Effect of seed rate on vegetative growth and yield properties of two varieties of spinach and weeds

Effect of seed rate on vegetative growth and yield properties of two varieties of spinach and weeds


Sonia Hiwa Othman (1); Bakhtyar Abdulla Hamasaaid(2); Soran Othman Abdulla(2)



(1) Department of Horticulture, Faculty of Agricultural Sciences, University of Sulaimani, Kurdistan Region, Iraq.
(2) Department of Plant Protection, Directorate of Research Center in Sulaimani.





Article info

Original: 17 May.  2015

Revised:23 July. 2015

Accepted:30 August.  2015

Published online:  20 March.  2016





Key Words:

Seed rate
Weed,
Spinach
Local variety
Syrian variety.


Abstract
An experiment was conducted at the Agricultural Research Station in Bakrajo-
Sulaimaniyah, from 7th October, 2013 to 24th March, 2014 to investigate the effect of
different seed rates (16, 28, 40 Kg ha-1) on a number of weeds m-2 and their dry weight.
Furthermore, some vegetative and yield characters of two spinach varieties (local and
Syrian) were measured. The experiment designated in factorial randomized complete
block design (RCBD-factorial). Comparisons between the means of the characters were
carried out according to Duncan’s Multiple Range Test at the 5 % level.
Results revealed that 40kg ha-1 exhibited significant differences in reducing the number
and dry weight of weeds at both growth stages [100 and 125 days after spinach seed
sowing (DAS)] by 67.86 and 75.82% for weed’s number and for weed’s dry weight
(67.57 and 48.27%) as compared to 16 kg ha-1. Also 40 kg ha-1 was significantly superior
in increasing accumulative yield (kg m-2), Dry weight (g m-2), leaf area (cm2 plant-1),
spinach number m-2 and leaf number plant-1 by 60.91, 66.56, 57.33, 47.93 and 28.88%
as compared to 16 kg ha-1, respectively.
The local variety got the highest values in decreasing the number and dry weight of weeds
at both growth stages 100 and 125 DAS by 43.94 and 51.76% for weed’s number and by
19.46 and 30.49% for weed’s dry weight, compared to the Syrian variety, respectively.
The local variety showed significant differences, as compared to Syrian variety, in
accumulative yield (kg m-2), dry weight (g m-2), leaf area (cm2 plant-1), spinach number
m-2 and leaf number plant-1 by 49.40, 47.06, 38.64, 30.97 and 21.86%, respectively. To
sum up, seeding rate of 40 kg ha-1 was best in reducing the number and dry weight of
weeds, and it caused significant increases in all studied parameters.






Ċ
Ramyar Abdolrahman Taimur Ismail,
Mar 20, 2016, 4:54 AM