Evaluation of different organic manure mixtures in vegetable amaranth cultivation
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Society for Promotion of Horticulture
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An investigation was conducted during 2009-2011 at College of Agriculture, Vellayani, to develop bio-organiccomposite manures containing at least 3%N, with N:K ratio of 1:0.5, and to evaluate the effect of these manures on growth and productivity of vegetables. The investigation comprised three separate experiments, namely, formulation and quality evaluation of bio-organic composite manures, mineralization of bio-organic composite manures, and, crop response study. Amaranth (Amaranthus tricolor) was raised as a test crop for the study. Organic sources used in the preparation of bio-organic composite manures were:coir pith compost, poultry manure, neem cake, ground nut cake, ash, rock dust and microbial consortium. Five composite organic manures, satisfying the selection criteria (3%N, N:K ratio of 1:0.5), were identified for further investigation. Results of the crop response study revealed that among the bio-organic composite manures used, maximum yield was obtained under poultry manure (50g) + ground nut cake (30g) + rock dust (19g) + microbial consortium (1g), and this was on par with (i) coir pith compost (50g) + ground nut cake (35g) + ash (15g), and, (ii) poultry manure (50g) + ground nut cake (30g) + rock dust (20g).
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