دراسة استجابة نبات تبغ الفرجينيا لطرق الري ومعادلات التسميد البوتاسي على بعض مؤشرات النمو المورفولوجية والبيوكيميائية

Abstract

The experiment was carried out at the Stakhris Agricultural Scientific Research Station in Lattakia during the 2021 agricultural season, according to a randomized complete block design (RCBD), where the experiment included two irrigation methods (furrows (I2), drip (I1)), and three levels of potassium fertilization (K3, K2, K1), with three replicates for each treatment. The aim of the research was to study the response of Virginia tobacco plants to irrigation methods and potassium fertilization equations on some morphological and biochemical growth indicators, as morphological and physiological characteristics were studied (plant height (cm) and total leaf surface area (m2/plant). ), and the content of air-dried tobacco leaves of biochemical compounds (total protein, soluble sugars, and nicotine (%).Using the drip irrigation method with the second level of potassium fertilization (I1K2) gave the best results, as it was significantly superior to the rest of the treatments, as the value of the plant height in this treatment reached (225 cm), which was reflected positively on the total leaf surface area of ​​the plant (3.52 m²). /plant), and the qualitative characteristics of dry tobacco leaf improved, as the percentage of total protein and nicotine decreased and the percentage of total soluble sugars increased. Based on the above, it can be suggested to use the drip irrigation method with the second level of potassium fertilization, given its tangible role in stimulating growth in the Virginia variety and improving the quality of the resulting tobacco.