Abstract
Two field experiments were carried out at the Experimental Farm of Sakha Agricultural Research Station in Kafr El-Sheikh Governorate at North Nile Delta Region. The experiments were conducted to study the response of onion to nitrogen fertilizer levels under different bio-organic fertilizers (compost tea and biofertilizer) as well as their interaction, on the growth and onion bulbs yield and its quality as well as storability of onion bulbs during the two successive winter seasons of 2010/2011 and 2011/2012. A split-split plot design with three replicates was used in this study. The main plots were designated to the three mineral nitrogen fertilizer levels (60, 90 and 120 kg N fad.-1), whereas foliar spraying treatments with compost tea at the same dose, 20 L fad.-1 (spraying with water; foliar spraying at 40 days after transplanting (DAT); foliar spraying at 40 and 60 DAT; foliar spraying at 40, 60 and 80 DAT and soil application, 30 DAT at rate of 30 L fad.-1) were randomly distributed in sub plots. While uninoculated and Inoculation with di-nitrogen fixing bacteria (Azotobacter and Azospirilium) were randomly distributed in the sub-sub plots. The obtained results could be summarized as follow: The two higher nitrogen levels (90 and 120kg N fad.-1) achieved a significant increase in vegetative growth characters (plant height, plant fresh weight, leaves dry weight/plant, bulb dry weight, plant dry weight and bulb diameter) as well as bulbs yield and quality (marketable and total bulbs yield as well as bulb diameter) as compared to the lower nitrogen rate (60 kg N fad.-1) in both seasons. The lower level of nitrogen (60 kg N fad.-1) resulted in a significant increase in TSS and dry matter % in addition to decrease weight loss% of onion bulbs at different storage periods in the two seasons. Growth and onion bulbs yield and its quality were highest due to application of compost tea on thrice than twice batches at the same dose and other treatments. The lowest values of bulbs weight loss% at 6 months were obtained under the application of compost tea on thrice batches. The effect of bio-fertilizer in plant height, Leaves dry weight/plant, bulb dry weight, plant dry weight, bulb diameter and bulb weight as well as bulb quality was evident in both seasons. In general, inoculation with Azotobacter and Azospirilium possitively increased all the previous characters. Total bulbs yield increased above 4.2 % in the plots treated by bio-fertilizer as compared with uninoculated treatment. Bio-fertilizer exert a significant effect on total weight loss of onion bulbs during different storage periods in the two seasons, where the lowest values were recorded with Azotobacter and Azospirilium inoculation. The interaction between mineral nitrogen and compost tea treatments had a significant effect on most studied characters. It is clear that the application of 90kg N fad.-1x foliar spraying with compost tea at 40, 60 and 80 DAT treatments produced the highest values of these traits in both seasons.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
Nitrogen at 90 and 120 kg N per fad. significantly increased plant height, plant fresh weight and leaves dry weight per plant compared with 60 kg N in both seasons.
- Taxon
- ONION
Allium cepat0 - Treatment
- 90 and 120kg N fad.-1e0
- Outcome
- plant height, plant fresh weight, leaves dry weight/plante0
- Direction
- significant increasee0
- Qualifier
- in both seasonse0
- Comparator
- the lower nitrogen rate (60 kg N fad.-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e0“The two higher nitrogen levels (90 and 120kg N fad.-1) achieved a significant increase in vegetative growth characters (plant height, plant fresh weight, leaves dry weight/plant, bulb dry weight, plant dry weight and bulb diameter) as well as bulbs yield and quality (marketable and total bulbs yield as well as bulb diameter) as compared to the lower nitrogen rate (60 kg N fad.-1) in both seasons”
Claim · model-written summary
Nitrogen at 90 and 120 kg N per fad. significantly increased bulb dry weight, plant dry weight and bulb diameter compared with 60 kg N in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- 90 and 120kg N fad.-1e0
- Outcome
- bulb dry weight, plant dry weight and bulb diametere0
- Direction
- significant increasee0
- Qualifier
- in both seasonse0
- Comparator
- the lower nitrogen rate (60 kg N fad.-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e0“The two higher nitrogen levels (90 and 120kg N fad.-1) achieved a significant increase in vegetative growth characters (plant height, plant fresh weight, leaves dry weight/plant, bulb dry weight, plant dry weight and bulb diameter) as well as bulbs yield and quality (marketable and total bulbs yield as well as bulb diameter) as compared to the lower nitrogen rate (60 kg N fad.-1) in both seasons”
Claim · model-written summary
Nitrogen at 90 and 120 kg N per fad. significantly increased marketable and total bulbs yield compared with 60 kg N in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- 90 and 120kg N fad.-1e0
- Outcome
- marketable and total bulbs yielde0
- Direction
- significant increasee0
- Qualifier
- in both seasonse0
- Comparator
- the lower nitrogen rate (60 kg N fad.-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e0“The two higher nitrogen levels (90 and 120kg N fad.-1) achieved a significant increase in vegetative growth characters (plant height, plant fresh weight, leaves dry weight/plant, bulb dry weight, plant dry weight and bulb diameter) as well as bulbs yield and quality (marketable and total bulbs yield as well as bulb diameter) as compared to the lower nitrogen rate (60 kg N fad.-1) in both seasons”
Claim · model-written summary
Lower nitrogen (60 kg N per fad.) was associated with a significant increase in TSS and dry matter percentage of onion bulbs.
