Increase in Air Temperature in The Region of South Sumatra Province as the Indicator of Global Warming and the Effect on Transpiration of Lansium domesticum Corr.

Global warming is one of biggest problems faced in the 21 century. One of the impacts of global warming is that it can affect the transpiration rate of plants that occur. This study purpose to see how much increase in air temperature that occurred in the region of South Sumatra Province and to know the effect of increase in ari temperature in the region of South Sumatra Province on transpiration rate of Lansium domesticum Corr. This study used a complete randomized design with 9 treatments (22.9 C, 23.6 C, 24.6 C, 26.3 C, 27 C, 27.8 C, 31.7 C, 32.5 C, and 32.9 C) and 3 replications. Air temperature data as secondary data obtained from the Meteorology, Climatology and Geophysics Agency (MCGA) Palembang Climatology Station in South Sumatra Province. The measurement of transpiration rate is done by modified potometer method with additional glass box. The data obtained are presented in the form of tables and graphs. Transpiration rate (mm/ g plant/ hour) at temperture 22.9 C = 4.37, 23.6 C = 7.03, 24.6 C = 8.03, 26.3 C = 10.11, 27 C = 13.13, 27.8 C = 17.87, 31.7 C = 23.21, 32.5 C= 25.45 and 32.9 C= 27.24. At the minimum air temperature in the region of South Sumatra Province there is increase in air temperature of 1.5 C, average daily air temperature increase 1.3 C and maximum air temperature increase 1.2 C.