Non-isotopic method for the quantification of biological nitrogen fixation and wheat production under field conditions

Galal, Y. G. M.; El-Ghandour, I. A.; Aly, Sara; Soliman, S.H.D.; Gadalla, A. M.

doi:10.1007/s003740000212

Cited by 19 publications

(9 citation statements)

References 9 publications

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“…The PGPR effects also increase N and P uptake in field trials (Galal et al 2000;Panwar and Singh 2000), presumably by stimulating greater plant root growth. Substantial increases in N uptake by wheat plants and grain were observed in greenhouse trials with inoculation of Azospirillum brasilense (Islam et al 2002).…”

Section: Symbiotic N 2 -Fixing Bacteriamentioning

confidence: 94%

Soil beneficial bacteria and their role in plant growth promotion: a review

et al. 2010

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Section: Symbiotic N 2 -Fixing Bacteriamentioning

confidence: 94%

Soil beneficial bacteria and their role in plant growth promotion: a review

et al. 2010

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“…More recently, Montanez et al (2009), have shown that maize may also be colonised by endophytic bacteria in roots, stems and leaf tissues leading to an estimated 12 to 33% nitrogen in the plant coming from N-fixation. Recent agronomic researches have been trying to make benefit of this property by inoculating other cereals (wheat, rice) with N 2 -fixing organisms, mainly Azospirillum (Kennedy et al 1997;Galal et al 2000;Oliveira et al 2006). However, the benefit of inoculating N 2 -fixing organisms has not been firmly demonstrated yet and variable results are obtained seemingly due to interaction with the environment (Oliveira et al 2006).…”

Section: Other Nitrogen Fluxesmentioning

confidence: 99%

Carbon, nitrogen and Greenhouse gases budgets over a four years crop rotation in northern France

et al. 2011

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Croplands mainly act as net sources of the greenhouse gases carbon dioxide (CO₂) and nitrous oxide (N₂O), as well as nitrogen oxide (NO), a precursor of troposheric ozone. We determined the carbon (C) and nitrogen (N) balance of a four-year crop rotation, including maize, wheat, barley and mustard, to provide a base for exploring mitigation options of net emissions. The crop rotation had a positive net ecosystem production (NEP) of 4.4 +/- 0.7 Mg C ha(-1) y(-1) but represented a net source of carbon with a net biome production (NBP) of -1.3 +/- 1.1 Mg C ha(-1) y(-1). The nitrogen balance of the rotation was correlated with the carbon balance and resulted in net loss (-24 +/- 28 kg N ha(-1) y(-1)). The main nitrogen losses were nitrate leaching (-11.7 +/- 1.0 kg N ha(-1) y(-1)) and ammonia volatilization (-9 kg N ha(-1) y(-1)). Dry and wet depositions were 6.7 +/- 3.0 and 5.9 +/- 0.1 kg N ha(-1) y(-1), respectively. Fluxes of nitrous (N₂O) and nitric (NO) oxides did not contribute significantly to the N budget (N₂O: -1.8 +/- 0.04; NO: -0.7 +/- 0.04 kg N ha(-1) y(-1)) but N₂O fluxes equaled 16% of the total greenhouse gas balance. The link between the carbon and nitrogen balances are discussed. Longer term experiments would be necessary to capture the trends in the carbon and nitrogen budgets within the variability of agricultural ecosystems

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“…Soil applications with Azospirillum can significantly increase cane yield in both plant and ratoon crops in the field (Shankariah and Hunsigi, 2001). The PGPR effects also increase N and P uptake in field trials (Galal et al, 2000;Panwar and Singh, 2000), presumably by stimulating greater plant root growth. Substantial increases in N uptake by wheat plants and grain were observed in greenhouse trials with inoculation of A. brasilense (Islam et al, 2002).…”

Section: Types Of Micro-organisms Involved In Bnf At a Glancementioning

confidence: 96%

Microbial intervention in agriculture: An overview

Sengupta¹,

Gunri²

2015

Afr. J. Microbiol. Res.

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With increase in population, rapid urbanization and industrialization, land area under agricultural production is decreasing day by day. In order to feed the huge population, more production is required from lesser area, which triggers continuous applications of higher doses of inorganic fertilizers in an injudicious manner posing serious harm on soil health, further rendering large fraction of land unfit for cultivation every year due to nutrient imbalance. Combustion of fossil fuels during production of inorganics, leaching, loss of excess inorganic nitrate and phosphorus from cropped lands, excessive uplifting of ground water for irrigation purpose also lead to degradation of the quality of environment and natural resources through global warming, eutrophication, heavy metal contamination in ground water, etc. Under such circumstances, some improvised technologies are to be adopted to enhance productivity in a sustainable manner. A great deal of effort focusing on the soil biological system and the agro-ecosystem as a whole is needed to enable better understanding of the complex processes and interactions governing the stability of agricultural lands. The technological advances made in recent times in exploring biodiversity have revealed that microbial diversity has immense potential that can be explored through careful selection of microbes and their successful utilization in solving major agricultural and environmental issues.

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Non-isotopic method for the quantification of biological nitrogen fixation and wheat production under field conditions

Cited by 19 publications

References 9 publications

Soil beneficial bacteria and their role in plant growth promotion: a review

Soil beneficial bacteria and their role in plant growth promotion: a review

Carbon, nitrogen and Greenhouse gases budgets over a four years crop rotation in northern France

Microbial intervention in agriculture: An overview

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