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Microbiology of the root region of coconut and cacao under mixed cropping

by Nair, S.K; Rao, N.S.S.
Publisher: 1977Subject(s): THEOBROMA CACAO | INSECTOS DAÑINOS DE LA RAIZ | CULTIVO MIXTO | RIZOSFERA | FAUNA DEL SUELO | SISTEMA RADICULAR | ASPERGILLUS FLAVUS | ASPERGILLUS FUMIGATUS | AIA | ACIDO GIBERELICO | FIJACION DEL NITROGENO | THEOBROMA CACAO | ROOT EATING INSECTS | MIXED CROPPING | RHIZOSPHERE | SOIL FAUNA | ROOT SYSTEMS | ASPERGILLUS FLAVUS | ASPERGILLUS FUMIGATUS | IAA | GIBBERELLIC ACID | NITROGEN FIXATION | THEOBROMA CACAO | INSECTE RADICIVORE | CULTURE EN MELANGE | RHIZOSPHERE | FAUNE DU SOL | SYSTEME RACINAIRE | ASPERGILLUS FLAVUS | ASPERGILLUS FUMIGATUS | AIA | ACIDE GIBBERELLIQUE | FIXATION DE L'AZOTE In: Plant and Soil (Países Bajos) v. 46(3) p. 511-519Summary: Mixed cropping of cacao in coconut plantations improved the microbial activity in the rhizosphere of coconut which may be attributed to an increase in organic matter content of soil due to periodic shedding of cacao leaves. When compared to coconut cultivation without cacao, mixed cropping of coconut with cacao appeared to stimulate the population of bacteria and fungi in the rhizosphere of coconut, including the nitrogen fixing and phosphate solubilising bacteria. The occurrence of indole acetic acid producing Escherichia sp. on the root surface of coconut and the appearance of gibberelin (like-substance) producing Aspergillus flavus and A. fumigatus in the rhizosphere were other salient observations made in a pioneering study on the microbiology of the root region of plantation crops under mixed cropping
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Mixed cropping of cacao in coconut plantations improved the microbial activity in the rhizosphere of coconut which may be attributed to an increase in organic matter content of soil due to periodic shedding of cacao leaves. When compared to coconut cultivation without cacao, mixed cropping of coconut with cacao appeared to stimulate the population of bacteria and fungi in the rhizosphere of coconut, including the nitrogen fixing and phosphate solubilising bacteria. The occurrence of indole acetic acid producing Escherichia sp. on the root surface of coconut and the appearance of gibberelin (like-substance) producing Aspergillus flavus and A. fumigatus in the rhizosphere were other salient observations made in a pioneering study on the microbiology of the root region of plantation crops under mixed cropping

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