Yasser Hammad ⁽¹⁾, Majd Darwish ⁽¹⁾and Habib Habib ^(1)*

(1). Department of Soil Science, Tishreen University, Lattika, Syria.

(*Corresponding author: Habib Habib, E.mail: abo.ward.habeeb.2021@gmail.com)

Received:10/07/2023          Accepted: 19/09/2023

Abstract: 

The research was carried out in the fields of Al-Hara village of Al-Muzairah during the agricultural season 2021 using Virginia VK51 tobacco seedlings, according to a randomized complete block design (RCBD) with three replicates for each treatment in order to study the effect of treatment with some biofertilizers of growth-inducing PGPR bacteria on the growth, productivity and quality of tobacco plants compared to By unqualified witness. Some morphological and physiological characteristics were determined: such as plant height, total leaf area (m2/plant), yield of green and air-dry leaves (kg/dunum), and the content of air-dried tobacco leaves of biochemical compounds (total protein, soluble sugars, and nicotine (%)). The treatment with PGPR bacteria led to an increase in plant height and the total leaf area of the plant, and gave the highest yield of green leaves (3250 kg / dunum) and dry leaves (700 kg / dunum), especially when treated with organic fertilizer and a mixture of PGPR bacteria, and the quality characteristics of the tobacco leaf also improved dry as the percentage of total protein and nicotine decreased and the percentage of total soluble sugars increased. Based on the foregoing, it can be suggested to use the method of composting with a mixture of bacterial species on a larger scale, due to its significant role in stimulating the growth of Virginia VK51 and improving the quality of the resulting tobacco

Keywords: biofertilizers, PGPR, Virginia tobacco.

Full paper in Arabic: pdf