Abstract
Crop density is a means that controls grain yield establishment. This study was focused on evaluating the effect of four crop densities (CD1—50,125 plants ha−1, CD2—59,523 plants ha−1, CD3—69,686 plants ha−1, and CD4—79,365 plants ha−1) on yield components, grain yield, sustainable yield index (SYI), and rain use efficiency (RUE) of the maize hybrids ZP 500, NS 5010, and AS 534 during 2016–2018. In 2017, due to unfavorable meteorological conditions, ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, SYI, and RUE were low compared to 2016 and 2018. The hybrid NS 5010 had the lowest ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, and SYI. Increasing crop density significantly decreased yield components and increased grain yield, SYI, and RUE. The lowest ear length was recorded in treatments CD3 and CD4, the lowest number of grains per ear, grain weight per ear, and 1000-grain weight in treatment CD4. However, the highest grain yield, SYI, and RUE were recorded in the CD4 treatment because the number of plants per unit area is an essential determinant of the final grain yield.
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Claims 10
Claim · model-written summary
In unfavorable 2017 conditions, ear length, number of grains per ear, grain weight per ear were low versus 2016 and 2018.
- Outcome
- ear length, number of grains per ear, grain weight per eare0
- Direction
- lowe0
- Comparator
- 2016 and 2018e0
- Setting
- 2017e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2017, due to unfavorable meteorological conditions, ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, SYI, and RUE were low compared to 2016 and 2018”
t0“Maize Hybrids”
Claim · model-written summary
In unfavorable 2017 conditions, 1000-grain weight, grain yield, SYI were low versus 2016 and 2018.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2017, due to unfavorable meteorological conditions, ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, SYI, and RUE were low compared to 2016 and 2018”
t0“Maize Hybrids”
Claim · model-written summary
In unfavorable 2017 conditions, RUE were low versus 2016 and 2018.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2017, due to unfavorable meteorological conditions, ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, SYI, and RUE were low compared to 2016 and 2018”
t0“Maize Hybrids”
Claim · model-written summary
NS 5010 had the lowest ear length, number of grains per ear, grain weight per ear.
- Material
- NS 5010e0
- Outcome
- ear length, number of grains per ear, grain weight per eare0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid NS 5010 had the lowest ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, and SYI”
t0“Maize Hybrids”
Claim · model-written summary
NS 5010 had the lowest 1000-grain weight, grain yield, and SYI.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid NS 5010 had the lowest ear length, number of grains per ear, grain weight per ear, 1000-grain weight, grain yield, and SYI”
t0“Maize Hybrids”
Claim · model-written summary
Increasing crop density decreased yield components.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing crop density significantly decreased yield components and increased grain yield, SYI, and RUE”
t0“Maize Hybrids”
Claim · model-written summary
Increasing crop density increased grain yield, SYI, and RUE.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing crop density significantly decreased yield components and increased grain yield, SYI, and RUE”
t0“Maize Hybrids”
Claim · model-written summary
CD3 and CD4 had the lowest ear length.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest ear length was recorded in treatments CD3 and CD4”
t0“Maize Hybrids”
Claim · model-written summary
CD4 had the lowest grain number per ear, grain weight per ear and 1000-grain weight.
- Treatment
- CD4e0
- Outcome
- number of grains per ear, grain weight per ear, and 1000-grain weighte0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest number of grains per ear, grain weight per ear, and 1000-grain weight in treatment CD4”
t0“Maize Hybrids”
Claim · model-written summary
CD4 had the highest grain yield, SYI and RUE.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest grain yield, SYI, and RUE were recorded in the CD4 treatment”
t0“Maize Hybrids”