Influence of Fertilizer Rate on Swollen Stem Formation (“Bulbing”) and Vitamin C Content in Different Kohlrabi Cultivars

Mark Iradukunda Author
08/16/2021 Added
9 Plays


In this greenhouse study, we fertilized four potted kohlrabi cultivars with a common water-soluble greenhouse fertilizer (Peters Professional 20-10-20) at zero, one-half recommended, recommended, and double recommended rates where the recommended rate plants received 308mg each week in irrigation water. Results showed that plants of all cultivars that received the double rate of fertilizer had the highest yield with a fresh swollen stem weight of 448 g, while plants that received no fertilizer had the lowest yield with 21.2 g and they were visibly nutrient deficient. An Increase in fertilizer rate increased the vitamin C content where the total vitamin C per swollen stem averaged 6853 mg for the double rate and 846 mg for the zero rate. The results from this study will help farmers to effectively apply fertilizers to increase kohlrabi yields and vitamin C content while doing less harm to the environment caused by excessive fertilizing. In return, this will help people to get more vitamin C sources which may improve their health.

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