Growth and nodulation of peanut grown in Sandy soil amended with Olive wastes [electronic resource].

Includes reference.

The effect of untreated olive mill wastewater (OMW) and crude olive cake as organic fertilizers, alone or in mixture with poultry manure, on nodulation and growth of peanut plants was investigated in a pot experiment under sandy-soil conditions. The application of low concentrations of either OMW or olive cake significantly increased the number and dry weight of nodules, shoots dry weight and N-content after 50 days of planting. The addition of poultry manure alone or in combination with olive wastes decreased all the abovementioned parameters. Plants fertilized with OMW combined with poultry manure scored the minimum number and dry weight of nodules. Incorporation of olive wastes into soil, with or without poultry manure, decreased nodulation parameters after 70 days of planting. Addition of OMW decreased shoots dry weight and N-content. Generally, soil amended with olive cake exhibited less toxicity compared to soil fertilized with OMW. Amendment with olive wastes and/or poultry manure increased the total flavonoids and soluble phenols of peanut plants compared with those inoculated with Rhizobium spp. only. The increase of total soluble phenols was insignificant. It is concluded that the application or OMW or crude olive waste with or without poultry manure caused inhibitory effect on nodulation and growth or peanut plants in sandy soil.

Summary in arabic.

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