MGG Awanthi1*, SB Navaratne2, BMS Jinendra1 and CM Navaratne1
1Department of Agricultural Engineering, Faculty of Agriculture, Mapalana,
Kamburupitiya 81100, University of Ruhuna, Sri Lanka
2Department of Food Science and Technology, Faculty of Applied Science, University of Jayawardhanapura, Sri Lanka
Abstract
Future rises in global surface temperature threaten for rice dependent nations. Previous research has failed to account for the detrimental impact of high temperatures on milling quality in paddy storing. Therefore, main objectives of this study were to assess the milling quality of paddy stored at different temperatures in line with global warming and to identify adaptation techniques. Experiment was conducted as a split-split plot design with 3 replicates. Main, sub and sub-sub plot factors were variety (AT-362, Kuruluthuda), processing technique (raw, parboiled) and storage temperature (26, 30, 34, 38oC) respectively. Head Rice Yield (HRY), Broken Rice Yield (BRY) and Degree of Milling (DOM) were estimated initially and after 6 months. Result revealed that HRY of paddy decreased by the range of 2.1-3.5% with increase in storage temperature from 26°C to 38°C after 6 months. However, temperature was not significantly influenced on HRY and BRY of stored paddy (P>0.05). The DOM was significantly lower (2.07%) at 38oC than other temperatures. The HRY is significantly higher (P<0.05) in parboiled rice than raw rice in both varieties after 6 month at each temperature level. It can be concluded that milling quality of stored paddy is degrading at high temperatures yielding high amount of broken rice and low head rice. Furthermore, Kuruluthuda variety stored at comparatively high temperatures seems to be more tolerant to breakage during the milling compared with At-362.
Key words: Temperature, Milling Quality, Paddy, Storage, Head rice, Broken rice
Full Text :
pdf
(685 kb)
* - Corresponding Author
|
