Abstract
An investigation entitled "Effect of different levels of fertilizers with organic sources on growth, yield and quality of onion (Allium cepa L.)" was undertaken at the experimental farm, Department of Horticulture, VNMKV, Parbhani, Maharashtra, in the late Kharif season of 2020–21 and 2021–22. The present investigation was laid out in a factorial randomized block design (FRBD) with three different levels of recommended dose of fertilizers (RDF): F1: RDF 80% (80:40:40 NPK kg/ha), F2: RDF 100% (100:50:50 NPK kg/ha) and F3: RDF 120% (120:60:60 NPK kg/ha) with six levels of organic sources, namely, S0 : Control, S1 : Biomix 10 kg/ha, S2 : Biomix 12.5 kg/ha, S3 : Biomix 15 kg/ha, S4 : Humic acid 05 kg/ha and S5 : Humic acid 10 kg/ha comprising eighteen treatments and replicated thrice. The aim of this work is to study the effect of different levels of RDF and organic sources on the bulb quality and storage quality of onions (Allium cepa L.). The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%). Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha. In five months of storage studies, the mean minimum physiological loss in weight (18.47%) at ambient storage was observed under 80:40:40 NPK kg/ha, and the maximum total soluble solids (%) were recorded at 120:60:60 NPK kg/ha. During a five-month storage study, the mean minimum PLW (18.55%) at ambient storage was recorded under biomix at 15 kg/ha. The mean maximum total soluble solids were found after humic acid treatment (10 kg/ha) in the fifth month of storage.
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Claims 16
Claim · model-written summary
Under 120% RDF, onion bulb chlorophyll content had a higher mean value of 63.44 SPAD value.
- Taxon
- Onions
Allium cepat0 - Organ / stage
- bulbe0
- Treatment
- 120% RDFe0
- Outcome
- chlorophyll contente0
- Direction
- highere0
- Value
- 63.44 SPAD valuee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%).”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Under 120% RDF, onion bulb ascorbic acid content had a higher mean value of 11.71 mg/100 g.
- Taxon
- Onions
Allium cepat0 - Organ / stage
- bulbe0
- Treatment
- 120% RDFe0
- Outcome
- ascorbic acid contente0
- Direction
- highere0
- Value
- 11.71 mg/100 ge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%).”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Under 120% RDF, onion bulb total soluble solids had a higher mean value of 12.23%.
- Taxon
- Onions
Allium cepat0 - Organ / stage
- bulbe0
- Treatment
- 120% RDFe0
- Outcome
- total soluble solidse0
- Direction
- highere0
- Value
- 12.23%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%).”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Under 120% RDF, onion bulb reducing sugar had a higher mean value of 2.33%.
- Taxon
- Onions
Allium cepat0 - Organ / stage
- bulbe0
- Treatment
- 120% RDFe0
- Outcome
- reducing sugare0
- Direction
- highere0
- Value
- 2.33%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%).”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Under 120% RDF, onion bulb non-reducing sugar had a higher mean value of 5.27%.
- Taxon
- Onions
Allium cepat0 - Organ / stage
- bulbe0
- Treatment
- 120% RDFe0
- Outcome
- non-reducing sugare0
- Direction
- highere0
- Value
- 5.27%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%).”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Under 120% RDF, onion bulb total sugar had a higher mean value of 7.60%.
- Taxon
- Onions
Allium cepat0 - Organ / stage
- bulbe0
- Treatment
- 120% RDFe0
- Outcome
- total sugare0
- Direction
- highere0
- Value
- 7.60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The onion bulb produced under 120% RDF has recorded the higher mean values of the quality parameters, viz., chlorophyll content (63.44 SPAD value), ascorbic acid content (11.71 mg/100 g), total soluble solids (12.23%), reducing sugar (2.33%), non-reducing sugar (5.27%) and total sugar (7.60%).”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Humic acid at 10 kg/ha gave the highest mean onion chlorophyll content of 59.66 SPAD value.
