Biological nitrogen fixation in trees in agro-ecosystems

Danso, S. K. A.; Bowen, G. D.; Sanginga, N.

doi:10.1007/978-94-017-0910-1_10

Cited by 83 publications

(84 citation statements)

References 47 publications

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“…De acordo com Danso et al (1992), além da habilidade da estirpe de promover boa nodulação em solo ácido, o genótipo da planta é muito importante no processo de formação dos nódulos. Chong et al (1987) relataram que as plantas excretam diferentes exsudatos, que podem promover alterações no pH do solo próximo à rizosfera, possibilitando a nodulação em solos ácidos.…”

Section: Resultados E Discussão Peso De Nódulos E Atividade Da Nitrogunclassified

Efeito da calagem e inoculação de sabiá em solo da mata úmida e do semi-árido de Pernambuco

Stamford

Silva

2000

Pesq. agropec. bras.

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RESUMO -Realizou-se um experimento, usando solo álico da Zona da Mata e do Semi-Árido do Estado de Pernambuco, com o objetivo de avaliar o efeito da calagem (0, 3 e 6 t ha -1 ) e da inoculação das estirpes de rizóbio: NFB 539, NFB 577 e NFB 578, previamente selecionadas para sabiá (Mimosa caesalpiniaefolia) em meio de cultura ácido. Adicionaram-se tratamentos sem inoculação, sem e com adição de N mineral (100 kg ha -1 ), para fins comparativos. O experimento seguiu o esquema fatorial 2x3x5, no delineamento em blocos ao acaso, com quatro repetições. As plantas foram colhidas 110 dias após a emergência (DAE). A inoculação de rizóbio, em todos os níveis de calagem, mostrou efeito significativo nos parâmetros avaliados. No nível de 3 t ha -1 não houve efeito da calagem, porém a adição de 6 t ha -1 de calcário reduziu o peso de matéria seca, o N total na parte aérea, a nodulação e a atividade da nitrogenase. O baixo pH e Al 3+ do solo não prejudicou a fixação do N 2 , e o crescimento das plantas que receberam o inóculo. Portanto, torna-se desnecessária a calagem no cultivo de sabiá em solos ácidos, quando usadas estirpes selecionadas visando à resistência a acidez.Termos para indexação: calcário, fixação do N 2 , Mimosa caesalpiniaefolia, rizóbio, solos álicos. EFFECT OF LIME AND INOCULATION OF MIMOSA CAESALPINIAEFOLIA IN ACID SOIL OF THE FOREST ZONE AND SEMIARID REGION OF PERNAMBUCO, BRAZILABSTRACT -An experiment was carried out in order to evaluate the effect of liming (0, 3 and 6.0 ton ha -1 ) in two alic soils of humid forest zone and semiarid region of the State of Pernambuco, Brazil, and rhizobia inoculation with strains NFB 539, NFB 577 and NFB 578, selected to Mimosa caesalpiniaefolia in previous assays with culture media using crescent levels of Al 3+ and acidity. Treatments without inoculation with and without N addition (100 kg ha -1 ) were included. A factorial 2x3x5 was used in a randomized block design with four replicates. Plants were harvested at 110 days after emergence (DAE). Rhizobia inoculation showed significative effect regarding all parameters evaluated, at the lime levels used. M. caesalpiniaefolia did not respond to liming, however when used the level 6.0 ton ha -1 , reduction in dry matter, N total uptake, nodulation and nitrogenase activity occurred. The low pH and high Al 3+ in the natural soil did not promote injurious effect on N 2 fixation and on growth of plants inoculated, showing that lime addition is not necessary to M. caesalpiniaefolia tree legume cropped in acid soils when strains selected to acidity are used.

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Section: Resultados E Discussão Peso De Nódulos E Atividade Da Nitrogunclassified

Efeito da calagem e inoculação de sabiá em solo da mata úmida e do semi-árido de Pernambuco

Stamford

Silva

2000

Pesq. agropec. bras.

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“…Cependant elle ne peut réussir sur ces sols dégradés que si la fertilité est restaurée. Grâce à leur aptitude à fixer l'azote de l'air (Danso et al, 1992;Sanginga et al, 1996), l'association des légumineuses aux cultures constitue un moyen biologique de restauration et de maintien de la fertilité des sols. Aussi, les légumineuses arborées telles que Albizia lebbeck, Albizia guachaepele, Acacia mangium et Acacia auriculiformis sont -elles associées au caféier et au cacaoyer dans la zone de forêt dense semi-décidue (Koffi et al, 2000), et au cocotier sur les sables quaternaires du littoral ivoirien.…”

