Mohammad Manhal Al-Zubi *(1) Haitham Eid(2) Mohammad Hakkoun(1) Mahmoud Barhoum(2) Razan Karfoul(2) Mahmoud Asaad(2) Khattar Darwish(2) Nawar Al Jrdi(2) and Yamen Ahmad(2)
(1). Administration of Water Resources, General Commission for Scientific Agricultural Research GCSAR, Damascus, Syria.
(2). Tartous Agricultural Research Center, GCSAR, Damascus, Syria.
(*Corresponding author: Dr. Mohammad Manhal Al-Zubi. E-Mail: manhalzo@yahoo.com).
Received: 01/02/2018 Accepted: 14/04/2018
Abstract
The effect of irrigation with drainage water on the productivity of quinoa variety (NSL-106398), and determination of fertilizer and water requirements were studied. A field experiment was conducted at Zahed Research Station, Tartous Research Center for two growing seasons 2016 and 2017. The experiment was laid out in Split Plot Design with three replications. Tow water quality treatments were applied [drainage water (DW) and fresh water (FW)], and three fertilizer levels were used NPK1 (80 kg N/ha, 30 kg P2O5/ha, 30 kg K2O /ha), NPK2 (100 kg N/ha, 40 kg P2O5/ha, 40 kg K2O /ha), and NPK3 (120 kg N/ha, 50 kg P2O5/ha, 50 kg K2O/ha). The results showed a significant increasing in the soil conductivity EC under drainage treatments DW (1.15 dS/m) compared to the fresh water FW treatment (0.68 dS/m) in the first season, whereas the differences were not significant in the second season. Soil was analyzed at the end of the two seasons, the results showed significant increasing in total nitrogen when treatments irrigated with DW (0.153%) compared to the treatments irrigated with FW (0. 132%) in the first season. While phosphorus and potassium were not significantly increased when fertilization of these two elements was increased within the treatments of water quality and mineral fertilization treatments, but the difference in available potassium in the second season, was significant within water quality treatments. The grain yield regarding DW treatment was significantly increased (2.65 ton/ha) compared to the FW (2.055 ton/ha), also the grain yield significantly increased by mineral fertilization treatments (2.04, 2.347, 2.67 ton/ha respectively). Whereas in the second season DW increased the grain yield (2.22 ton/ha) compared to the FW (2 ton/ha). The grain yield increased significantly in treatment NPK3 (2.56) compared to the treatments NPK1 and NPK2 (2.023, 1.745 ton/ha respectively). Straw productivity was increased in mineral fertilization treatments (10, 9.83, 10.42 ton/ha) in the first season. Furthermore, results showed that water use efficiency in the treatment NPK3 was the best for both water types DW, and FW (1.3 and 1 kg/m3, respectively). Therefore, the study recommends that the water requirement of quinoa under the conditions of Tartous Governorate was 2000 m3/ha, and the fertilizer recommendation was (120 kg N/ha, 50 kg P2O5/ha, 50 kg K2O /ha)
Key wards: Drainage water, Quinoa, Water requirement, Mineral fertilizers.
Full paper in Arabic: PDF