A Research on the Changes of Nutrients of High Oil Corn during Storage in Taiwan

• Main Authors: Clover Chang, 張學義
• Other Authors: Prof. Chanrg-Yih Cheng, Ph.D.
• Format: Others
• Language: en_US
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/69029530175575680539

碩士 === 國立屏東科技大學 === 畜產系 === 90 === Abstract The objectives of this research were to investigate the changes of nutrients of the imported High Oil Corn (HOC) during storage. Samples of the imported HOC and commodity corn (or normal corn, regular corn, conventional corn, yellow corn, typical corn, etc.) were collected at the feed mill right after their unloadings. Corn samples were allocated into six treatmental storage conditions (temperature 28℃、30℃ and 35℃ with relative humidity 60% and 90%) randomly. Those samples were analyzed after one-month and two-month storage periods for their contents of moisture, crude protein, crude fat, crude fiber, ash, phosphorus, and vitamin A and also gross energy, acid value of oil, and water activity. Data were analyzed by Statistics Analysis System (SAS), General Linear Model (GLM) procedure and Duncan's New Multiple Range Test. The results of this research showed that the average crude fat content of the imported HOC was 6.52% while that of commodity corn was 3.49%，their differences were significant (P<0.05). As for the changes of nutrients of the imported High Oil Corn (HOC) during storage, if the temperature maintained at 20℃, 28℃ and 35℃ with relative humidity at 60% and 90% for one month and two-month periods, the changes of nutrients of imported HOC were not significant (P<0.05). The changes of moisture contents of imported HOC were not significant (P>0.05) under the storage temperature of 20℃ and 35℃. However, the changes were significant (P<0.05) under the temperature of 28℃. The storage periods of one-month and two-month showed same reults. The changes of crude fat contents under the storage temperature of 28℃ and 35℃ with two-month storage periods were significant (P<0.05). The changes of water activity under the storage temperature of 28℃ were significant (P<0.05). The changes of acid values of oil under the storage temperature of 35℃ were significant (P<0.05). The contents of other nutrients were not influenced significantly (P>0.05) by storage temperatures between 20℃ and 35℃. The moisture contents of imported HOC were decreased significantly (P<0.05) under the storage humidity of 60% and increased significantly (P<0.05) under the storage humidity of 90%. The decreases of crude fat contents were significant (P<0.05) under the storage humidity of 90%. The decreases of water activity were significant (P<0.05) under the storage humidity of 60% and the increases were significant (P<0.05) under the storage humidity of 90%. The contents of other nutrients were not influenced significantly (P>0.05) by storage humidities between 60% and 90%. Based on the results of this research, the main effect factors of temperature and himidity have interactions in the contents of moisture, contents of crude fat, water activity, and acid value of oil of corn. The storage periods of one-month and two-month showed same reults. This reasarch is a statical analysis. The dynamic analysis of moisture movement of storaged corn mass under the different ambiemt tremperature during daytime and night time and the moisture movement of corn with different moisture contents under the practical storage condition were not considered in this research. (Key words: High oil corn, storage temperature, storage humidity, storage period, nutrient contents)