Abstract

Sustainable application of fly ash and its management in agriculture is a major challenge nowadays. A pot culture experiment was conducted to find out the most suitable level of fly ash application for soil amendments that can improve the plant growth and productivity of Brahmi (Bacopa monnieri L.). After growing seedlings of B. monnieri under different levels of fly ash for 90 days, a significant increase in plant biomass, essential oil content and tolerance index (more than 100%) was observed under 25% of fly ash amended soil in comparison to garden soil and higher fly ash treatments. Leaf chlorophyll content and photosynthetic parameters were remained unchanged under 25% of fly ash as compared to seedlings grown on garden soil. However, these parameters were significantly declined under higher concentrations of fly ash treatments. Higher levels of fly ash caused oxidative damage and the induction of some antioxidative enzymes activities in B. monnieri indicates its capability to endure oxidative stress tolerance. Overall, our study showed that 25% of fly ash can be used as soil amendment for cultivation of B. monnieri L. leading to enhance plant biomass and essential oil production.

摘要

飞灰的可持续应用及其在农业中的管理是当今的主要挑战。进行了盆栽试验，以找出最适合的粉煤灰施用量，以改良土壤，以改善Brahmi（Bacopa monnieri L.）的植物生长和生产力。B. monnieri的幼苗生长后在不同的粉煤灰含量下持续90天，与花园土壤和较高粉煤灰处理相比，在25％的粉煤灰改良土壤下观察到植物生物量，精油含量和耐受指数显着提高（超过100％）。与在花园土壤上生长的幼苗相比，在25％的粉煤灰下，叶片的叶绿素含量和光合参数保持不变。但是，在较高浓度的粉煤灰处理下，这些参数显着下降。较高含量的粉煤灰会引起氧化损伤，而B. monnieri的某些抗氧化酶活性的诱导表明其具有承受氧化胁迫耐受性的能力。总体而言，我们的研究表明，粉煤灰的25％可作为土壤改良剂用于B. monnieri的栽培。 L.导致提高植物生物量和精油产量。