Haider Hasan(1), Ghiath Alloush(2)*, and Waseem Adlah(1)
(1). Al-Gab Agriculture Research Center, General Commission for Scientific Agricultural, Research GCSAR, Damascus, Syria
(2). Department of Soil and Water Sciences, Faculty of Agricultural Engineering, University of Tishreen, Latakia, Syria.
(*Corresponding author: Haider Hasan. E-mail: haider7220387@gmail.com).
Received: 21/04/2022 Accepted: 19/06/2022
Abstract:
A filed experiment was conducted in Jeb Ramlah- Center for Agricultural Research in Al-Ghab during summer season 2019 according to complete randomized design (RCBD). The aim was to evaluate the effect of increasing application rates of nitrogen fertilizer (N: 0, 60, 120, 180 and 240 kg N/h-1), and boron application (B0=0, B1= B added to the soil (2 kg/h-1), B2= foliar boron (1%)), on productivity components of maize crop (Zea mays L.) cv. Salameha 1. The weight of ears on plant, number of raw on ear, number of grain in a raw, weight of 100 grain, grain productivity (kg/h-1), biological hay (kg/h-1), and percent of protein in grain. The results show significant response of all productivity traits with increasing rates of N fertilization. Ear weights/plant, number of raw on ear, number of grain in a raw, and weight of 100 grain were in the control treatment N0B0 681g, 11.6 raw, 25.9 grain/raw, and 29.4 g/100 grain; and increased to 988, 12.4, 33.7, and 36.6 in treatment N240B0. Boron addition in either ways didn’t show a clear significant effect except for ear weight. Ear weight was in N240B0 988 g and increased significantly to 1229 g when N was applied to the soil (treatment N240B1), and to 1179 g when boron was foliar application. The highest ear weight obtained was 1378 g when N applied at a rate of 180 kg/h-1 and foliar boron application (treatment N180B2). Grain yield increased significantly with N fertilization from 6729, 7572, 7887 kg/h-1 in the control treatments to 11894, 11156, and 12844 kg/h-1 with 180 kg N/h-1, respectively. Yield was not increased with increasing N rate of application to 240 kgN/h-1. The response of biological yield was similar to grain yield. Biological yield was 48.5, 49.2, and 49.2 ton/h-1 in the control treatments (N0B0, N0B1, and N0B2) and increased in response to nitrogen application (180 kg N/h-1) to 65.4, 67.6, and 91.2 ton/h-1. The effect of boron application was most evident on protein content of grain which was 12.94 % in B240B0 and reaches 16.81 % for the same nitrogen application rate and boron was foliar application.
Key words: Maize, Nitrogen fertilization, Productivity Traits, Grain Yield, Biological Yield
Full paper in Arabic: pdf