Vanessa Boudjeka Guemkam, Alice Tchiazé Ifoué, William Djeukeu Asongni, Adelaide Demasse Mawamba, Gisèle Loé-Etame, Condurache Nina-Nicoleta, Milea Ștefania-Adelina, Cotarlet Mihaela, Fabrice Dongho Dongmo, Inocent Gouado, Iordachescu Gabriela
Research Laboratory of Biotechnology, University Institute of Technology University of Douala Douala Cameroon.
Food Science and Nutrition Laboratory, Faculty of Sciences University of Douala Douala Cameroon.
Food Sci Nutr. 2024 Jul 9;12(9):6742-6751. doi: 10.1002/fsn3.4294. eCollection 2024 Sep.
The nutritional and functional properties of squashes are influenced by various factors, such as the stage of plant development, soil composition, and type of fertilizer. This study evaluates the impact of various organic fertilizers on D. properties. For this purpose, squashes were fertilized using Ash at 10 kg/25 m, bovine compost at 62.5 kg/25 m, and a 1:1 mixture of ash and bovine compost. Negative control (without fertilizers) and positive control (NPK 20-10-10 at 2 kg/25 m) were included. Post-harvest, the yield, carotenoids, phenolic compounds, flavonoids, and antioxidant activities were assessed. Ash fertilizer resulted in the highest number of fruits per plant (2.20 ± 0.16). Regarding flavonoids, the bovine compost yielded the highest level (428.67 ± 2.62 mg/100 g of edible portion). The mixture of ash and bovine compost produced fruits with the highest content of total carotenoids, β-carotene, lycopene, and total phenolic compounds (249.7 ± 3.68, 219.80 ± 3.41, 26.07 ± 0.41, and 575.00 ± 9.95 mg/100 g of edible portion, respectively). Moreover, carotenoids extracted from this mixture exhibited the highest inhibition of DPPH and ABTS free radicals (30.87 ± 0.65 and 47.32 ± 1.30%, respectively). This research suggests that the use of a mixture of ash and bovine compost could significantly enhance the yield of squashes and their phytochemical and antioxidant potential.
南瓜的营养和功能特性受多种因素影响，如植物发育阶段、土壤成分和肥料类型。本研究评估了各种有机肥料对南瓜特性的影响。为此，分别以10千克/25平方米的草木灰、62.5千克/25平方米的牛粪堆肥以及草木灰与牛粪堆肥1:1的混合物对南瓜施肥。设置了阴性对照（不施肥）和阳性对照（施用量为2千克/25平方米的NPK 20 - 10 - 10）。收获后，对产量、类胡萝卜素、酚类化合物、黄酮类化合物和抗氧化活性进行了评估。施用草木灰肥料的单株结果数最多（2.20±0.16个）。在黄酮类化合物方面，牛粪堆肥处理的含量最高（428.67±2.62毫克/100克可食部分）。草木灰与牛粪堆肥的混合物所产果实的总类胡萝卜素、β - 胡萝卜素、番茄红素和总酚类化合物含量最高（分别为249.7±3.68、219.80±3.41、26.07±0.41和575.00±9.95毫克/100克可食部分）。此外，从该混合物中提取的类胡萝卜素对DPPH和ABTS自由基的抑制作用最强（分别为30.87±0.65%和47.32±1.30%）。本研究表明，使用草木灰与牛粪堆肥的混合物可显著提高南瓜产量及其植物化学物质含量和抗氧化潜力。
