Arbuscular-mycorrhizal inoculation of five tropical fodder crops and inoculum production in marginal soil amended with organic matter

By A. Gaur, A. Adholeya. Biology and Fertility of Soils, 2002

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Abstract. Five fodder crops, Zeamays, Medicagosativa, Trifoliumalexandrinum, Avenasativa, and Sorghumvulgare were inoculated with a consortia of indigenous arbuscular mycorrhizal (AM) fungi in non-sterile PO43– deficient sandy loam soil amended with organic matter under field conditions. Shoot and root dry weights and total uptake of P and N of all the test plants were significantly increased by AM inoculation. Mycorrhizal inoculation increased yield in terms of shoot dry weight by 257% in T.alexandrinum followed by 50% in A.sativa, 28% in Z.mays, 20% in M.sativa and 6% in S.vulgare. Variation in dependence on mycorrhiza was observed among the fodder crops. T.alexandrinum showed a maximum dependence of 72% in contrast to 5.7% dependency in S.vulgare. Plant species showed differences in percentage AM colonization, with a high root infection recorded in Z.mays (76%). Spore production and infectious propagules (IP) were as high as 78 spores/IP g–1 and 103 spores/IP g–1 in S.vulgare. This study clearly indicates the potential of using indigenous AM inoculations in fodder crops grown in marginal soils along with in situ large-scale production of AM inocula.

Subfields: Plant Science, Soil Science

View Paper: https://www.semanticscholar.org/paper/835bf3961e2f2d8b274526b8df9ece0ead2b005a

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