Pengelolaan Lahan Gambut di Perkebunan Kelapa Sawit di Kebun Teluk Bakau, PT Bhumireksa Nusa Sejati, Minamas Plantation, Riau

Abstract

Internship was conducted at the Teluk Bakau Estate, PT Bhumireksa Nusa Sejati (BNS), Riau in order to follow the practise of the company in managing peatland for oil palm crop, as well as to study the water management system of estates. Activity was carried out for 4 months from February to June 2013. Target of water level at PT BNS plantation commonly is in range 25 to 50 cm below the ground surface. Drainage system in PT BNS consists of main canals, branch canals, new branch canals, collection canals, collection trenches, middle trenches, and field drain. The efforts to maintaining the water level are building up water zoning, installing piezzometers, water gates, over flow gates, water flows, building up emergency gates, installing spillway, treating canals, and making maps and standard operational procedure of water management system. Simple linear regression analysis was used to estimate the effect of rainfall to water level. Result showed that the rainfall significantly (p value = 0.014) affected the water level. Increasing 1% of the rainfall would increase the water level by 0.06899% below the ground surface. Multiple linear regression analysis was used to estimated the effect of rainfall and water level to production. Results showed that the rainfall and the water level did not affect the production. Most of the water levels at Teluk Bakau Estate are controlled well. Most of the drainage system conditions are good and can be passed by conveyance of water. Water management system is managed well.