Abstract
Abstract: Results from an international stationary field trial (ISDV) have been analyzed for effects of increasing nitrogen doses on yield of corn. Effects of increasing nitrogen doses and harvest residues on corn yield were assessed in a three-crop rotation of corn, soybean and wheat. The trial had nine variants, six with and three without plowing under of harvest residues. The trial had been established on a calcareous chernozem soil, at Rimski Šančevi experiment field of Institute of Field and Vegetable Crops, Novi Sad. This paper reviews 3-year average yields (one rotations) of two currently tested corn hybrids, NS 510 and NS 6010. The average yield of grain obtained in the variants with plowed under harvest residues was 9.80 t ha-1. It was higher by 3.28 t ha-1 than the average yield obtained in the fertilized variants that received no harvest residues. On average for both analyzed hybrids, the highest average yield (11.67 t ha-1) was achieved in the fertilization variant with 150 kg ha-1 of nitrogen combined with plowing under of harvest residues. The hybrid NS 6010 had a statistically highly significant yield in relation to the other hybrid, NS 510. In the case of individual hybrids and their average, in variants both with and without plowed under harvest residues, the increase of grain yield in response to the increasing nitrogen doses created a quadratic regression curve. On average for the two hybrids, plowed under harvest residues increased the yield of corn grain in the control variant by 2780 kg ha-1.In the comparable variants, the effect of long-term plowing under of harvest residues on grain yield of corn ranged from only 2450 kg of grain (in the case of the hybrid NS 510 in the variant with 90 kg N ha-1) to a amount of 4180 kg ha-1 (in the case of the hybrid NS 510 fertilized with 150 kg N ha-1). Key words: corn, nitrogen, fertilization, crop residues, yield
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Claims 7
Claim · model-written summary
Residue incorporation yielded 9.80 t ha-1, 3.28 t ha-1 above fertilized variants without residues.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- plowed under harvest residuese0
- Outcome
- yield of graine0
- Direction
- highere0
- Value
- 9.80 t ha-1e0
- Qualifier
- 3.28 t ha-1e0
- Comparator
- fertilized variants that received no harvest residuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average yield of grain obtained in the variants with plowed under harvest residues was 9.80 t ha-1. It was higher by 3.28 t ha-1 than the average yield obtained in the fertilized variants that received no harvest residues.”
t0“corn”
Claim · model-written summary
The highest mean yield was 11.67 t ha-1 with 150 kg ha-1 nitrogen and incorporated residues.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- 150 kg ha-1 of nitrogen combined with plowing under of harvest residuese0
- Outcome
- average yielde0
- Direction
- higheste0
- Value
- 11.67 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest average yield (11.67 t ha-1) was achieved in the fertilization variant with 150 kg ha-1 of nitrogen combined with plowing under of harvest residues”
t0“corn”
Claim · model-written summary
NS 6010 had statistically highly significant yield relative to NS 510; direction was unstated.
- Taxon
- cornZea mays subsp. mayst0
- Material
- NS 6010e0
- Outcome
- yielde0
- Comparator
- NS 510e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid NS 6010 had a statistically highly significant yield in relation to the other hybrid, NS 510.”
t0“corn”
Claim · model-written summary
Grain yield followed a quadratic response to increasing nitrogen dose with and without residues.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- increasing nitrogen dosese0
- Outcome
- grain yielde0
- Direction
- increasee0
- Qualifier
- quadratic regression curvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in variants both with and without plowed under harvest residues, the increase of grain yield in response to the increasing nitrogen doses created a quadratic regression curve”
t0“corn”
Claim · model-written summary
Residue incorporation increased control yield by 2780 kg ha-1.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- plowed under harvest residuese0
- Outcome
- yield of corn graine0
- Direction
- increasede0
- Value
- 2780 kg ha-1e0
- Comparator
- control variante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plowed under harvest residues increased the yield of corn grain in the control variant by 2780 kg ha-1”
t0“corn”
Claim · model-written summary
For NS 510 at 90 kg N ha-1, residue incorporation added 2450 kg of grain.
- Taxon
- cornZea mays subsp. mayse0
- Material
- NS 510e0
- Treatment
- long-term plowing under of harvest residuese0
- Outcome
- grain yield of corne0
- Direction
- increaseinferrede0
- Value
- 2450 kg of graine0
- Qualifier
- 90 kg N ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of long-term plowing under of harvest residues on grain yield of corn ranged from only 2450 kg of grain (in the case of the hybrid NS 510 in the variant with 90 kg N ha-1) to a amount of 4180 kg ha-1”
t0“corn”
Claim · model-written summary
For NS 510 at 150 kg N ha-1, residue incorporation added 4180 kg ha-1.
- Taxon
- cornZea mays subsp. mayse0
- Material
- NS 510e0
- Treatment
- long-term plowing under of harvest residuese0
- Outcome
- grain yield of corne0
- Direction
- increaseinferrede0
- Value
- 4180 kg ha-1e0
- Qualifier
- 150 kg N ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of long-term plowing under of harvest residues on grain yield of corn ranged from only 2450 kg of grain (in the case of the hybrid NS 510 in the variant with 90 kg N ha-1) to a amount of 4180 kg ha-1 (in the case of the hybrid NS 510 fertilized with 150 kg N ha-1)”
t0“corn”
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