Comparative Study of Fertilizer Rertilizer Requirement for Three Sugarcane Cultivars Grown on Sandy Loam Soil in Sra Kaew Province

Abstract

The field trial was conducted in the Korat soil series (fine-loamy, siliceous isohyperthermic, Oxic Paleustults) during 1999-2000. The experimental design was Split plot in RCB with 3 replications. The treatments kcomprised 3 varieties of sugarcane (U-tong 3, K88-93 and K88-58) as main plot and 4 rates of chemical fertilizer (0-0-0, 12-6-12, 18-12-18 and 24-12-24 of kg N-P2O5 -K2O/rai) as subbplots.
The results indicated that sugarcane cv. U-tone 3 produced the highest yield, whereas sugarcane cv. K88-58 gave the lowest yield. However, both U-tong 3 and K88-58 produce % CCS, BRIX and % POL higher than that of K88-93. For the chemical fertilizer rates, it was evident that the yield of the plants supplied with various rates of fertilizer was not significantly different. Also, with increasing concentrations of fertilizer a decreased in the % CCS was observed. In particaular at the level of 24-12-24 of kg N-P2O5 -K2O/rai the plants produced the lowest of CCS.