87. Rice as a Food 4
- INDEX -
CULTIVATION CONDITIONS AND RICE QUALITY
Nutritional Condition of Rice Plant, Weather, and Ripening
Nitrogen Application and Protein in Rice Grain
Temperature at Ripening and Amylose
Disease and Insect Control and Damaged Grain
*Cracked Rice
CULTIVATION CONDITIONS AND RICE QUALITY
Nutritional Condition of Rice Plant, Weather, and Ripening
Quality of the rice grain is basically affected by ripening. In order to reduce immature grains and improve the percentage of perfect kernels, the following conditions should be present:
i. Not lodged.
ii. Nutritional conditions, especially that of nitrogen, are good after heading.
iii. Climate after heading is good, and there is enough duration of strong sunshine for managing sufficient photosynthesis.
iv. The number of spikelet per square meter is suitable for the size of the rice plant
(too many spikelet result in an increase in immature grains.)
Practical measures to improve ripening differ among varieties of concern. It is necessary to take measures from the stages of setting planting density suitable for the selected variety and fertilizing condition, to confirm the number of spikelet per square meter. Namely, maintenance of the nutritional condition to enhance photosynthesis after heading, with appropriate nitrogen application, decreases immature grains and increases the percentage of perfect kernels.