Nutrient absorption curve in jambu (spilanthes oleracea l.), cultivated in hydroponic system
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.005.0044Keywords:
Nutrients exportation, Hydroponics, Medicinal plants, Nutrient contenteAbstract
Jambu is a leafy vegetable that has been winning the national and international market, closely linked to its active ingredients, thus increasing the diversification of its production, for example, in hydroponic system. The objective of this research was to analyze the nutrient absorption curve in jambu plants, grown in a hydroponic system. The experiments were carried out at the B&A Hidroponia company in a NFT hydroponic cultivation system in a protected environment. The treatments consisted of 06 collections with 03 repetitions each, performed at an interval of 05 in 05 days. The experimental design used was completely randomized with six treatments (six collections) and three replications. The decreasing order of the macronutrients accumulated by the jambu plant was: nitrogen> potassium> calcium> phosphorus> magnesium> sulfur, and micronutrients: sodium> aluminum> iron> boron> manganese> zinc> copper, with a period of greatest growth and demand for nutrients from 39 to 54 days after sowing. The chlorophyll content is linked to the absorption of nutrients by jambu plants. Thus, the nutrient solution used proved to be inadequate for the culture in this system, which leads to losses in productivity between the production windows, and preventing the culture from meeting its maximum productive potential, and consequently greater financial returns. Thus, it is necessary to formulate a specific nutrient solution for the jambu plant grown in a hydroponic system.
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