Enhancing the Quality of Monoterpenes in (Cymbopogon nardus (L.) Rendle) Through Rhizobacteria Application Toward Sustained Soil Health

Abstract

Cymbopogon nardus is an aromatic plant which produces essential oil. Citronellal, citronellol, and geraniol as well-known as monoterpenes. The component of monoterpenes in this research were triggered by organic matter, such as organic manure and rhizobacteria. Organic fertilizers are used for environmentally friendly by maintaining soil and plant health and it’s necessary to achieve agricultural sustainability. Rhizobacteria are beneficial microorganisms for plants and soil for environmental management of both soil, plants, and soil micro biodiversity. Rhizobacteria contributes to soil fertilization through bio-fixation and bio-solubilization of essential nutrients along with the production of growth regulators. Microorganisms regulate the mechanism of absorption and mobility of nutrients in soil. The objective of this research is to investigate the effects of rhizobacteria and organic manure on the component of monoterpenes as well as the content of citronellal, citronellol, and geraniol. The results research show that C. nardus treated with rhizobacteria accumulating of nitrogen 1% and geraniol 5% in leaves which is more than those without rhizobacteria. Interestingly, content of citronellal and citronellol in leaves increased reach at 10% treated by without rhizobacteria and it higher than those supplied with rhizobacteria. In that case, citronellal, citronellol, geraniol formed from the carbon which was seems supplied by organic manure. Furthermore, rhizobacteria treatment shows a stable content of oil components in various rates of organic manure, but able to increase the oil yield at about 30% of C. nardus. Meanwhile, without supply of rhizobacteria, the result of oil yield relatively similar in various rates of organic manure. Regarding to the results, found that application of rhizobacteria able to increase the fresh weight, dry weight, and oil content. As consequently, contribution of rhizobacteria and organic manure to the mechanism of mineralization and improve soil health indirectly. Hence, plant able to uptake and accumulation nutrients in particular nitrogen, phosphorous and potassium.