Abstract
Tow field experiments were carried out at a private Farm at Wadi El-Mollak, Abo-Hammad District, Sharkia Governorate, Egypt during 2006 and 2007 summer seasons. The aim of this work was to study the response of three maize hybrids i.e. single cross 18, three way cross 310 and three way cross 320 to N fertilizer levels (50, 75, 100 and 125 kg N/fad). A split-plot design with three replicates was followed, the three maize hybrids were arranged at random in the main plots whereas, nitrogen fertilizer levels were occupied the sub-plots. The obtained results of the combined analysis of the two growing seasons could be summarized as follows: Highly significant differences were detected among the three tested maize hybrids in most the growth and yield characteristics. SC18 maize hybrid surpassed the other two hybrids in grain yield/fad as a result of its superiority in yield components i.e. ear length, number of grains/row, number of grains/ear and 100-grain weight. TWC 310 plants were superior in plant and ear heights. Both TWC 310 and TWC 320 had the largest leaf area/plant. The plants of both SC18 and TWC 320 gave the highest shelling percentage. The studied maize hybrids did not significantly differed in number of rows/ear. Each increment of N level up to 125 kg/fad resulted in a continuous and significant increase in plant height, leaf area/plant, ear length, number of grains/row, number of grains/ear, shelling percentage and grain yield/fad. Ear height, number of rows/ear and 100-grain weight were gradually increased with increasing N level up to 100 kg N/fad. The interaction between the two studied factors significantly affected leaf area/plant and grain yield/fad. Planting TWC 320 with application of 125 kg N/fad is the best to obtain the largest leaf area/plant whereas, planting SC18 with 100 or 125 kg N/fad is the best to obtain the highest grain yield/fad. Positive and significant correlation coefficients between maize grain yield on one hand and each ear length, number of grains/row and number of grains/ear on the other hand were observed, while positive and insignificant correlations were found between grain yield and other studied characters. The direct effect of ear length was 49.5% being higher than those of number of grains/ear and 100-grain weight which were 2.85 and 4.40% of grain yield variation, respectively.
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Claims 17
Claim · model-written summary
SC18 surpassed the other hybrids in grain yield and yield components.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SC18 maize hybrid surpassed the other two hybrids in grain yield/fad as a result of its superiority in yield components i.e. ear length, number of grains/row, number of grains/ear and 100-grain weight”
Claim · model-written summary
TWC 310 had superior plant and ear heights.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TWC 310 plants were superior in plant and ear heights”
t0“MAIZE”
Claim · model-written summary
TWC 310 and TWC 320 had the largest leaf area per plant.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both TWC 310 and TWC 320 had the largest leaf area/plant”
t0“MAIZE”
Claim · model-written summary
SC18 and TWC 320 had the highest shelling percentage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants of both SC18 and TWC 320 gave the highest shelling percentage”
t0“MAIZE”
Claim · model-written summary
The hybrids did not significantly differ in rows per ear.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The studied maize hybrids did not significantly differed in number of rows/ear”
t0“MAIZE”
Claim · model-written summary
Each nitrogen increase to 125 kg/fad significantly increased plant height, leaf area and ear length.
- Treatment
- Each increment of N level up to 125 kg/fade0
- Outcome
- plant height, leaf area/plant, ear lengthe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each increment of N level up to 125 kg/fad resulted in a continuous and significant increase in plant height, leaf area/plant, ear length, number of grains/row, number of grains/ear, shelling percentage and grain yield/fad”
t0“MAIZE”
Claim · model-written summary
Each nitrogen increase to 125 kg/fad significantly increased grains per row, grains per ear and shelling percentage.
- Treatment
- Each increment of N level up to 125 kg/fade0
- Outcome
- number of grains/row, number of grains/ear, shelling percentagee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each increment of N level up to 125 kg/fad resulted in a continuous and significant increase in plant height, leaf area/plant, ear length, number of grains/row, number of grains/ear, shelling percentage and grain yield/fad”
t0“MAIZE”
Claim · model-written summary
Each nitrogen increase to 125 kg/fad significantly increased grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each increment of N level up to 125 kg/fad resulted in a continuous and significant increase in plant height, leaf area/plant, ear length, number of grains/row, number of grains/ear, shelling percentage and grain yield/fad”
t0“MAIZE”
Claim · model-written summary
Ear height, rows per ear and 100-grain weight rose with nitrogen to 100 kg N/fad.
- Treatment
- increasing N level up to 100 kg N/fade0
- Outcome
- Ear height, number of rows/ear and 100-grain weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ear height, number of rows/ear and 100-grain weight were gradually increased with increasing N level up to 100 kg N/fad”
t0“MAIZE”
Claim · model-written summary
Hybrid and nitrogen level interacted significantly for leaf area and grain yield.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction between the two studied factors significantly affected leaf area/plant and grain yield/fad”
t0“MAIZE”
e1“response of three maize hybrids i.e.”
Claim · model-written summary
TWC 320 with 125 kg N/fad had the largest leaf area per plant.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting TWC 320 with application of 125 kg N/fad is the best to obtain the largest leaf area/plant”
t0“MAIZE”
Claim · model-written summary
SC18 with 100 or 125 kg N/fad gave the highest grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting SC18 with 100 or 125 kg N/fad is the best to obtain the highest grain yield/fad”
t0“MAIZE”
Claim · model-written summary
Grain yield correlated positively and significantly with ear length and grain counts.
- Organ / stage
- eare0
- Outcome
- grain yielde0
- Direction
- Positivee0
- Qualifier
- ear length, number of grains/row and number of grains/eare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Positive and significant correlation coefficients between maize grain yield on one hand and each ear length, number of grains/row and number of grains/ear on the other hand were observed”
Claim · model-written summary
Other studied traits had positive but insignificant correlations with grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive and insignificant correlations were found between grain yield and other studied characters”
t0“MAIZE”
Claim · model-written summary
Ear length had a direct effect of 49.5% of grain yield variation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The direct effect of ear length was 49.5% being higher than those of number of grains/ear and 100-grain weight which were 2.85 and 4.40% of grain yield variation, respectively”
t0“MAIZE”
Claim · model-written summary
Number of grains per ear accounted for 2.85% of grain yield variation.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of grains/ear and 100-grain weight which were 2.85 and 4.40% of grain yield variation, respectively”
t0“MAIZE”
Claim · model-written summary
100-grain weight accounted for 4.40% of grain yield variation.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100-grain weight which were 2.85 and 4.40% of grain yield variation, respectively”
t0“MAIZE”
The same questions in other papers
nitrogen · yield · Zea mays (maize)Positive and negative results
1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative
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- positive
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