ผลของการใช้อุณหภูมิสูงในการอบลดความชื้นต่ออายุการเก็บรักษาของเมล็ดพันธุ์ข้าว

Abstract

Seed drying is one of the most important processes of seed production in rice. The purpose for reduce seed moisture without any effects on seed quality. The continuous-flow drier need higher temperature than bacth drier for increased drying rate was used in this experiment. In2008 at Pichit province, Five Experiments were conducted on 12 tons continuous-flow driers to find out the effected of temperature on quality of PSL2 and RD29 rice seed under different levels of temperature including 45, 50, 55 45 followed by 50 and 50 followed by 55°c compared with sun drying method. In2009 at Suphan Buri province, PSL2 rice seeds were used on 30 tons ontinuous-flow driers to study in two experiments. First experiment 3 levels of temperature including 45, 50, 55°c compared with sun drying and another 45 followed by 50 and 50 follow by 55°c compared with sun drying. The suitable temperature for seed drying was 50 followed by 55°c without affected to seed dormancy, storability and vigor. In 2010, RD41 rice seeds were studied at Suphan Buri province. Four methods were conducted drier and followed by sun drying, drier at 45°c (>20% moisture content) followed by 50°c (16-20% moisture content) followed by 55°c (<16% moisture content), sun drying followed by drier and sun drying. The results indicated that the moisture reducing by appropriated temperature of drier was better than another on seed storability and vigor, but rate of moisture reducing got more times. During the rainy season when sun drying area wasn’t enough, Sun drying followed by drier was the best method for seed drying.