Akademik Veri Yönetim Sistemi
Tezin Türü: Doktora
Tezin Yürütüldüğü Kurum: Erciyes Üniversitesi, Fen Bilimleri Enstitüsü, Tarım Bilimleri ve Teknolojileri (in English), Türkiye
Tezin Onay Tarihi: 2023
Tezin Dili: İngilizce
Öğrenci: RAWYA MEZAAL MAHMOOD AL-AZZAWI
Danışman: Ali Irfan Ilbaş
Özet:
This study was conducted to
determine the response of maize (Zea
mays L.) under different sprinkler irrigation times and plant densities
conditions in Kirkuk Governorate / Iraq in 2021 and 2022. In the first
experimental year (in 2012), in order to
identify the variety with higher yield and strength under the limited
irrigation conditions, an experiment was conducted in a randomized block design
(RCBD) with three replications. Five approved yellow maize cultivars (AlFajer,
AlMaha, AlSafa, Buhooth106 and Sara) were used and irrigated three times (2, 4,
and 6 times), using the pivot sprinkler method. According to the result of this
experiment, Buhooth106 variety had the highest yield (7.23 kg ha⁻ˡ).
Based on this result, Buhooth106 variety was selected for using as
material in the second trial year.
In 2022, a second field
experiment was conducted according to the split-plot design in randomized
complete block (RCBD), using Buhooth106 variety. In this experiment treatment
were the applying of four plant densities ((53333, 66666, 88888, and 133333
plants ha⁻¹)
and in three sprink irrigation times (2, 4, 6 days) and seeds were planted on
Mart 20, 2022. The three sprink irrigation
times in the main boards and application of plant densities in sub plots were
placed.
According to result of this
study, the plant densities (53333 and 66666 plants ha⁻ˡ) were superior to in terms of
leaf area (4801.67 and 4361.33 cm²), number of
grains per ear (450.3 and 433.0 grains), weight of
300 grains (84.77, 79.20 g), and yield
per plant (134.20 g), while the
two plant densities of 133333 and 88888 plants ha⁻ˡ were superior in plant height (186.64 and
181.09 cm) and plant yield per unit area , (9.29 and
8.19 t ha⁻¹).
In considering plant density
avarage, the 2 days interval pivot irrigation application resulted with the
highest leaf area, the highest weight of 300 grains, and the highest yield per
unit area, as 2 cm², 437 grains, 79.48 g and 9.21 t ha⁻ˡ respectively, but, the 6-day irrigation treatment
gave a yield of 6.64 t ha⁻ˡ, this less yield can considered an accopmlished
result only compared to the lack of irrigation.
The application of irrigation interval as 2 days
provided the highest yield as 10.61 t ha⁻ˡ, when a plant density arranged as 133333 plants
ha⁻ˡ. On the other side, the irrigation interval of 6 days
gave
6.84 t ha⁻ˡ in the plant density of 88888 plants ha⁻ˡ ,that result was the best in limited irrigation
interval. And, this treatments combination was characterized with the
homogeneity of its seeds on the ear and the large size of the grain. In conclusion, it is
possible to use little irrigation when only the appropriate plant density was
chosen to give an acceptable yield from an economic point of view.