- Taxon
- Onions
Allium cepat0 - Treatment
- humic acid at 10 kg/hae0
- Outcome
- chlorophyll contente0
- Direction
- higheste0
- Value
- 59.66 SPAD valuee0
- Comparator
- organic sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Humic acid at 10 kg/ha gave the highest mean onion total soluble solids of 11.91%.
- Taxon
- Onions
Allium cepat0 - Treatment
- humic acid at 10 kg/hae0
- Outcome
- total soluble solidse0
- Direction
- higheste0
- Value
- 11.91%e0
- Comparator
- organic sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Humic acid at 10 kg/ha gave the highest mean onion reducing sugar of 2.29%.
- Taxon
- Onions
Allium cepat0 - Treatment
- humic acid at 10 kg/hae0
- Outcome
- reducing sugare0
- Direction
- higheste0
- Value
- 2.29%e0
- Comparator
- organic sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Humic acid at 10 kg/ha gave the highest mean onion non-reducing sugar of 5.03%.
- Taxon
- Onions
Allium cepat0 - Treatment
- humic acid at 10 kg/hae0
- Outcome
- non-reducing sugare0
- Direction
- higheste0
- Value
- 5.03%e0
- Comparator
- organic sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Humic acid at 10 kg/ha gave the highest mean onion total sugar of 7.32%.
- Taxon
- Onions
Allium cepat0 - Treatment
- humic acid at 10 kg/hae0
- Outcome
- total sugare0
- Direction
- higheste0
- Value
- 7.32%e0
- Comparator
- organic sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Biomix at 15 kg/ha gave the highest ascorbic acid content, 10.89 mg/100 g.
- Taxon
- Onions
Allium cepat0 - Treatment
- biomix 15 kg/hae0
- Outcome
- ascorbic acide0
- Direction
- higheste0
- Value
- 10.89 mg/100 ge0
- Comparator
- organic sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Among the organic sources, humic acid at 10 kg/ha had the highest mean chlorophyll content (59.66 SPAD value), total soluble solids (11.91%), reducing sugar (2.29%), non-reducing sugar (5.03%), and total sugar (7.32%), with the exception of ascorbic acid (10.89 mg/100 g), which was highest at biomix 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
After five months of ambient storage, 80:40:40 NPK kg/ha gave minimum physiological loss in weight of 18.47%.
- Taxon
- Onions
Allium cepat0 - Treatment
- 80:40:40 NPK kg/hae0
- Outcome
- physiological loss in weighte0
- Direction
- minimume0
- Value
- 18.47%e0
- Setting
- ambient storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“In five months of storage studies, the mean minimum physiological loss in weight (18.47%) at ambient storage was observed under 80:40:40 NPK kg/ha, and the maximum total soluble solids (%) were recorded at 120:60:60 NPK kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
During five months of storage, 120:60:60 NPK kg/ha gave maximum total soluble solids.
- Taxon
- Onions
Allium cepat0 - Treatment
- 120:60:60 NPK kg/hae0
- Outcome
- total soluble solidse0
- Direction
- maximume0
- Qualifier
- five months of storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“In five months of storage studies, the mean minimum physiological loss in weight (18.47%) at ambient storage was observed under 80:40:40 NPK kg/ha, and the maximum total soluble solids (%) were recorded at 120:60:60 NPK kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Biomix at 15 kg/ha gave minimum PLW of 18.55% during ambient storage.
- Taxon
- Onions
Allium cepat0 - Treatment
- biomix at 15 kg/hae0
- Outcome
- PLWe0
- Direction
- minimume0
- Value
- 18.55%e0
- Setting
- ambient storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“During a five-month storage study, the mean minimum PLW (18.55%) at ambient storage was recorded under biomix at 15 kg/ha.”
t0“Onions (Allium cepa L.)”
Claim · model-written summary
Humic acid treatment at 10 kg/ha gave maximum total soluble solids in the fifth storage month.
- Taxon
- Onions
Allium cepat0 - Treatment
- humic acid treatment (10 kg/ha)e0
- Outcome
- total soluble solidse0
- Direction
- maximume0
- Qualifier
- fifth month of storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The mean maximum total soluble solids were found after humic acid treatment (10 kg/ha) in the fifth month of storage.”
t0“Onions (Allium cepa L.)”
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