Effect of Plant Density and Nitrogen Fertilization on Some ‎Morphological, Physiological and Productivity Characteristics ‎of sorghum bicolor L.‎

Mohamed Abd Alaziz(1) and Fatema Antar*(1)

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

(*Corresponding author: Eng. Fatema Antar. E-Mail: anterfatemah@gmail.com). 

Received: 28/11/2018                               Accepted: 06/02/2019

Abstract

The research was carried out in the coastal area at Bauqa Farm, and at the laboratories of Faculty of Agriculture, Tishreen University, during the season 2018 in order to study the effect of plant density and nitrogen fertilization and their interaction on some morphological, physiological and productivity parameters of sorghum plant to obtain the highest grain yield. Jumbo variety  was used which obtained from General Organization of Seed Multiplication in Latakia. The design of the experiment was Randomized Completely Block Design (RCBD) with the arrangement of split plot design with three replicates. The density treatments were distributed in the main plots (3.33, 5 and 10 plants/m2), while nitrogen fertilization levels were allocated in the sub plots (200, 300 and 400 kg/ha) in addition to the control treatment without nitrogen addition. The density of 10 plants / m2 and the  nitrogen fertilization of 300 kg/ha gave the highest grain yield (ton/ha) under the conditions of the experiment. While the density of 3.33 plants/m 2 and the nitrogen addition of 400 kg/ha gave the  highest length of the plant number of leaves/plant, number of grains/rosset and weight of 100 seeds. The grain yield correlated positively and significantly with rosset length (r=0.541**), grains number (r=0.509**),  area index (r=0.502 **) and the rosset weight (r=0.456 **). Thus it is possible to improve the productivity by improving the mentioned traits above due to the positive correlation with them.

Key words: Sorghum bicolor, Plant density, Nitrogen fertilization, Yield, Morphological traits.

Full paper in Arabic: PDF