Influence of Fertilizer Types on Total Phenolic and Inulin Contents in Jerusalem artichoke (Helianthus tuberosus L.)
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Abstract
Jerusalem artichoke (Helianthus tuberosus L.) is a plant that has potential as a health food. The objective of this research was to determine the influence of fertilizer types on growth, yield, and total phenolic and inulin contents in Jerusalem artichoke seed pods. The experiment was conducted by using randomized complete block designed (RCBD) with 4 levels. The treatment consisted of 1) no fertilizer application 2) chemical fertilizer at the rate of 25 kg/rai 3) manure fertilizer at the rate of 1,000 kg/rai and 4) bio-composted fertilizer at the rate of 1,000 kg/rai. Plant height, SPAD chlorophyll meter reading (SCMR), leaf area per plant, leaf dry weight, stem dry weight, number of tubers per plant, total phenolic and inulin contents were collected. The results showed that fertilizer type statistically affected leaf area and number of tubers per plant. Chemical fertilizers application showed the highest of leaf area but results were not significantly different from manure fertilizer, whereas application of manure fertilizer produced the highest number of tubers per plant. Fertilizer type created no significant effect on total phenolic and inulin contents. However, manure and biofertilizer application showed a trend to increase total phenolic and inulin content compared with other fertilizer applications. In addition, the significant correlations were found between: 1) total phenolic content and SCMR (0.99**) and 2) inulin content and head per plant (0.98*) of Jerusalem artichoke.
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King Mongkut's Agricultural Journal
References
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