Abstract
This study examined nitrogen (N) uptake and distribution patterns in onion seed crops (Allium cepa L.) under varying urea application rates, 0, 50, 100, and 150 kg N/ha across two growing seasons. Using a complete randomised block design, the research determined the total nitrogen content in leaves, stems, and bulbs after 30 and 60 days of planting, as well as the soil nitrogen levels before and after harvesting. Results showed that increased levels of nitrogen application highly increase in nitrogen accumulation in all parts of the plant. At 60 days after planting the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%), stem (5.70% and 5.61%), and bulb (4.25% and 4.25%) for the years 2020 – 21 and 2021 – 22, respectively. This increased uptake was related to the highest yield of seeds of 774.67 g/plot and 1368.33 g/plot during the years. Post-harvest soil nitrogen levels were also highest at this treatment and were 172.51 and 162.28 kg/ha in 2020–21 and 2021–22, respectively, showing effective nitrogen retention. These results emphasise the need for specific nitrogen management practices, such as split application, to enhance nutrient uptake at crucial growth points. Through matching nitrogen application to the physiological requirement of the crop, this research is useful in increasing onion seed yield and in improving crop productivity and soil health in onion seed production.
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Claims 12
Claim · model-written summary
Higher nitrogen application increased nitrogen accumulation across plant parts.
- Taxon
- Onion Crop
Allium cepat0 - Treatment
- increased levels of nitrogen applicatione0
- Outcome
- nitrogen accumulation in all parts of the plante0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased levels of nitrogen application highly increase in nitrogen accumulation in all parts of the plant”
t0“Onion Crop”
Claim · model-written summary
At 60 days, leaf nitrogen was highest at 150 kg N/ha in 2020–21.
- Taxon
- Onion CropAllium cepat0
- Organ / stage
- leafe0
- Treatment
- 150 kg N/hae0
- Outcome
- leafe0
- Direction
- higheste0
- Value
- 6.23%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 60 days after planting the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%)”
t0“Onion Crop”
Claim · model-written summary
At 60 days, leaf nitrogen was highest at 150 kg N/ha in 2021–22.
- Taxon
- Onion CropAllium cepat0
- Organ / stage
- leafe0
- Treatment
- 150 kg N/hae0
- Outcome
- leafe0
- Direction
- higheste0
- Value
- 6.18%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 60 days after planting the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%)”
t0“Onion Crop”
Claim · model-written summary
At 60 days, stem nitrogen was highest at 150 kg N/ha in 2020–21.
- Taxon
- Onion CropAllium cepat0
- Organ / stage
- steme0
- Treatment
- 150 kg N/hae0
- Outcome
- steme0
- Direction
- higheste0
- Value
- 5.70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%), stem (5.70% and 5.61%)”
t0“Onion Crop”
Claim · model-written summary
At 60 days, stem nitrogen was highest at 150 kg N/ha in 2021–22.
- Taxon
- Onion CropAllium cepat0
- Organ / stage
- steme0
- Treatment
- 150 kg N/hae0
- Outcome
- steme0
- Direction
- higheste0
- Value
- 5.61%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%), stem (5.70% and 5.61%)”
t0“Onion Crop”
Claim · model-written summary
At 60 days, bulb nitrogen was highest at 150 kg N/ha in 2020–21.
- Taxon
- Onion CropAllium cepat0
- Organ / stage
- bulbe0
- Treatment
- 150 kg N/hae0
- Outcome
- bulbe0
- Direction
- higheste0
- Value
- 4.25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%), stem (5.70% and 5.61%), and bulb (4.25% and 4.25%)”
t0“Onion Crop”
Claim · model-written summary
At 60 days, bulb nitrogen was highest at 150 kg N/ha in 2021–22.
- Taxon
- Onion CropAllium cepat0
- Organ / stage
- bulbe0
- Treatment
- 150 kg N/hae0
- Outcome
- bulbe0
- Direction
- higheste0
- Value
- 4.25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 150 kg N/ha treatment had the highest nitrogen content in leaf (6.23% and 6.18%), stem (5.70% and 5.61%), and bulb (4.25% and 4.25%)”
t0“Onion Crop”
Claim · model-written summary
Seed yield was highest at 774.67 g/plot in the first year.
- Taxon
- Onion CropAllium cepat0
- Outcome
- yield of seedse0
- Direction
- higheste0
- Value
- 774.67 g/plote0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest yield of seeds of 774.67 g/plot and 1368.33 g/plot during the years”
t0“Onion Crop”
Claim · model-written summary
Seed yield was highest at 1368.33 g/plot in the second year.
- Taxon
- Onion CropAllium cepat0
- Outcome
- yield of seedse0
- Direction
- higheste0
- Value
- 1368.33 g/plote0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest yield of seeds of 774.67 g/plot and 1368.33 g/plot during the years”
t0“Onion Crop”
Claim · model-written summary
Postharvest soil nitrogen was highest at 150 kg N/ha, 172.51 kg/ha in 2020–21.
- Taxon
- Onion CropAllium cepat0
- Outcome
- Post-harvest soil nitrogen levelse0
- Direction
- higheste0
- Value
- 172.51e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-harvest soil nitrogen levels were also highest at this treatment and were 172.51 and 162.28 kg/ha in 2020–21 and 2021–22”
t0“Onion Crop”
Claim · model-written summary
Postharvest soil nitrogen was highest at 150 kg N/ha, 162.28 kg/ha in 2021–22.
- Taxon
- Onion CropAllium cepat0
- Outcome
- Post-harvest soil nitrogen levelse0
- Direction
- higheste0
- Value
- 162.28 kg/hae0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-harvest soil nitrogen levels were also highest at this treatment and were 172.51 and 162.28 kg/ha in 2020–21 and 2021–22”
t0“Onion Crop”
Claim · model-written summary
The authors recommend specific nitrogen management, such as split application, for nutrient uptake.
- Taxon
- Onion CropAllium cepat0
- Outcome
- split applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“specific nitrogen management practices, such as split application, to enhance nutrient uptake at crucial growth points”
t0“Onion Crop”
The same questions in other papers
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- no effect
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26 papers in the same direction as this paper · 3 in the opposite direction
- no effect
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See all 30 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.