Abstract
A field experiment was conducted at the Agronomy Department Farm, Faculty of Agriculture, Assiut University during 2015/2016 and 2016/2017 seasons to study the effect of preceding crop, rates and splitting of nitrogen fertilizer on bread wheat production and nitrogen use efficiency. The experiment was carried out in randomization complete block design (RCBD) using split-split plot arrangement with three replications. Cropping system (corn-clover-wheat and corn-fallow-wheat) were assigned in main-plots while nitrogen fertilizer rates (56.25, 75.00 and 93.75 kg N/fed) were allotted in sub-plots and splitting doses of nitrogen (two, three and four equal doses) were allocated in sub-sub plots. The obtained data showed that plant height, spike length, number of spikes/m2, number of grains/spike, weight of grains/spike, seed index, grain yield, straw yield and nitrogen use efficiency were significantly affected by cropping sequence in favor of planting wheat after clover (fahl berseem) in the two growing seasons except nitrogen use efficiency in the first season. Increasing nitrogen fertilizer rates resulted in significant increase in all previous traits except nitrogen use efficiency trait which was decreased by increasing nitrogen fertilizer rates in both seasons. Moreover, splitting nitrogen rates into four equal doses significantly increased all studied traits as compared to three or two equal splits in the two growing seasons. Also, all interactions had a significant effect on all studied traits in both seasons. The highest mean values of grain yield (27.47 and 28.22 ard/fed in the first and second seasons, respectively) were obtained from the sequence of corn-clover-wheat when received highest nitrogen rate (93.75 kg N/fed) which was applied at four equal doses.
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Claims 8
Claim · model-written summary
Wheat after clover had significantly greater height, spike traits, grain traits and grain and straw yield than the alternative sequence in both seasons.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- planting wheat after clover (fahl berseem)e0
- Outcome
- plant height, spike length, number of spikes/m2, number of grains/spike, weight of grains/spike, seed index, grain yield, straw yielde0
- Direction
- in favor ofe0
- Qualifier
- in the two growing seasonse0
- Comparator
- cropping sequencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height, spike length, number of spikes/m2, number of grains/spike, weight of grains/spike, seed index, grain yield, straw yield and nitrogen use efficiency were significantly affected by cropping sequence in favor of planting wheat after clover (fahl berseem) in the two growing seasons except nitrogen use efficiency in the first season.”
Claim · model-written summary
Wheat after clover significantly improved nitrogen use efficiency in the second season, with the first season excepted.
- Taxon
- wheatTriticum aestivume0
- Treatment
- planting wheat after clover (fahl berseem)e0
- Outcome
- nitrogen use efficiencye0
- Direction
- in favor ofe0
- Qualifier
- except nitrogen use efficiency in the first seasone0
- Comparator
- cropping sequencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen use efficiency were significantly affected by cropping sequence in favor of planting wheat after clover (fahl berseem) in the two growing seasons except nitrogen use efficiency in the first season.”
Claim · model-written summary
Higher nitrogen fertilizer rates significantly increased measured growth and yield traits in both seasons.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- Increasing nitrogen fertilizer ratese0
- Outcome
- all previous traitse0
- Direction
- increasee0
- Qualifier
- both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen fertilizer rates resulted in significant increase in all previous traits except nitrogen use efficiency trait which was decreased by increasing nitrogen fertilizer rates in both seasons.”
t0“Bread Wheat”
Claim · model-written summary
Higher nitrogen fertilizer rates decreased nitrogen use efficiency in both seasons.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- increasing nitrogen fertilizer ratese0
- Outcome
- nitrogen use efficiencye0
- Direction
- decreasede0
- Qualifier
- both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen use efficiency trait which was decreased by increasing nitrogen fertilizer rates in both seasons.”
t0“Bread Wheat”
Claim · model-written summary
Four equal nitrogen doses significantly increased all studied traits compared with two or three splits in both seasons.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- splitting nitrogen rates into four equal dosese0
- Outcome
- all studied traitse0
- Direction
- increasede0
- Qualifier
- two growing seasonse0
- Comparator
- three or two equal splitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“splitting nitrogen rates into four equal doses significantly increased all studied traits as compared to three or two equal splits in the two growing seasons.”
t0“Bread Wheat”
Claim · model-written summary
All tested factor interactions significantly affected every studied trait in both seasons.
- Taxon
- bread wheatTriticum aestivumt0
- Treatment
- all interactionse0
- Outcome
- all studied traitse0
- Qualifier
- both seasonse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all interactions had a significant effect on all studied traits in both seasons.”
t0“Bread Wheat”
Claim · model-written summary
The corn–clover–wheat sequence with 93.75 kg N/fed in four equal doses produced 27.47 ard/fed grain yield in the first season.
- Taxon
- wheatTriticum aestivume0
- Treatment
- corn-clover-wheate0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 27.47e0
- Qualifier
- firste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest mean values of grain yield (27.47 and 28.22 ard/fed in the first and second seasons, respectively) were obtained from the sequence of corn-clover-wheat when received highest nitrogen rate (93.75 kg N/fed) which was applied at four equal doses.”
Claim · model-written summary
The same combined treatment produced 28.22 ard/fed grain yield in the second season.
- Taxon
- wheatTriticum aestivume0
- Treatment
- corn-clover-wheate0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 28.22 ard/fede0
- Qualifier
- second seasonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest mean values of grain yield (27.47 and 28.22 ard/fed in the first and second seasons, respectively) were obtained from the sequence of corn-clover-wheat when received highest nitrogen rate (93.75 kg N/fed) which was applied at four equal doses.”
The same questions in other papers
fertilization · nutrient: efficiency · Triticum aestivum (wheat)Positive and negative results
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