Abstract
High levels of crop productivity cannot be sustained by chemical fertiliser application alone. In order to mitigate this, a 2-year study was conducted to test the effects of combined application of indigenous plant-growth-promoting rhizobacteria (PGPR) and chemical fertilisers on productivity of wheat and soil properties. Ten morphologically distinct indigenous PGPR isolates from wheat roots and rhizosphere were evaluated at Solan, Himachal Pradesh, India, during 2013–14. Three PGPR isolates (B2, SIR1 and BIS2) with maximum PGP traits were screened at different doses of nitrogen (N) and phosphorus (P) (80%, 60% and 40% of recommended fertiliser dose, RFD) under net-house conditions. Two isolates, B2 (Serratia sp.) and SIR1 (Bacillus subtilis), along with the optimum NP dose (i.e. 80% RFD) were selected for field experimentation, which was performed over two consecutive years, 2014–16. Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD. Soil properties in the terms of available N, P and potassium, microbial biomass carbon, soil enzyme activities and population of phosphate-solubilising bacteria in the wheat crop were significantly increased by the combined application of bacterial inoculants with 80% RFD of NP in both years over the uninoculated control. Therefore, the results revealed the potential of indigenous PGPR isolates to supplement ~20% of NP fertilisers without hampering the soil fertility and productivity of wheat.
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Claims 9
Claim · model-written summary
B2 plus 80% fertilizer significantly increased wheat wheat yield by 9.4% relative to uninoculated full fertilizer.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- 80% RDF of NP with PGPR (B2)e0
- Interactor
- Serratia sp.e1symbiont
- Outcome
- wheat yielde0
- Direction
- increasede0
- Value
- 9.4%e0
- Comparator
- uninoculated control with 100% RFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD.”
e1“B2 (Serratia sp.)”
Claim · model-written summary
B2 plus 80% fertilizer significantly increased wheat number of tillers per plant by 28.03% relative to uninoculated full fertilizer.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 80% RDF of NP with PGPR (B2)e0
- Interactor
- Serratia sp.e1symbiont
- Outcome
- number of tillers per plante0
- Direction
- increasede0
- Value
- 28.03%e0
- Comparator
- uninoculated control with 100% RFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD.”
e1“B2 (Serratia sp.)”
Claim · model-written summary
B2 plus 80% fertilizer significantly increased wheat grain number per spike by 19.61% relative to uninoculated full fertilizer.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 80% RDF of NP with PGPR (B2)e0
- Interactor
- Serratia sp.e1symbiont
- Outcome
- grain number per spikee0
- Direction
- increasede0
- Value
- 19.61%e0
- Comparator
- uninoculated control with 100% RFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD.”
e1“B2 (Serratia sp.)”
Claim · model-written summary
B2 plus 80% fertilizer significantly increased wheat 1000-grain weight by 10.5% relative to uninoculated full fertilizer.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 80% RDF of NP with PGPR (B2)e0
- Interactor
- Serratia sp.e1symbiont
- Outcome
- 1000-grain weighte0
- Direction
- increasede0
- Value
- 10.5%e0
- Comparator
- uninoculated control with 100% RFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD.”
e1“B2 (Serratia sp.)”
Claim · model-written summary
B2 plus 80% fertilizer significantly increased wheat biomass by 9.2% relative to uninoculated full fertilizer.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 80% RDF of NP with PGPR (B2)e0
- Interactor
- Serratia sp.e1symbiont
- Outcome
- biomasse0
- Direction
- increasede0
- Value
- 9.2%e0
- Comparator
- uninoculated control with 100% RFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD.”
e1“B2 (Serratia sp.)”
Claim · model-written summary
Bacterial inoculants with 80% fertilizer significantly increased soil available N, P and potassium in wheat crops.
- Taxon
- wheatTriticum aestivume0
- Treatment
- bacterial inoculants with 80% RFD of NPe0
- Outcome
- available N, P and potassiume0
- Direction
- increasede0
- Comparator
- uninoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil properties in the terms of available N, P and potassium, microbial biomass carbon, soil enzyme activities and population of phosphate-solubilising bacteria in the wheat crop were significantly increased by the combined application of bacterial inoculants with 80% RFD of NP in both years over the uninoculated control.”
Claim · model-written summary
Bacterial inoculants with 80% fertilizer significantly increased microbial biomass carbon and soil enzyme activities.
- Taxon
- wheatTriticum aestivume0
- Treatment
- bacterial inoculants with 80% RFD of NPe0
- Outcome
- microbial biomass carbon, soil enzyme activitiese0
- Direction
- increasede0
- Comparator
- uninoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil properties in the terms of available N, P and potassium, microbial biomass carbon, soil enzyme activities and population of phosphate-solubilising bacteria in the wheat crop were significantly increased by the combined application of bacterial inoculants with 80% RFD of NP in both years over the uninoculated control.”
Claim · model-written summary
Bacterial inoculants with 80% fertilizer significantly increased phosphate solubilizing bacteria in wheat crops.
- Taxon
- wheatTriticum aestivume0
- Treatment
- bacterial inoculants with 80% RFD of NPe0
- Outcome
- population of phosphate-solubilising bacteriae0
- Direction
- increasede0
- Comparator
- uninoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil properties in the terms of available N, P and potassium, microbial biomass carbon, soil enzyme activities and population of phosphate-solubilising bacteria in the wheat crop were significantly increased by the combined application of bacterial inoculants with 80% RFD of NP in both years over the uninoculated control.”
Claim · model-written summary
Authors concluded indigenous PGPR could replace about 20% of NP fertilizer without reducing wheat productivity or soil fertility.
- Taxon
- wheatTriticum aestivume0
- Outcome
- supplement ~20% of NP fertiliserse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potential of indigenous PGPR isolates to supplement ~20% of NP fertilisers without hampering the soil fertility and productivity of wheat.”
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