Ghiath A. Alloush(1), Osama Hatta*(1), and Ali Yousif(1)
(1). Department of Soil and Water Sciences, Faculty of Agriculture, Tishreen University
(2). Researcher at the General Commission of Agricultural Research, Lattakia, Syria.
(*Corresponding author: Dr. Osama Hatta, Email: osamahatta87@gmail.com)
Received: 8/10/2022 Accepted: 29/11/2022
Abstract:
A pot experiment was conducted on soft wheat (cv. Sham 10) in a greenhouse on Tishreen University campus in season 2021-2022. The experiment included 5 levels of phosphorus applications (0-30-60-90-120 mg P/kg soil), which correspond to (0-20-40-60-80 and 100 kg P/h-1), as according to soil weight in pots. Pots were completely randomized on the experimental plot. Seeding was at a rate of 120 kg/h-1 (9 plants/pot). At harvest, readings for growth and productivity traits were recorded. Plant parts (straw, grain and roots) were oven-dried and P contents were determined. P removal was estimated and efficiencies of growth, productivity and P utilization efficiencies were calculated. Number of fertile tellers increased with increasing level of P application reaching maximum number at 75 kg P/h-1, an increase rate of 3 times compared to the control. The application rate of 100 kg P/h-1 increased significantly number of grain in main spike to reach 42.2 grain per spike, an increase rate of 87% compared to the control. The effect P application was more evident on spike in tellers in which number and weight of grain was increased gradually. This enhancement in the productivity trait was reflected on grain yield. The highest yield reached was 13431 kg/h-1 at 100 kg P/h-1, an increase by about 170% compared to the control treatment. No significant differences were observed in hay weights and harvest index between 75 and 100 kg P/h-1, while phosphorus utilization efficiency (PUE) was remarkably increased at 75 kg P/h-1 reaching 45%, and decreased to 33% with 100 kg P/h-1. Physiological efficiency (PE) was not significantly different with differing level of P application, ranging between 17.7 and 19.3 kg grain/kg absorbed P.
Key Words: Soft Wheat, Sham 10, Phosphorus Fertilization, Growth and Productivity Trait, PUE, Calcareous Soil.
Full paper in Arabic: pdf