Effect of Gibberellic Acid (GA3) and Balanced Fertilization ‎‎(NPK) on Some Productive and Quality Characteristics in ‎Sweet Corn (Zea mays var. saccharata) (Merit Hybrid) Under ‎Salt Stress ‎

Mais Daher(1) Majd Darwish*(1) and Sawsan Haifa(2)

(1). Department of Field Crops, Faculty of Agriculture, Tishreen University, Lattakia. Syria.

 (2). Department of Soil and Land Sciences, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

 (*Corresponding author: Dr. Majd Darwish. Lattakia. Syria. E-mail: majds26@yahoo.com).

Received: 12/02/2019                               Accepted: 25/03/2019


The experiment was carried out at a greenhouse in the Faculty of Agriculture, Tishreen University, during the agricultural season 2018, by the cultivation of the sweet corn (Zea mays var. Saccharata) grains (Merit hybrid) in plastic pots that were distributed according to randomized complete design with six pots per treatment. The research aimed to study the effect of plant spray with the gibberellic acid (15 and 30 ppm), balanced fertilizer (NPK) (10 g/L), and both gibberellic acid and balanced fertilizer on some growth, productivity and quality characteristics of sweet-corn-hybrid under salt stress conditions (4, 8 and 12) dS/cm. The saline stress, especially at 8 and 12 dS/cm levels, negatively affected the growth of sweet corn plants that led to decrease in fresh ears yield (g/plant) with reduced kernels protein content. The treatment of balanced fertilization NPK did not show any significant effects (P˃0.05) on the growth and productivity of plant; while the spray with gibberellic acid showed positive effects on most of morphological, physiological and productivity (fresh ears yield and its components) and quality (total content (%) of soluble sugar and protein) traits of the plants that were growing under control or salt stress conditions.  It could be recommended to spray gibberellic acid with 15-30 ppm concentrations considering to its observed role in stimulating the growth of Merit hybrid, besides increasing the yield and quality of fresh ears, as well as improving the plants tolerance to saline stress.

Keywords: Sweet corn, Gibberellic acid GA3, Balanced fertilizer (NPK), Salt stress.

Full paper in Arabic: PDF

The Application Effect of GA3 on Plant Growth, Yield and ‎Quality Attributes of Tomato (Lycopersicom esculentum Mill.) ‎

Kamal Krishna Mistry*(1) Kazi Farhad Iqubal(2) and Shyama Prasad Bapari(3)

(1). Department of Agriculture and Environmental Science, Akbar Ali Khan Technical Institute (Education Complex) under the Ministry of Education, Comilla-3517, Dhaka

(2). Department of Environmental Science, State University, Dhanmondi, Dhaka, Bangladesh.

(3). Ministry of Education, Government of the People’s Republic of Bangladesh, Dhaka, Bangladesh.

(*Corresponding author: Dr. Kamal Krishna Mistry. E-Mail: kkmistryphd@yahoo.com)

Received: 13/04/2020                               Accepted: 22/05/2020


This study was conducted at the ‘Integrated Farm’ of the International Anjel Association, Voluntary Organization of Japan, Konabari, Gazipure during the period of 10 November-30 January 2018, Bangladesh to find out the better performance of GA3 treatments doses on tomato variety Ratan. Data were collected on plant height, leaves number, fruits number per plant, fruit weight per plant, ascorbic acid and total soluble solids (Brix) regarding five levels of gibberellic acid viz. 20  ppm (T1), 40 ppm (T2), 60 ppm (T3), 80 ppm (T4) and 100 ppm (T5) beside T0 which represents the control. The experiment was arranged in a randomized complete block design with three replications. Application of GA3 at 100 ppm caused an increase in plant height (50.30 cm), leaves number (50), fruits number (29.50 per/plant), fruit weight (1.52 kg/plant),  ascorbic acid (1.80 mg/100gm) and total soluble solids (4.10 Brix) among the different treatments of GA3.

Keywords: Gibberellic acid (GA3), Tomato, Yield, Quality, Bangladesh.   

Full paper in English: PDF