Abstract
Selection of suitable tillage and application of optimal nitrogen fertilizer are essential to achieve optimal efficiency in crop management. In order to investigate the effect of tillage and nitrogen fertilizer on photosynthetic pigments and quantitative and qualitative traits of corn grain, an experiment was conducted in the research farm of Islamic Azad University, Chalous Branch, Mazandaran Province, Iran, in 2016 and 2017. Experimental factors were tillage at three levels, including no-tillage (NT), conservation tillage (MT), and conventional tillage (CT) in the main plot, and nitrogen fertilizer at four levels (no nitrogen fertilizer application and 33, 66, and 100% of the recommended amount of nitrogen fertilizer) in a subplot. The results showed that, in tillage treatments, increasing nitrogen fertilizer application increased photosynthetic pigments. Carotenoids and chlorophyll b were not significantly different in CT and MT treatments. Nitrogen and grain protein, yield components, and biological yield increased with the increasing use of recommended nitrogen fertilizer. The highest grain and biological yields in MT in the second year were observed at 11633.15 and 16644.16 kg·ha1, respectively. Grain and biological yield in the second year than the first year were further increased in NT and MT treatments compared to CT. Yield in MT and NT treatments improves over time. Due to the time limit in land preparation in the study area, the use of MT with 100 and 66% of the recommended nitrogen fertilizer can replace CT in the area.
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Claims 9
Claim · model-written summary
In tillage treatments, increasing nitrogen fertilizer application increased corn photosynthetic pigments.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- increasing nitrogen fertilizer applicatione1
- Outcome
- photosynthetic pigmentse1
- Direction
- increasede1
- Qualifier
- in tillage treatmentse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e1“in tillage treatments, increasing nitrogen fertilizer application increased photosynthetic pigments”
Claim · model-written summary
Carotenoids and chlorophyll b did not differ significantly between conventional and conservation tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- MT treatmentse2
- Outcome
- Carotenoids and chlorophyll be2
- Direction
- no_changeinferrede2
- Comparator
- CTe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e2“Carotenoids and chlorophyll b were not significantly different in CT and MT treatments”
Claim · model-written summary
Nitrogen and grain protein of corn increased with increasing use of recommended nitrogen fertilizer.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing use of recommended nitrogen fertilizere3
- Outcome
- Nitrogen and grain proteine3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e3“Nitrogen and grain protein, yield components, and biological yield increased with the increasing use of recommended nitrogen fertilizer”
Claim · model-written summary
Yield components and biological yield of corn increased with increasing use of recommended nitrogen fertilizer.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing use of recommended nitrogen fertilizere3
- Outcome
- yield components, and biological yielde3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e3“Nitrogen and grain protein, yield components, and biological yield increased with the increasing use of recommended nitrogen fertilizer”
Claim · model-written summary
Grain yield of corn in MT in the second year was highest at 11633.15 kg·ha1.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- MTe4
- Outcome
- grain and biological yieldse4
- Direction
- higheste4
- Value
- 11633.15e4
- Qualifier
- in MT in the second yeare4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e4“The highest grain and biological yields in MT in the second year were observed at 11633.15 and 16644.16 kg·ha1, respectively”
Claim · model-written summary
Biological yield of corn in MT in the second year was highest at 16644.16 kg·ha1.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- MTe4
- Outcome
- biological yieldse4
- Direction
- higheste4
- Value
- 16644.16e4
- Qualifier
- in MT in the second yeare4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e4“The highest grain and biological yields in MT in the second year were observed at 11633.15 and 16644.16 kg·ha1, respectively”
Claim · model-written summary
Grain and biological yield of corn increased further in NT and MT compared with CT in the second year relative to the first year.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- NT and MT treatmentse5
- Outcome
- Grain and biological yielde5
- Direction
- increasede5
- Qualifier
- in the second year than the first yeare5
- Comparator
- CTe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e5“Grain and biological yield in the second year than the first year were further increased in NT and MT treatments compared to CT”
Claim · model-written summary
Yield of corn in MT and NT treatments improved over time.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- MT and NT treatmentse6
- Outcome
- Yielde6
- Direction
- improvese6
- Qualifier
- over timee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e6“Yield in MT and NT treatments improves over time”
Claim · model-written summary
The authors recommend that MT with 100 and 66% of the recommended nitrogen fertilizer can replace CT in the study area.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- the use of MT with 100 and 66% of the recommended nitrogen fertilizere7
- Comparator
- CTe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigments and quantitative and qualitative traits of corn grain”
e7“the use of MT with 100 and 66% of the recommended nitrogen fertilizer can replace CT in the area”
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