Abstract
The ‘Criolla’ potato (Solanum tuberosum) phureja group cultivated in the inter-Andean valleys of the high tropics, is commonly fertilized only with mineral nutrients in conventional production, without the use of soil test and use of organic fertilizers. The purpose of this study was to determine the potential of organic chicken manure as a source of nutrients to increase yield and quality in ‘Criolla’ potatoes compared to conventional fertilization. Treatments evaluated were organic chicken manure, mineral nutrition based on soil tests, organic manure mixed with mineral nutrition, and conventional nutrition based on farmers’ typical nutrition plans. In plant response conventional and mineral treatments mixed with organic matter were the best in leaf area and dry weight of shoot and tuber. Treatment with mineral nutrition mixed with organic manure (2 and 6 t) obtained the largest length of the main stems. The b est yield response was obtained with conventional nutrition, while the major size was obtained with mineral and mineral combined with organic treatments. According to the results, the best response was obtained with the application of mineral nutrition in the combination of 6 t ha-1 organic manure.
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