2016
DOI: 10.15517/am.v6i0.24808
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Selección de cepas nativas de Rhizobium leguminosarum bv phaseoli eficientes en fijación biológica de nitrógeno en suelos de Costa Rica.

Abstract: One hundred and thirty one strains of R. leguminosarum bv phaseoli were isolated from different bean producing zones in Costa Rica. The response of its inoculation to the Huasteco Negro (Phaseolus vulgaris L.) bean variety was evaluated under green house conditions. Pots and heat treated soil were used. The seeds inoculation was conducted using a bacterial suspension of 10° ucf/ml, approximately. Besides, anabsolute control (without inoculation, without nitrogen) and a control with nitrogen (+ 140 kg N/ha) wer… Show more

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Cited by 4 publications
(7 citation statements)
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“…in seeds. After 2 weeks of germination percentage was determined, the seedlings were thinned, leaving in each pot the most vigorous (Mora, 1995;Matos et al, 1998). The seedlings were kept under greenhouse conditions, with moisture of 70% -80%, temperature of 31 -34°C where the air volume, brightness and attack by pests are controlled and the irrigation was sprayed twice daily for 2 hours.…”
Section: Seed Bioassaymentioning
confidence: 99%
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“…in seeds. After 2 weeks of germination percentage was determined, the seedlings were thinned, leaving in each pot the most vigorous (Mora, 1995;Matos et al, 1998). The seedlings were kept under greenhouse conditions, with moisture of 70% -80%, temperature of 31 -34°C where the air volume, brightness and attack by pests are controlled and the irrigation was sprayed twice daily for 2 hours.…”
Section: Seed Bioassaymentioning
confidence: 99%
“…Three L. leucocephala seeds were sown at a depth of 2 cm, previously disinfected and subjected to pretreatment in sterile distilled water for 2 hours before sowing. After two weeks of germination percentage was determined, the seedlings were thinned leaving in each pot the most vigorous (Mora, 1995;Rincón, 2000). The control treatment was only added 2 mL of sterile distilled water.…”
Section: Seedlings Bioassaymentioning
confidence: 99%
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“…La presencia en el suelo de cepas nativas poco ef icientes y muy competitivas, así como algunos aspectos abióticos del suelo que afectan el proceso de infección, contribuyen a la baja ef iciencia en la f ijación de N 2 del binomio frijol-Rhizobium (Mora, 1995;Martínez-Romero, 2001;Castro et al, 2006). Estos autores af irman que la selección de cepas ef icientes y competitivas debe realizarse directamente en el área de producción, donde como primer paso se deben de colectar rizobios nativos y como segundo, evaluarlos por ef iciencia en f ijación en las variedades locales y bajo las condiciones de clima y suelo del área de producción.…”
Section: Introductionunclassified