Grain Qualityof Rice Variethy RD 15 When Grown Under Varying Fertility Levels in Saline Soil and Brackish Water Conditions

Abstract

A comparison of fertilized (20) kg N and 25 kg P2O5 per ha.) and non-fertilized treatments on grain quality was made for the recommended rice variety RD 15 and two local varieties, Khao Bang-gradan and Puang-ngern, when grown in brackish water on a saline soil. The experiment was conducted in Rayong Province in 1982.
There was no statistically significant effect of the fertilizer treatment within varieties with respect to chalky grain content, grain dimensions and percentage of head rice. However, among varieties differences were recorded; RD 15 had the highest head rice (50.2%) and Puang-ngern the least (30.3%). The level of chalkiness was in teh order of 2.2 , 1.6 and 1.4 for Khao Bang-gradan, Puang-ngern and RD 15, respectively. Grain of the variety RD 15 was generally consistent with regard to physical characteristics while grain of the two local varieties lacked consistency. The variety Khao Bang-gradan had a high level of red rice contamination (35.2%) with a small level of contamination in Puang-ngern (6.6%); RD 15 was not contaminated. The variety RD 15 was the most suitable for the growing conditions where the study was undertaken.