Open-field Experimental Warming and Precipitation Manipulation System Design to Simulate Climate Change Impact

摘要

The objective of this study was to estabhsh an open-field experimental warming treatment and precipitation manipulation system to simulate climate change impact for Finns densiflora seedlings based on a climate change scenario in Korea. Two-year-old seedlings were planted in a nursery in April, 2013. The air temperature of warmed plots (W) was set to increase by 3.0“C compared to control plots (C) using infrared lamps from May, 2013. The three precipitation manipulation consisted of precipitation decrease using transparent panel (-30%; P ), precipitation increase using pump and drip-irrigation (+30%; P~+) and precipitation control (0%; P"). Initially, the air temperature was 2.2°C higher in warmed plots than in control plots and later air temperature was maintained close to the target temperature of 3.0°C. The average soil temperature was 3.1°C higher in warmed plots than in control plots. Also the average soil moisture content after the precipitation manipulation increased by 13.9% in P*W anddecreased by 10.0% in P W compared to P“W, and increased by 23.7% in P"C and decreased by 7.6% in P C compared to P"C. It was confirmed that the open-field experimental warming and precipitation manipulation system was properly designed and operating.