PRODUCTION OF PB 260 RUBBER CLONE IN RELATION WITH FIELD WATER BALANCE
In general, rubber production is influenced by fluctuation of monthly rainfall rate. This research was aimed to determine the effect of rainfall, evapotranspiration and soil water content on the production of PB260 rubber clone. This research was conducted at Sembawa Research Centre Experimental Field, South Sumatra from year 2011 to year 2016. The observed rubber tree was mature PB 260 clone planted on clay loam soil. Rubber productions on dry and rainy season from2011 to 2016 were compared to determine the effect of rainfall, soil water content, and evapotranspiration on rubber production. Data were analyzed using SAS v.9 to determine the correlation value of each climatological parameters to rubber production from 2011 to 2016. The results showed that soil water content has the closest relationship with rubber production compared to the rainfall parameter. Latex yield was decreasing as the decrease of soil water content at dry season. Limited water on dry season was become a constraint of the optimum rubber yield.
Keywords: PB 260 clone, Rubber production, water balance, rainfall, hevea, soil water content, evapotranspiration, latex, dry season