EFFECT OF NITROGEN FERTILIZER SPLITTING AND WATER MANAGEMENT ON PRODUCTIVITY AND GRAIN QUALITY OF GIZA 179 RICE CULTIVAR | ||
| Menoufia Journal of Plant Production | ||
| Article 1, Volume 6, Issue 10, October 2021, Pages 465-477 PDF (553.33 K) | ||
| Document Type: original papers | ||
| DOI: 10.21608/mjppf.2021.203380 | ||
| Authors | ||
| I.S. El-Refaee; Hasnaa A. Ghazy; I. A. Sheta | ||
| Agric. Res. Center, Field Crops Res. Inst., Rice Res. & Train. Center, 33717 Sakha – Kafr El-Sheikh, Egypt. | ||
| Abstract | ||
| A Field experiment was initiated during the 2018 and 2019 seasons at The Experimental Farm of Sakha Research Station, Kafr El-Sheikh, Egypt. The purpose of this study is to determine a more suitable nitrogen fertilization mode under water deficit for improving the grain yield and quality of Giza 179 rice cultivar. The experiment was laid out in a split-plot design with three replications. Three irrigation treatments were distributed in the main plots namely, continuous flooding (CF), irrigation every 4 and 8 days after the disappearance of ponded water (DADPW). However, the subplots were occupied by five splits of nitrogen application, i.e., T1 (all dose as basal), T2 (½ as basal + ½ top dressing at the mid tillering stage), T3 (½ as basal + ¼ top dressing at mid tillering + ¼ top dressing at panicle initiation), T4 (⅓ as basal+ ⅓ at mid tillering + ⅓ at panicle initiation), and T5 (⅔ as basal + ⅓at mid tillering). The results revealed that growth, grain yield and its components and grain quality were significantly increased under CF without significant differences with 4-DADPW compared to the 8-DADPW treatment. The T3 and T4 treatments registered higher values of growth and grain yield than other treatments. Continuous flooding consumed the highest amount of irrigation water. However, the lowest amount of water was received by 8-DADPW treatment and gave reasonable water productivity in both seasons. Generally, in the case of the shortage of irrigation water, it is possible to use irrigation as 4-DADPW with nitrogen application as T4 or T3, leading to high values of growth, grain yield and quality, and water productivity for Giza 179 cultivar. | ||
| Keywords | ||
| Rice; irrigation management; nitrogen fertilizer; water productivity; grain yield | ||
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