Section: Introductionunclassified

Evaluation De La Productivited\'une Association Cocotier / Legumineuses Arborees

N’Goran¹,

Zakra²,

Yoro³

et al. 2009

Agronomie Africaine

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RESUMEUne expérimentation d'association du cocotier (Cocos nucifera L) avec les légumineuses arborées (Acacia auriculiformis et Acacia mangium) a été mise en place sur les sables quaternaires du littoral ivoirien, pour l'amélioration de la productivité des cocotiers. Les résultats après 7 ans ont montré une amélioration de la teneur en azote des feuilles de cocotier, soit 2,2 % contre 1,62 % pour le traitement témoin, et de la productivité du cocotier de 50 noix par pied et par an contre 17 noix pour le témoin. Quinze ans après la mise en place de cet essai, la teneur en azote des feuilles de cocotiers est de 2 % contre 1,8 % pour le témoin. De même la productivité du cocotier dans les traitements d'association a été supérieure à celle du témoin : 84 et 68 noix par pied et par an respectivement pour les traitements «cocotier / Acacia auriculiformis» et «cocotier / Acacia mangium» contre 52 noix pour le témoin. Le traitement «cocotier / Acacia. auriculiformis» avec 1135 kg.ha-1.an-1 de coprah a été supérieur au traitement «cocotier / Acacia. mangium» qui n'a donné que 924. kg.ha-1.an-1.Mots clés : cocotier, azote, arbre fixateur, association culturale, sables quaternaires, Côte d'Ivoire. ABSTRACT PRODUCTIVITY ASSESSMENT OF A FIFTEEN YEARS OLD COCONUT INTERCROPPED WITH LEGUMINOUS TREESA coconut palm / Acacia auriculiformis and Acacia mangium intercropping trial was set up in order to improve the productivity of the coconut palm.

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“…These multipurpose trees are useful for revegetation of degraded ecosystems that have low availability of nitrogen and phosphorus (4,6,13,14,55) because of their ability to form symbiotic associations with both rhizobial bacteria and mycorrhizal fungi. These bacterial and fungal symbionts are known to be key components of natural systems (8,64,65,66), since they are involved in governing the cycles of major plant nutrients and in sustaining the vegetation cover in natural habitats (63).…”

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confidence: 99%

The Exotic Legume Tree Species Acacia holosericea Alters Microbial Soil Functionalities and the Structure of the Arbuscular Mycorrhizal Community

Remigi

Faye

Kane

et al. 2008

Appl Environ Microbiol

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The response of microbial functional diversity as well as its resistance to stress or disturbances caused by the introduction of an exotic tree species, Acacia holosericea, ectomycorrhized or not with Pisolithus albus, was examined. The results show that this ectomycorrhizal fungus promotes drastically the growth of this fastgrowing tree species in field conditions after 7 years of plantation. Compared to the crop soil surrounding the A. holosericea plantation, this exotic tree species, associated or not with the ectomycorrhizal symbiont, induced strong modifications in soil microbial functionalities (assessed by measuring the patterns of in situ catabolic potential of microbial communities) and reduced soil resistance in response to increasing stress or disturbance (salinity, temperature, and freeze-thaw and wet-dry cycles). In addition, A. holosericea strongly modified the structure of arbuscular mycorrhizal fungus communities. These results show clearly that exotic plants may be responsible for important changes in soil microbiota affecting the structure and functions of microbial communities.Forest loss and degradation through human disturbance as well as deterioration of land productivity is a major problem in large areas of arid and semiarid environments. Degraded soils are characterized by loss or disturbance of the vegetation cover, increased soil erosion, decreased in-water infiltration, loss of available nutrients and organic matter, loss of microbial propagules, and/or diminution in microbial activity (25,35,44). Restoration of ecosystem health and productivity was traditionally achieved via abandonment of land and subsequent natural forest succession. In recent decades, management options for acceleration of the recovery and restoration of the productivity and biodiversity of disturbed ecosystems have been considered, since fallow periods have been shortened or eliminated due to increased anthropogenic pressure and agriculture intensification (49). Concerning the techniques used for rehabilitating degraded areas, there is increasing evidence that forest plantations can play a key role in ecosystem rehabilitation or restoration (52). Among candidate plantation species, fast-growing leguminous tree species (e.g., Australian Acacia species) should have preference.

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Biological nitrogen fixation in trees in agro-ecosystems

Cited by 83 publications

References 47 publications

Efeito da calagem e inoculação de sabiá em solo da mata úmida e do semi-árido de Pernambuco

Efeito da calagem e inoculação de sabiá em solo da mata úmida e do semi-árido de Pernambuco

Evaluation De La Productivited\'une Association Cocotier / Legumineuses Arborees

The Exotic Legume Tree Species Acacia holosericea Alters Microbial Soil Functionalities and the Structure of the Arbuscular Mycorrhizal Community

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