Impact of irrigation intervals with fertigation timing on Washington navel orange tree productivity and leaf nutrient content. | ||||
| Horticulture Research Journal | ||||
| Volume 2, Issue 1, June 2024, Page 115-129 PDF (636.53 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/hrj.2024.370858 | ||||
 View on SCiNiTO | ||||
| Abstract | ||||
| Recently, as a result of citrus trees in some Nubaria region expose to intermittent forced irrigation, study in Egypt evaluated the effects of prolonged irrigation intervals and fertilizer doses timing , on twelve-year-old Washington navel orange trees on sour orange, under drip irrigation system (Nile river water) in Al- Bustan region, El-Behira governorate during 2020, 2021and 2022 seasons. Ten treatments contained T0: every day and fertigation done 30 min-before end irrigation period (control), T1, T2, T3 were every two, three and four days, respectively. Each of T1, T2, T3 had three timing of fertigation (a) 15 min - after beginning, (b) at middle time and (c) 15 min - before the end of irrigation period. Treatment were arranged in complete randomize block design. Irrigation every four days plus fertilizers at the 3rd time significantly increased leaf proline content, reduced fruit peel %, TSS %, TSS/Acid ratio &V.C .Irrigation every three days plus fertilizers at the 3rd time improved leaf macro- elements% , fruit weight, number of fruits, yield as kg / tree and reduced juice acidity. Irrigation every two days plus fertilizers at the 3rd time gave highest number of fruitlets in May, then decreased and fixed in June & July. Control treatment significantly reduced fruit-splitting% during August, September, October &November, while irrigation every four days plus fertilizers at the 1st time was the highest. Moreover, the highest fruit-splitting values noticed at September for all studied treatments. Irrigation every two days plus fertilizers at the 1st time increased fruit juice. | ||||
| Keywords | ||||
| Navel orange; irrigation intervals; Fertilizer times; yield & fruit-splitting% | ||||
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