Photochemical Characteristics of Radish (Raphanus sativus) Leaf Grown under Different Nitrogen (N) Fertilization

Radish is a nutritionally balanced vegetable and has a short growing period, so it is cultivated all over the world. [1] Radish, one of the crops with a lot of fertilizer requires a greater amount of nitrogen (N) than phosphorus (P) and potassium (K) during the growing season. [2] Nitrogen is an essential element for plant growth, and it has a high chlorophyll content and productivity enhancement effect in the body, so proper fertilization is required for radish cultivation. [3] [4] In this study, growth health was evaluated by using radish growth investigation and photochemical reaction analysis by nitrogen fertilization level. Radish was cultivated from September to November 2021 at the farm affiliated with Hankyong University (Anseong-si, Gyeonggi-do). Nitrogen (urea) treatment was performed three times at 5 levels (0kg N ha-1, 117kg N ha-1, 234kg N ha-1, 468kg N ha-1, 968kg N ha-1) (basis, 1st fertilization, 2nd fertilization), and the control was based on 234kg N ha-1. Chlorophyll fluorescence analysis was measured after 30 minutes of dark treatment of leaves using Fluorpen FP-100 (PSI, Czech).