Resumo

KUILA, Debashis et al. Effect of an indigenous AM and PGPR combination on chilli growth and productivity in lateritic soil. Biot. Veg. [online]. 2020, vol.20, n.3, pp. 177-188.  Epub 01-Set-2020. ISSN 2074-8647.

Infertile lateritic soil is particularly deficient in phosphorus (P) and Nitrogen (N). Arbuscular Mycorrhiza (AM) has a key role to uptake bound P from the soil and provide to the plants growing under P-poor conditions and improve water and nutrient uptake. Azotobacter fixes free nitrogen and phosphate solubilizing bacteria (PSB) release bound phosphate, are the important groups of plant growth-promoting rhizobacteria (PGPR), sometimes they may act as mycorrhiza helper and applied with AM as biofertilizer. This pot experiment was conducted to determine the primary impact of singly and combined application of native bio-inoculants, the AM, Acaulospora, and the PGPR, Azotobacter and Pseudomonas sp. (PSB) on growth and yield of chilli (Capsicum frutescens L.), growing in acid lateritic soil. Inoculated treatments were compared for growth and productivity of chilli in terms of height, leaf number, leaf area, root collar diameter, number of flowers and number of fruits, final fresh and dry yield. The productivity of chilli showed a maximum in combined treatment of Acaulospora, Azotobacter, and PSB. Also the AM spore count and root colonization found maximum in that treatment. Hence the application of indigenous AM inoculation along with native PGPR, Azotobacter and PSB may present better productivity in low fertile lateritic soil.

Palavras-chave : Acaulospora; Azotobacter; infertile soil; mycorrhiza; PSB.

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