Method for determining after-ripening period of high-quality late indica rice

Abstract

The invention discloses a method for determining the after-ripening period of high-quality late indica rice. The method comprises the following steps: before the newly harvested high-quality late indica rice is stored, the electric conductivity and the fatty acid value of the high-quality late indica rice are measured, and the initial electric conductivity and the initial fatty acid value are obtained; during storing of the high-quality late indica rice, the electric conductivity and the fatty acid value of the high-quality late indica rice are measured, and the current electric conductivity and the current fatty acid value are obtained; the difference value delta A of the initial electric conductivity and the current electric conductivity and the difference value delta B of the initial fatty acid value and the current fatty acid value are calculated; and when delta A is larger than the electric conductivity preset threshold value and delta B is larger than the fatty acid value presetthreshold value, the experienced number of storage days of the high-quality late indica rice is recorded as the after-ripening period of the high-quality late indica rice. The after-ripening period ofthe high-quality late indica rice is determined by synthesizing change of the two indexes of the electric conductivity and the fatty acid value, the after-ripening process of the high-quality late indica rice can be more accurately evaluated, and accuracy of determining the after-ripening period of the high-quality late indica rice is improved.

Description

technical field [0001] The invention relates to the technical field of grain storage, in particular to a method for determining the post-ripening period of high-quality late indica rice. Background technique [0002] Late indica rice refers to ordinary indica rice, which is generally considered to have a short post-maturation period, even 0 days, while high-quality late indica rice refers to the production of high-quality varieties (mostly hybrid rice), and the quality indicators meet the requirements of GB / T17891 Indica rice, long-term research has found that high-quality late indica rice is harvested and stored in the warehouse after reaching morphological maturity in the field, but the grains have not reached physiological maturity, which is manifested by low seed germination rate, strong respiration, and low rice yield , poor storage resistance, and after storage for a period of time, rice grains continue to complete internal physiological changes, and gradually reach fu...

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Problems solved by technology

[0003] However, due to the low germination rate of grains during the post-ripening period, and the low germination rate of aged and deteriorated grains, in the process of purchasing and storing high-quality late indica rice, fresh seeds in the post-ripening period cannot be distinguished only by the germination rate. and aged and deteriorated seeds, the quality of the seeds cannot be accurately evaluated; moreover, due to the physical, chemical and physiological changes of high-quality late indica rice during the post-ripening process, the germination rate alone cannot represent the whole seed quality. In addition, there are also the problems of complicated germination rate measurement process and long test period, and accurate germination results cannot be obtained in a short time, which affects the accuracy of post-ripening period determination.

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