Page 7 -

โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

The factors influencing the rice storage decision model indicated that independent
variables may explain 44% of the decision making that farmers make related to rice storage.
Variables that influenced the decisions related to Jasmine rice storage in the same direction with
statistical significance include the majority of laborers were females, household income, region
(upper-northeastern, central-northeastern, and lower-northeastern), rice production pattern,
quantity of Jasmine rice yield, barn owning, and participation in the Barn Pledging Project.

For the Barn Pledging Project, the number of participating farmers who failed to meet
the goal set by BAAC for rice production under this project was small compared to the total rice
yield in the market. The results revealed that most farmers who stored rice used to participate in
the Barn Pledging Project. The farmers in rainfed areas who grew conventional rice participated in
this project at the highest level. Farmers who participated in this project owned large farms, with
a Jasmine rice production area >30 rai. An analysis of the factors influencing the decision to
participate in the Barn Pledging Project revealed that independent variables were able to explain
49.09% of this decision. The cost of rice drying, barn owning, lower-northeastern region, the
number of household laborers, farm size, and production pattern all influenced the decision to
participate in this project in the same direction, with statistical significance.
Survey research on the quality of Jasmine rice revealed that organic Jasmine rice grown
in rainfed areas was the highest quality. This rice had the highest level of head rice percentage
and 2-acetyl-1-pyrroline (2AP) with the lowest level of broken rice percentage. These results are
consistent with the results obtained from other experimental research. The rice quality from
larger farms was lower than that of small farms. In addition, the moisture content in Jasmine rice
grains did not vary based on environmental or production patterns. After storing Jasmine rice in
the barn, 2AP of rice based on environmental and production conditions did not vary. Based on
the physical condition of barns, it was found that the frequency of use of barns had no effect on
rice quality, whereas changing the moisture content and 2AP demonstrated differences due to
leakage and the sunlight protection. Moreover, Jasmine rice quality did not vary based on the
height of barns, but materials located under barns and the floor leveling upwards of barns may
have caused differences in the moisture content of Jasmine rice. Jasmine rice in barns that were
located over soil tended to have a lower level of moisture content after storage compared to
the barns located over cement or stone or to other storage areas that lacked floor leveled
upwards. In addition, a barn’s flooring tended to lower the moisture content of Jasmine rice. The
results revealed that there were 2 factors influencing the chalky percentage: leakage of barns and
whether rice was stored in sugar sacks, both of which increased with an increase in the number
of chalky grains. For instance, barns with a higher level of leakage had a greater probability of
having a higher chalky rice percentage, whereas rice storage in sugar sacks had a greater
probability of having a higher level of chalky rice percentage than that of rice stored in piles. It
was also found that other factors had no statistically significant relationship to the chalky rice
percentage.
It was found that the quality of Jasmine rice on the head rice percentage and fragrance
(2AP: 2-acetyl-1-pyrroline) decreased according to the duration of rice storage. Jasmine rice had
the highest 2AP in the first month and then decreased rapidly in the third month. Conversely,
organic Jasmine rice had a higher level of quality in terms of head rice percentage and more 2AP
than those of conventional Jasmine rice. In addition, storing rice in barns produced a low broken
rice percentage and the highest level of 2AP. Storing rice in a galvanized barn produced the
highest level of temperature and humidity in the piles, and the lowest level of moisture content

จ