Saddon Ibrahim, Nagham
(2016)
Effects Of Gibberellic Acid, Proline And Humic Acid On The Growth, Yield And Chemical Composition Of Two Zea Mays L. Cultivars (Baghdad-3 And Fajir-1).
PhD thesis, Universiti Sains Malaysia.
Abstract
Tanaman jagung atau Zea mays dianggap sebagai salah satu daripada bijirin utama yang dimakan oleh manusia di seluruh dunia. Permintaan untuk jagung telah meningkat secara mendadak dan menerima banyak perhatian kerana kepentingannya dari segi ekonomi dan penggunaan. Oleh itu, kajian ini dijalankan untuk mengkaji kesan asid gibberellik, proline dan asid humik, dan kesan sinergi mereka terhadap pertumbuhan, hasil dan komposisi kimia dua kultivar Zea mays L. di Iraq, iaitu Baghdad-3 dan Fajir-1. Suatu ujikaji lapang dilakukan ke atas tanah liat gembur dari bulan Mac hingga Julai 2014 di stesen penyelidikan Ghlibia, Diyala, Baghdad. Satu Reka Bentuk Blok Lengkap Rawak (RCBD) yang terdiri daripada 18 rawatan telah dijalankan untuk setiap kultivar jagung dan setiap rawatan diulang sebanyak tiga kali. Rawatan tersebut telah dijalankan dengan asid gibberellik (0, 100, dan 200 mg/l), proline (0, 100, dan 200 mg/l) dan asid humik (0 dan 2.4 g/l). Daun-daun tumbuhan telah disembur sebanyak dua kali dengan asid gibberellik dan proline. Aplikasi pertama adalah semasa peringkat selepas percambahan 4-6 daun, manakala aplikasi kedua adalah pada awal peringkat berbunga.
The corn plant or Zea mays is considered as one of the major food grains that have been consumed by people around the world. The demand for corn has increased dramatically and gained lots of attentions due to its economic importance and utility. Thus, this study was conducted to investigate the impacts of gibberellic acid, proline, and humic acid, and their synergistic effect on the growth, yield and chemical composition of two Iraqi cultivars of Zea mays L., Baghdad-3 and Fajir-1. A field experiment was carried out in a clay loam soil from March to July 2014 at the Ghlibia research station, Diyala, Baghdad. A Randomised Complete Block Design (RCBD) consisted of 18 treatments for each cultivar of corn was conducted and each treatment was replicated three times. The treatments were conducted with gibberellic acid (0, 100, and 200 mg/l), proline (0, 100, and 200 mg/l) and humic acid (0 and 2.4 g/l). Gibberellic acid and proline were sprayed twice on the plant leaves. The first application was during the stage of 4–6 leaves post germination, while the second was at the beginning of flowering stage.
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