Establishment of Critical Ranges of Inorganic Nutrition Contents in Leaves of Watermelon(Cucurbita citrullus L.) in Protected Cultivation
2008
Lee, J.Y. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Park, J.H. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Jang, B.C. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Lee, K.S. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Hyun, B.K. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Hwang, S.W. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Yoon, Y.S. (Kongju National University, Kongju, Republic of Korea) | Song, B.H. (Chungbuk National University, Cheongju, Republic of Korea)
This study was carried out to elucidate the relationship between yields and inorganic nutrient contents, and then establish of critical range of inorganic nutrient contents in leaves of watermelon in protected cultivation in Gochang from 2004 to 2006. In considering the yields and nutrient contents of watermelon, the critical ranges of macro-nutrient contents in leaves of watermelon at 20 days after transplanting were in N 5.0~6.6%, P 0.30~0.57%, K 3.5~4.2%, Ca 1.7~3.8% and Mg 0.20~0.42%, respectively. The critical ranges of micronutrient content, such as Fe, Mn, Zn, Cu and B, were not found the regular trend with different growth stages. However, the critical range of micronutrient contents in leaves of watermelon at 20 day after transplanting were in Fe 96~128, Mn 67~201, Zn 40~60, Cu 6~9 and B 41~82mg kg-¹, respectively. Finally, these results might be used at the indicator for critical nutrient contents for diagnosis of nutritional disorder in watermelon in protected cultivation.
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