- Taxon
- ONIONAllium cepat0
- Treatment
- 60 kg N fad.-1e2
- Outcome
- TSS and dry matter %e2
- Direction
- significant increasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e2“The lower level of nitrogen (60 kg N fad.-1) resulted in a significant increase in TSS and dry matter % in addition to decrease weight loss% of onion bulbs at different storage periods in the two seasons”
Claim · model-written summary
Lower nitrogen (60 kg N per fad.) was associated with decreased weight loss of onion bulbs during storage in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- 60 kg N fad.-1e2
- Outcome
- weight loss% of onion bulbse2
- Direction
- decreasee2
- Qualifier
- at different storage periods in the two seasonse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e2“The lower level of nitrogen (60 kg N fad.-1) resulted in a significant increase in TSS and dry matter % in addition to decrease weight loss% of onion bulbs at different storage periods in the two seasons”
Claim · model-written summary
Compost tea applied three times gave the highest onion bulb yield and quality compared with two applications at the same dose.
- Taxon
- ONIONAllium cepat0
- Treatment
- application of compost tea on thricee3
- Outcome
- bulbs yield and its qualitye3
- Direction
- higheste3
- Qualifier
- at the same dosee3
- Comparator
- twice batchese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e3“Growth and onion bulbs yield and its quality were highest due to application of compost tea on thrice than twice batches at the same dose and other treatments”
Claim · model-written summary
Compost tea applied three times was associated with the lowest onion bulb weight loss at 6 months.
- Taxon
- ONIONAllium cepat0
- Treatment
- application of compost tea on thrice batchese4
- Outcome
- bulbs weight loss%e4
- Direction
- loweste4
- Qualifier
- at 6 monthse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e4“The lowest values of bulbs weight loss% at 6 months were obtained under the application of compost tea on thrice batches”
Claim · model-written summary
Bio-fertilizer had an evident effect on plant height, leaves dry weight per plant and bulb dry weight in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- bio-fertilizere5
- Outcome
- plant height, Leaves dry weight/plant, bulb dry weighte5
- Qualifier
- in both seasonse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e5“The effect of bio-fertilizer in plant height, Leaves dry weight/plant, bulb dry weight, plant dry weight, bulb diameter and bulb weight as well as bulb quality was evident in both seasons”
Claim · model-written summary
Bio-fertilizer had an evident effect on plant dry weight, bulb diameter and bulb weight in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- bio-fertilizere5
- Outcome
- plant dry weight, bulb diameter and bulb weighte5
- Qualifier
- in both seasonse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e5“The effect of bio-fertilizer in plant height, Leaves dry weight/plant, bulb dry weight, plant dry weight, bulb diameter and bulb weight as well as bulb quality was evident in both seasons”
Claim · model-written summary
Bio-fertilizer had an evident effect on bulb quality in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- bio-fertilizere5
- Outcome
- bulb qualitye5
- Qualifier
- in both seasonse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e5“The effect of bio-fertilizer in plant height, Leaves dry weight/plant, bulb dry weight, plant dry weight, bulb diameter and bulb weight as well as bulb quality was evident in both seasons”
Claim · model-written summary
Inoculation with Azotobacter and Azospirillum increased all the measured characters of onion.
- Taxon
- ONIONAllium cepat0
- Treatment
- inoculation with Azotobacter and Azospiriliume6
- Interactor
- Azotobacter
Azotobactere6symbiont - Second interactor
- Azospiriliume6symbiont
- Outcome
- all the previous characterse6
- Direction
- increasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e6“In general, inoculation with Azotobacter and Azospirilium possitively increased all the previous characters”
Claim · model-written summary
Bio-fertilizer increased total onion bulb yield above 4.2% compared with uninoculated treatment.
- Taxon
- ONIONAllium cepat0
- Treatment
- bio-fertilizere7
- Outcome
- Total bulbs yielde7
- Direction
- increasede7
- Value
- above 4.2 %e7
- Comparator
- uninoculated treatmente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e7“Total bulbs yield increased above 4.2 % in the plots treated by bio-fertilizer as compared with uninoculated treatment”
Claim · model-written summary
Bio-fertilizer with Azotobacter and Azospirillum was associated with the lowest total weight loss of onion bulbs during storage.
- Taxon
- ONIONAllium cepat0
- Treatment
- Bio-fertilizere1
- Interactor
- AzotobacterAzotobactere1symbiont
- Second interactor
- Azospiriliume1symbiont
- Outcome
- total weight loss of onion bulbse1
- Direction
- loweste1
- Qualifier
- during different storage periods in the two seasonse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e1“Bio-fertilizer exert a significant effect on total weight loss of onion bulbs during different storage periods in the two seasons, where the lowest values were recorded with Azotobacter and Azospirilium inoculation”
Claim · model-written summary
The interaction of mineral nitrogen and compost tea had a significant effect on most studied onion characters.
- Taxon
- ONIONAllium cepat0
- Treatment
- interaction between mineral nitrogen and compost tea treatmentse1
- Outcome
- most studied characterse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e1“The interaction between mineral nitrogen and compost tea treatments had a significant effect on most studied characters”
Claim · model-written summary
90 kg N per fad. with foliar compost tea at 40, 60 and 80 days after transplanting gave the highest onion trait values in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- 90kg N fad.-1x foliar spraying with compost tea at 40, 60 and 80 DATe1
- Outcome
- values of these traitse1
- Direction
- higheste1
- Qualifier
- in both seasonse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ONION PRODUCTIVITY AND SOIL FERTILITY STATUS”
e1“It is clear that the application of 90kg N fad.-1x foliar spraying with compost tea at 40, 60 and 80 DAT treatments produced the highest values of these traits in both seasons”
The same questions in other papers
fertilization · quality: general · Allium cepa (onion)Positive and negative results
26 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
28 papers more in this group
See all 32 papers →inoculation · yield · Allium cepa (onion)Positive and negative results
81 papers in the same direction as this paper · 10 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
89 papers more in this group
See all 93 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.