Growth and Nutrient Uptake of 'Seolhyang' Strawberry (Fragaria × ananassa Duch) Responded to Elevated Nitrogen Concentrations in Nutrient Solution

This research tested five modified Hoagland solutions for proper fertility management of nitrogen in 'Seolhyang' strawberry cultivations. The changes of nutrient solutions were in total nitrogen concentrations (meqㆍL-¹) such as 0 (NO₃-), 2.5 (NO₃-), 5 (NO₃-), 10 (7.5NO₃- + 2.5NH₄+) and 15 (10NO₃- + 5NH₄+). The fresh weight and NO₃-N concentrations in petiole sap responded to the elevated nitrogen concentrations in fertilizer solution in quadratic (y=7.10+2.668x-0.115x², R²=0.7983***) and linear (y=26.14+5.245x, R²=0.6083***), respectively. The dry weight and N content of the above ground plant tissue responded to the elevated nitrogen in quadratic (y=2.140+0.492x-0.022x², R²=0.6110***) and linear (y=0.569+0.033x, R²=0.6952***), respectively. In our experiment the solution with 5 meqㆍL-¹ of NO₃- showed positive results in both dry and fresh weight productions. However, a future research about modification of this solution and growth and nutrient uptake response is necessary to achieve better growth of 'Seolhyang' strawberry.