Characterization Of Nutrient Deficiency Symptoms In Sweetpotato Through Farmer-Scientist Participatory Approach

Victor  B. Asio,; Anabella  B. Tulin,; Dindo  M. Campilan,; Shigenao  Kawai,

Characterization Of Nutrient Deficiency Symptoms In Sweetpotato Through Farmer-Scientist Participatory Approach

Anabella B. Tulin | Victor B. Asio | Dindo M Campilan | Shigenao Kawai

Abstract:

The nutritional disorders in the leaves, shoots, and root systems of sweetpotato variety PSB SP-17 were evaluated using the solution culture technique. Nutrient deficiency symptoms were established for the following elements: nitrogen, phosphorus,potassium, magnesium, calcium, sulfur, iron and rnicronutrients. Thirty-six healthy stem cuttings of sweetpotato were allowed to root for one week before placing them in culture bottles containing the nutrient solutions representing the various treatments. The sweetpotato cuttings were grown in culture bottles for more than two months and visible deficiency symptoms of each element were noted as they occur in the leaves and roots. Results showed that each nutrient element has a characteristic deficiency symptom there were also some_ similarities in the general performance of sweetpotato in nutrient deficient cul~ solutions. These similarities include the stunted growth of the plant and general yellowing of the leaves and reduced root biomass. _After the ~ymptoms were established in the laboratory, fanners from two s~tpo~to producmg towns m Pinabacdao, Samar and Dulag Leyte Philippines were asked to identify th e symptoms usm• g ther•r own m· d1· genous knowle' dge an' d perception.Fanrers , conce.p t of crop health and assessment of deficiency symptoms were likewise noted.

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