Abstract
Two field experiments were conducted at the Experimental Farm of the Faculty of Agriculture, Tanta during the winter seasons of 1995/96 and 1996/97, to study the effect of some nitrogen and sulphur sources on plant growth, yield and quality of onion. Nitrogen was supplied at level of 100 kg/fed. from four sources, i.e., urea, ammonium, sulphate, ammonium nitrate and calcium nitrate, while sulphur was supplied as a sulphur powder 50 and 100 kg/fed. or ammonium thiosulphate (ATS) 2 and 4 kg/fed. Results revealed that, ammonium nitrate increased average bulb weight while calcium nitrate increased the percentage of bolting plants. Addition of sulphur at 50 or 100 kg increased the yield of onion. Results showed also that NO3-N was more accumulated in green leaves of onion than in its bulbs. The NO3-N content in both bulbs and leaves was affected significantly by the nitrogen and sulphur sources. Ammonium sulphate as nitrogen source lead to less nitrate accumulation in onion plants followed by ammonium nitrate and urea, while calcium nitrate caused increasing accumulation of NO3-N in plants. Sulphur treatment decreased the NO3-N content of onion plants. Values of the interaction showed that ammonium sulphate was more effective on decreasing nitrate accumulation in the presence of sulphur treatments.
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Claims 9
Claim · model-written summary
Ammonium nitrate increased mean bulb weight.
- Taxon
- ONION
Allium cepat0 - Treatment
- ammonium nitratee0
- Outcome
- average bulb weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“ammonium nitrate increased average bulb weight”
Claim · model-written summary
Calcium nitrate increased the share of bolting plants.
- Taxon
- ONIONAllium cepat0
- Treatment
- calcium nitratee0
- Outcome
- percentage of bolting plantse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“calcium nitrate increased the percentage of bolting plants”
Claim · model-written summary
Sulphur at 50 or 100 kg increased onion yield.
- Taxon
- ONIONAllium cepat0
- Treatment
- sulphur at 50 or 100 kge0
- Outcome
- yield of onione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“Addition of sulphur at 50 or 100 kg increased the yield of onion”
Claim · model-written summary
Nitrate accumulated more in green leaves than bulbs.
- Taxon
- ONIONAllium cepat0
- Organ / stage
- green leavese0
- Outcome
- NO3-Ne0
- Direction
- more accumulatede0
- Comparator
- bulbse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“NO3-N was more accumulated in green leaves of onion than in its bulbs”
Claim · model-written summary
Nitrogen and sulphur sources significantly affected nitrate content in bulbs and leaves.
- Taxon
- ONIONAllium cepat0
- Treatment
- nitrogen and sulphur sourcese0
- Outcome
- NO3-N content in both bulbs and leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“NO3-N content in both bulbs and leaves was affected significantly by the nitrogen and sulphur sources”
Claim · model-written summary
Ammonium sulphate led to the least nitrate accumulation, followed by ammonium nitrate and urea.
- Taxon
- ONIONAllium cepat0
- Treatment
- Ammonium sulphatee0
- Outcome
- nitrate accumulation in onion plantse0
- Direction
- lesse0
- Comparator
- ammonium nitrate and ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“Ammonium sulphate as nitrogen source lead to less nitrate accumulation in onion plants followed by ammonium nitrate and urea”
Claim · model-written summary
Calcium nitrate increased plant nitrate accumulation.
- Taxon
- ONIONAllium cepat0
- Treatment
- calcium nitratee0
- Outcome
- accumulation of NO3-N in plantse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“calcium nitrate caused increasing accumulation of NO3-N in plants”
Claim · model-written summary
Sulphur treatment decreased nitrate content.
- Taxon
- ONIONAllium cepat0
- Treatment
- Sulphur treatmente0
- Outcome
- NO3-N content of onion plantse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“Sulphur treatment decreased the NO3-N content of onion plants”
Claim · model-written summary
Ammonium sulphate was more effective at decreasing nitrate accumulation with sulphur treatment.
- Taxon
- ONIONAllium cepat0
- Treatment
- ammonium sulphatee0
- Outcome
- nitrate accumulatione0
- Direction
- decreasinge0
- Qualifier
- in the presence of sulphur treatmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION (ALLIUM CEPA, L.)”
e0“ammonium sulphate was more effective on decreasing nitrate accumulation in the presence of sulphur treatments”
The same questions in other papers
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See all 8 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.