Changes in photosynthetic pigments and uptake of some soil elements by chicory supplied with organic fertilizers
2019
Gholami, Hossein | Ghani, Askar | Raouf Fard, Fatemeh | Saharkhiz, Mohammad Jamal | Hazrati, Hossein
Due to the important role of medicinal and aromatic plants in different industries, it is important to increasing production of yield and secondary metabolite produced without the use of harmful chemical fertilizer. The use of organic fertilizers like humic acid and vermicompost is the best way to achieve safe production. Chicory (Cichorium intybus L.) is a vegetable with possible medicinal properties. The research was undertaken to determine the effects of humic acid at 0, 0.3, 0.6 and 0.9 kg.ha−1 and vermicompost at 0, 5, 7.5 and 10 t.ha−1 on mineral elements N, P, K, Fe, Zn, Mn, Cu uptake, photosynthetic pigment concentrations, and fresh and dry yield. The experiment was based on randomized complete block design with factorial arrangement. The humic acid and vermicompost benefitted nutrient uptake, yield and photosynthetic pigment concentrations of chicory. The highest of N (4.64%) and P value (0.83%) was in the 10 t.ha−1 vermicompost plus 0.6 kg.ha−1 humic acid treatment. The maximum potassium content (11.05%) was obtained by application of 0.6 kg.ha−1 humic acid and vermicompost (7.5 t.ha−1). Humic acid and vermicompost did not affect on Mn content in aerial parts. Application of 10 t.ha−1 vermicompost in combination with 0.6 kg.ha−1 humic acid increased total chlorophyll content (average 3.63 mg.g−1 FW). In humic acid treatments, the highest carotenoid pigments contents are measured 9.85 and 9.62 mg.g−1 FW, by application 0.6 kg.ha−1 and 0.9 kg.ha−1 humic acid, respectively. While as relation to vermicompost, the maximum content 10.08 mg.g−1 FW was determined in 10 t.ha−1 vermicompost treatment. Appropriate concentrations of vermicompost and humic acid can be used for organic production of chicory.
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