Abstract
Abstract The deficiency of secondary and micronutrients negatively affects plant metabolic functions and reduces crop yields. These nutrients are applied in small quantities (<10 kg ha −1 ) and are physically blended or chemically fused with primary nutrients to enhance uniformity of application. A 3‐yr study (2012–2014) was conducted to evaluate the effects of fall or spring‐applied fertilizer N with or without P and N–P fertilizers containing S and Zn (blended or fused) on soil properties, leaf chlorophyll, and maize ( Zea mays L.) yield in Nebraska. Response variables were measured for additional 2 yr (2015–2016; residual years [RYs]). Soil Mehlich‐3 P was low (14 mg kg −1 ) at the onset of the experiment and adding P increased grain yield by 10% compared with N only treatment in 2013–2015. Grain yields were similar in treatments with S and Zn fused (9.7–12.4 Mg ha −1 ) or blended (9.7–12.2 Mg ha −1 ) in all years (2012–2016). A yield benefit of adding S and Zn was recorded only 1 yr (2015: the first RY) (12.3 and 11.6 Mg ha −1 in NP treatments with and without S and Zn). Except for 2012, all fertilized treatments had greater yields than the control in 2013–2016. The 2012 was a dry year, where yield was low across the treatments (1.6–2.1 Mg ha −1 ) suggesting minimal benefits of adding primary nutrients (N, P), let alone S or Zn, when moisture is limiting. It is warranted that blended and fused fertilizers are evaluated under specific conditions where soils are deficient in constituent nutrients.
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Claims 6
Claim · model-written summary
Adding P increased maize grain yield 10% versus N alone in 2013–2015.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adding P increased grain yield by 10% compared with N only treatment in 2013–2015”
e1“maize ( Zea mays L.) yield”
Claim · model-written summary
Maize grain yields were similar with fused and blended S and Zn fertilizers throughout 2012–2016.
- Treatment
- S and Zn fusede0
- Outcome
- Grain yieldse0
- Direction
- similare0
- Value
- 9.7–12.4 Mg ha −1e0
- Qualifier
- 9.7–12.2 Mg ha −1e0
- Comparator
- blendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were similar in treatments with S and Zn fused (9.7–12.4 Mg ha −1 ) or blended (9.7–12.2 Mg ha −1 ) in all years (2012–2016)”
e1“maize ( Zea mays L.) yield”
Claim · model-written summary
Adding S and Zn benefited maize yield only in 2015, the first residual year.
- Treatment
- adding S and Zne0
- Outcome
- yielde0
- Direction
- benefite0
- Value
- 12.3 and 11.6 Mg ha −1e0
- Qualifier
- only 1 yr (2015: the first RY)e0
- Comparator
- without S and Zne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A yield benefit of adding S and Zn was recorded only 1 yr (2015: the first RY) (12.3 and 11.6 Mg ha −1 in NP treatments with and without S and Zn)”
e1“maize ( Zea mays L.) yield”
Claim · model-written summary
Fertilized maize treatments yielded more than controls during 2013–2016.
- Treatment
- all fertilized treatmentse0
- Outcome
- yieldse0
- Direction
- greatere0
- Qualifier
- in 2013–2016e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Except for 2012, all fertilized treatments had greater yields than the control in 2013–2016”
e1“maize ( Zea mays L.) yield”
Claim · model-written summary
Maize yield was low across treatments in dry 2012.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2012 was a dry year, where yield was low across the treatments (1.6–2.1 Mg ha −1 )”
e1“maize ( Zea mays L.) yield”
Claim · model-written summary
The authors recommend evaluating blended and fused fertilizers on soils deficient in their constituent nutrients.
- Outcome
- blended and fused fertilizers are evaluated under specific conditions where soils are deficient in constituent nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blended and fused fertilizers are evaluated under specific conditions where soils are deficient in constituent nutrients”
e1“maize ( Zea mays L.) yield”
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