Sweet potato as a promising strategic crop in Egypt: Effect of different organic fertilizers and boron on sweet potato under decreasing levels of potassium fertilization | ||
| Damietta Journal of Agricultural Sciences | ||
| Volume 4, Issue 3, August 2025, Pages 45-55 PDF (1.18 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/djas.2025.452635 | ||
| Authors | ||
| A. Hamaiel; Mahmoud Abdelhady* ; Asmaa Elghareeb | ||
| Horticulture Department، Faculty of Agriculture، Damietta University | ||
| Abstract | ||
| a field trial was implemented to evaluate the effect of different organic fertilizers (control, chicken manure ChM, and compost, each applied at 12.0 tons ha-1) and boron supplementation (applied as boric acid at 80 mg L-1 or not applied) on sweet potato grown under decreasing levels of mineral potassium fertilization (100, 75, and 50% of recommended potassium dose KRD). Growth criteria such as plant height, fresh and dry weights as well as total chlorophyll content and NPK concentrations were assessed after 100 days from transplanting. Additionally, tuber yield and its components, such as average root weight and length, and total tuber yield as well as quality traits (e.g., carbohydrate, starch content, total sugar, vitamin C), were evaluated after 140 days from transplanting. The compost outperformed the ChM treatment, as both organic fertilizers significantly improved growth performance and yield attributes compared to the control. The obtained results also show that the highest values of growth performance and tuber yield attributes were realized with 100% of KRD, and the values decreased as the KRD decreased. Moreover, plants treated with boron element exhibited superior growth performance and yield attributes compared to those without boron. Notably, plants grown under 75% KRD, in combination with organic fertilizers (either ChM or compost) and boron, demonstrated growth performance and tuber yield better than those cultivated under the 100% KRD without both organic fertilizers and boron application. This suggests that partial substitution of mineral potassium with organic amendments and boron can optimize nutrient efficiency and sustain productivity. | ||
| Keywords | ||
| compost; boron; potassium fertilization | ||
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