Abstract
A field experiment was conducted during the summer season of 2000-2001 at the Vegetable Research Farm of Indian Agricultural Research Institute (I.A.R.I.), New Delhi (India) to test the efficacy of three Azotobacter strains as a potential supplement to nitrogenous fertilizer in improving growth and yield of onion cv. Pusa Madhvi. The treatments consisted of factorial combination of four levels of nitrogen (0, 25, 50 and 75 kg N ha -1 ) and three Azotobacter strains (CBD-15, AS-4 and M-4) with two uninoculated controls one with full dose of N (100 kg ha -1 ) and the other without NPK. Application of 75 kg N ha -1 along with inoculation of CBD-15 was found to have significantly increased most of the growth and yield parameters, soil available nitrogen, and nitrogen content in the bulb followed by M-4 inoculation as compared to application of full dose of nitrogen without the inoculation. Days to bulb initiation were significantly reduced due to inoculation with CBD-15 or M-4 along with 50 kg N ha -1 whereas days to bulb maturity were significantly reduced due to inoculation with any of the strains along with the same N rate (50 kg ha -1 ) as compared to application of full dose of nitrogen without the inoculation. The finding demonstrated a saving of 50 kg N ha -1 without significantly affecting yield and an average increase of 13.5% marketable yield due to Azotobacter inoculation in the presence of 75 kg N ha -1 .
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Claims 5
Claim · model-written summary
Application of 75 kg N ha-1 with CBD-15 inoculation significantly increased most growth and yield parameters, soil available N and bulb N, compared with full-dose nitrogen without inoculation.
- Taxon
- onion (Allium cepa L.)
Allium cepat0 - Treatment
- Application of 75 kg N ha -1 along with inoculation of CBD-15e1
- Interactor
- CBD-15e1symbiont
- Outcome
- most of the growth and yield parameters, soil available nitrogen, and nitrogen content in the bulbe1
- Direction
- significantly increasede1
- Comparator
- application of full dose of nitrogen without the inoculatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onion (Allium cepa L.)”
e1“Application of 75 kg N ha -1 along with inoculation of CBD-15 was found to have significantly increased most of the growth and yield parameters, soil available nitrogen, and nitrogen content in the bulb followed by M-4 inoculation as compared to application of full dose of nitrogen without the inoculation”
Claim · model-written summary
Inoculation with CBD-15 or M-4 with 50 kg N ha-1 significantly reduced days to bulb initiation.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- inoculation with CBD-15 or M-4 along with 50 kg N ha -1e2
- Interactor
- CBD-15e2symbiont
- Second interactor
- M-4e2symbiont
- Outcome
- Days to bulb initiatione2
- Direction
- significantly reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onion (Allium cepa L.)”
e2“Days to bulb initiation were significantly reduced due to inoculation with CBD-15 or M-4 along with 50 kg N ha -1”
Claim · model-written summary
Inoculation with any strain along with 50 kg N ha-1 significantly reduced days to bulb maturity, compared with full-dose nitrogen without inoculation.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- inoculation with any of the strains along with the same N rate (50 kg ha -1 )e3
- Outcome
- days to bulb maturitye3
- Direction
- significantly reducede3
- Comparator
- application of full dose of nitrogen without the inoculatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onion (Allium cepa L.)”
e3“days to bulb maturity were significantly reduced due to inoculation with any of the strains along with the same N rate (50 kg ha -1 ) as compared to application of full dose of nitrogen without the inoculation”
Claim · model-written summary
A saving of 50 kg N ha-1 was achieved without significantly affecting yield.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- 50 kg N ha -1e4
- Outcome
- yielde4
- Direction
- without significantly affectinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onion (Allium cepa L.)”
e4“The finding demonstrated a saving of 50 kg N ha -1 without significantly affecting yield”
Claim · model-written summary
Azotobacter inoculation with 75 kg N ha-1 gave an average 13.5% increase in marketable onion yield.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- Azotobacter inoculation in the presence of 75 kg N ha -1e5
- Interactor
- Azotobacter
Azotobactere5symbiont - Outcome
- marketable yielde5
- Direction
- increasee5
- Value
- 13.5%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“onion (Allium cepa L.)”
e5“an average increase of 13.5% marketable yield due to Azotobacter inoculation in the presence of 75 kg N ha -1”
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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.