Influence of Organic Fertiliser Management on Growth, Yield Performance, and Quercetin Content of Four Onion (Allium cepa L.) Cultivars under Highland Agroecological Conditions of Cameroon

The productivity and nutritional quality of onion (Allium cepa L.) are influenced by cultivar characteristics and nutrient management practices. However, limited information exists on the interaction between onion cultivars and organic fertiliser sources in determining yield performance and quercetin accumulation under highland agroecological conditions of Cameroon. This study evaluated the influence of organic fertiliser management on growth, yield and quercetin content of four onion cultivars grown in Bambili, North-West Region of Cameroon. The experiment was conducted using a 4 × 3 factorial arrangement in a Randomised Complete Block Design (RCBD) with three replications. Four cultivars (Red Bombay, Red Creole, Texas Grano and Pusa White Flat) were evaluated under three fertiliser treatments: cow dung, fowl droppings and an unfertilised control. Data on stem diameter, plant height, number of leaves, bulb yield and quercetin content were analysed using analysis of variance (ANOVA), and treatment means were separated using Tukey’s HSD test at 5% probability. Cultivar, fertiliser treatment and their interaction significantly influenced growth, yield and quercetin content. Organic fertiliser application improved vegetative growth and bulb yield compared with the control, with fowl droppings producing the best overall response. Red Bombay showed superior performance, recording the highest stem diameter (10.79 mm), plant height (58.32 cm), bulb yield (129.96 g plant⁻¹) and quercetin content (31.30 mg plant⁻¹). The highest yield (158.63 g plant⁻¹) and quercetin concentration (33.37 mg plant⁻¹) were obtained from Red Bombay treated with fowl droppings. The study demonstrates that integrating suitable cultivar selection with organic fertiliser management can improve onion productivity and nutritional quality under highland conditions of Cameroon.

Allium cepa L., bulb yield, Cameroon, fowl droppings, onion cultivars, organic fertiliser, quercetin, sustainable agriculture

1. Agegnehu, G., Srivastava, A. K., & Bird, M. I. (2017). The role of biochar and biochar-compost in improving soil quality and crop performance: A review. Applied Soil Ecology, 119, 156–170. [Google Scholar] [Crossref]

2. Brewster, J. L. (2018). Onions and Other Vegetable Alliums (3rd ed.). Wallingford, UK: CABI. [Google Scholar] [Crossref]

3. Diacono, M., & Montemurro, F. (2010). Long-term effects of organic amendments on soil fertility: A review. Agronomy for Sustainable Development, 30, 401–422. [Google Scholar] [Crossref]

4. FAOSTAT. (2020). FAOSTAT Statistical Database: Crops and livestock products. Food and Agriculture Organization of the United Nations, Rome, Italy. [Google Scholar] [Crossref]

5. Gong, X., Li, S., Sun, X., Wang, L., & others. (2020). Effects of organic amendments on soil fertility, crop productivity and soil microbial communities. Agriculture, Ecosystems & Environment, 295, 106902. [Google Scholar] [Crossref]

6. Griffiths, G., Trueman, L., Crowther, T., Thomas, B., & Smith, B. (2002). Onions—A global benefit to health. Phytotherapy Research, 16(7), 603–615. [Google Scholar] [Crossref]

7. Khan, A., Tan, D. K. Y., Afridi, M. Z., Luo, H., Tung, S. A., Ajab, M., & Fahad, S. (2019). Nitrogen fertility and sustainable crop production: A review. Agronomy, 9, 139. [Google Scholar] [Crossref]

8. Kumar, R., Singh, V., & others. (2022). Influence of genotype and nutrient management on growth, yield and bioactive compounds in onion (Allium cepa L.). [Google Scholar] [Crossref]

9. Lanzotti, V. (2006). The analysis of onion and garlic. Journal of Chromatography A, 1112(1–2), 3–22. [Google Scholar] [Crossref]

10. Mbanga, L. A., Boeyeo, A. C., & Mbuh, B. K. (2021). Rurbanisation and agricultural dynamics in Bambili and Bambui, North West Region of Cameroon. Journal of Arts and Humanities, 5(1). [Google Scholar] [Crossref]

11. Mogren, L. M., Olsson, M. E., & Gertsson, U. E. (2007). Quercetin content in field-cured onions (Allium cepa L.): Effects of cultivar, lifting time and nitrogen fertilisation. Journal of Agricultural and Food Chemistry, 55(23), 9569–9574. [Google Scholar] [Crossref]

12. Nile, S. H., Park, S. W., & others. (2020). Onion (Allium cepa L.) bioactive compounds and their health-promoting properties. [Google Scholar] [Crossref]

13. Palm, C. A., Gachengo, C. N., Delve, R. J., Cadisch, G., & Giller, K. E. (2001). Organic inputs for soil fertility management in tropical agroecosystems: Application of an organic resource database. Agriculture, Ecosystems & Environment, 83, 27–42. [Google Scholar] [Crossref]

14. Rodríguez Galdón, B., Rodríguez Rodríguez, E., & Díaz Romero, C. (2008). Flavonoids in onions (Allium cepa L.) grown under different environmental conditions. Journal of Food Composition and Analysis, 21, 196–202. [Google Scholar] [Crossref]

15. Roldán, A., Salinas-García, J. R., Alguacil, M. M., & Caravaca, F. (2018). Soil sustainability and organic amendments in agroecosystems. Soil Biology and Biochemistry, 123, 1–10. [Google Scholar] [Crossref]

16. Shock, C. C., Feibert, E. B. G., & Saunders, L. D. (2019). Onion production and nutrient management. Oregon State University Extension Publications. [Google Scholar] [Crossref]

17. Slimestad, R., Fossen, T., & Vågen, I. M. (2007). Onions: A source of unique dietary flavonoids. Journal of Agricultural and Food Chemistry, 55(25), 10067–10080. [Google Scholar] [Crossref]

18. Sullivan, D. M., & Nair, T. S. (2011). Nutrient Management for Onions. Oregon State University Extension Service. [Google Scholar] [Crossref]

19. Upadhyay, R. K. (2016). Nutraceutical, pharmaceutical and therapeutic uses of onion (Allium cepa L.): A review. International Journal of Green Pharmacy, 10(1), 1–10. [Google Scholar] [Crossref]

20. Woisky, R. G., & Salatino, A. (1998). Analysis of propolis: Some parameters and procedures for chemical quality control. Journal of Apicultural Research, 37(2), 99–105. [Google Scholar] [Crossref]

21. Yoldas, F., Ceylan, S., Yagmur, B., & Mordogan, N. (2011). Effects of organic and inorganic fertilizers on yield and mineral content of onion (Allium cepa L.). African Journal of Biotechnology, 10(55), 11488–11492. [Google Scholar] [Crossref]

22. Zhishen, J., Mengcheng, T., & Jianming, W. (1999). The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals. Food Chemistry, 64(4), 555–559. [Google Scholar] [Crossref]

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