Effect of Organic Fertilizer from Central Waste Water Treatment of Saha Group Industrial Park on Growth and Increasing Biomass of Kra Thin Saba (Acacia mangium Willd.)

Abstract

This study investigated the effect of organic fertilizer from Central Waste Water Treatment of Saha Group Industrial Park on growth and increasing biomass of Kra Thin Saba (Acacia mangium Willd.) planted in Kamphaeng Saen series. The experimental design was arranged in Randomized Complete Block (RCBD) with 3 replications and consisted of 10 treatments. The results showed that the application of OFB of 500 kg/rai in combination with chemical fertilizers containing all major elements equivalent to 500 kg/rai of the OFB provided the highest of plant height which was not significantly difference from the application of OFB of 1,000 kg/rai, the application of OFD of 500 kg/rai in combination with chemical fertilizers containing all major elements equivalent to 500 kg/rai of the OFD and the application of OFD of 1,000 kg/rai. The application of OFB of 500 kg/rai in combination with chemical fertilizers containing all major elements equivalent to 500 kg/rai of the OFB provided the highest of plant diameters and leaf greenness which was not significantly difference from the application of OFB of 1,000 kg/rai. Furthermore, the application of OFB of 500 kg/rai in combination with chemical fertilizers containing all major elements equivalent to 500 kg/rai of the OFB provided the highest of total fresh biomass (11.09 ton/rai) which was not significantly difference from the application of OFB of 1,000 kg/rai and the application of OFD of 500 kg/rai in combination with chemical fertilizers containing all major elements equivalent to 500 kg/rai of the OFD. While, the application of OFB of 500 kg/rai in combination with chemical fertilizers containing all major elements equivalent to 500 kg/rai of the OFB provided the highest of total dry biomass (4.48 ton/rai) which was not significantly difference from the application of OFB of 1,000 kg/rai.