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in ADM yield resulting from optimal application of P and/or Zn to the soil was modest”
t0“maize in agricultural soils of the Mediterranean region”
Claim · model-written summary
Zinc uptake by control maize plants was correlated with the Zn DTPA of the soil.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc uptake by the control plants was correlated with the Zn”
t0“maize in agricultural soils of the Mediterranean region”
Claim · model-written summary
For a given Zn DTPA value, plant available Zn was higher in non-calcareous than in calcareous soils.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level of plant available Zn was higher in non‐calcareous than in calcareous soils”
t0“maize in agricultural soils of the Mediterranean region”
Claim · model-written summary
Fertilizer P and Zn in low-Zn soils should aim at balancing available P and Zn at an Olsen P/Zn DTPA ratio of 30-60.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but also balancing them at the appropriate Olsen P/Zn DTPA ratio, which was found to lie in the 30–60 range”
t0“maize in agricultural soils of the Mediterranean region”
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