Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics

In the humid tropics, the largest obstacle to the implementation of sustainable farming systems is the reduced efficiency of nutrient use by crops. This study assesses the effectiveness of five selected rhizobia strains in symbiosis with cowpea (Vigna unguiculata (L.) Walp.), with the objective of r...

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Autores principales:	Donizetti dos Santos,José Geraldo, Ferreira Aguiar,Alana das Chagas, Silva Junior,Edilson Máximo, Lemes Dadalto,Danubia, Rodrigues Sousa,Merijane, Ribeiro Xavier,Gustavo, Gomes de Moura,Emanoel
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	Agroecosystem nitrogen-fixing nodule bacteria legumes
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400015
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spelling	oai:scielo:S0718-583920110004000152018-10-01Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the TropicsDonizetti dos Santos,José GeraldoFerreira Aguiar,Alana das ChagasSilva Junior,Edilson MáximoLemes Dadalto,DanubiaRodrigues Sousa,MerijaneRibeiro Xavier,GustavoGomes de Moura,Emanoel Agroecosystem nitrogen-fixing nodule bacteria legumes In the humid tropics, the largest obstacle to the implementation of sustainable farming systems is the reduced efficiency of nutrient use by crops. This study assesses the effectiveness of five selected rhizobia strains in symbiosis with cowpea (Vigna unguiculata (L.) Walp.), with the objective of replacing N fertilization in the predominant agricultural system used by smallholder farmers. The study was carried out in three adjacent areas with distinct agricultural uses: conventional tillage, itinerant agriculture, and a no-till system. The experimental design was in randomized complete blocks with four replicates and seven treatments: five rhizobia strains (BR3262, BR3267, BR3299, INPA3-11B, and UFLA 3-84) and two controls without inoculation (one without mineral N and another fertilized with 74 kg N ha-1). We measured the dry mass of 100 grains, nodules and shoots, as well as cowpea yields and calculated relative and absolute efficiency indices for dry biomass production of cowpea shoots. Agricultural uses affected the number and dry mass of the nodules and, consequently, the mass of the dry plant matter and bean yield. In terms of yield, there was a major difference between the conventional and the itinerant systems. Yield was around four times as high in the itinerant system (1009.9 kg ha-1 compared to 243.7 kg ha-1). Under conditions of cohesion-prone soils, the system of conventional tillage reduces the possibility of cultivation of a second harvest in the year even with inoculation or N fertilization.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.4 20112011-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400015en10.4067/S0718-58392011000400015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Agroecosystem nitrogen-fixing nodule bacteria legumes
spellingShingle	Agroecosystem nitrogen-fixing nodule bacteria legumes Donizetti dos Santos,José Geraldo Ferreira Aguiar,Alana das Chagas Silva Junior,Edilson Máximo Lemes Dadalto,Danubia Rodrigues Sousa,Merijane Ribeiro Xavier,Gustavo Gomes de Moura,Emanoel Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics
description	In the humid tropics, the largest obstacle to the implementation of sustainable farming systems is the reduced efficiency of nutrient use by crops. This study assesses the effectiveness of five selected rhizobia strains in symbiosis with cowpea (Vigna unguiculata (L.) Walp.), with the objective of replacing N fertilization in the predominant agricultural system used by smallholder farmers. The study was carried out in three adjacent areas with distinct agricultural uses: conventional tillage, itinerant agriculture, and a no-till system. The experimental design was in randomized complete blocks with four replicates and seven treatments: five rhizobia strains (BR3262, BR3267, BR3299, INPA3-11B, and UFLA 3-84) and two controls without inoculation (one without mineral N and another fertilized with 74 kg N ha-1). We measured the dry mass of 100 grains, nodules and shoots, as well as cowpea yields and calculated relative and absolute efficiency indices for dry biomass production of cowpea shoots. Agricultural uses affected the number and dry mass of the nodules and, consequently, the mass of the dry plant matter and bean yield. In terms of yield, there was a major difference between the conventional and the itinerant systems. Yield was around four times as high in the itinerant system (1009.9 kg ha-1 compared to 243.7 kg ha-1). Under conditions of cohesion-prone soils, the system of conventional tillage reduces the possibility of cultivation of a second harvest in the year even with inoculation or N fertilization.
author	Donizetti dos Santos,José Geraldo Ferreira Aguiar,Alana das Chagas Silva Junior,Edilson Máximo Lemes Dadalto,Danubia Rodrigues Sousa,Merijane Ribeiro Xavier,Gustavo Gomes de Moura,Emanoel
author_facet	Donizetti dos Santos,José Geraldo Ferreira Aguiar,Alana das Chagas Silva Junior,Edilson Máximo Lemes Dadalto,Danubia Rodrigues Sousa,Merijane Ribeiro Xavier,Gustavo Gomes de Moura,Emanoel
author_sort	Donizetti dos Santos,José Geraldo
title	Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics
title_short	Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics
title_full	Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics
title_fullStr	Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics
title_full_unstemmed	Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics
title_sort	soil management and efficiency of rhizobia strains of cowpea vigna unguiculata (l.) walp. in the tropics
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400015
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Soil Management and Efficiency of Rhizobia Strains of Cowpea Vigna unguiculata (L.) Walp. in the Tropics

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