The effect of planting season on physical and chemical characteristics of local rice varieties

Abstract

The season is the time interval with the most frequent weather. The rainy season is the time when it rains a lot, while the dry season is the time when it rains a little. Planting season is one of the factors that affect the quality of the grain, which directly determines the quality of rice. This study aims to determine the effect of the growing season on the physical-chemical characteristics of rice. The sample observed was the Bujang Marantau rice (local variety) which was taken from two seasons (dry season and rainy season) in the same location, which is Nagari Singkarak, X Koto Singkarak District, Solok Regency, West Sumatra Province. The physical characteristics examined were head rice, broken rice, and groats. Chemical characteristics analyzed were amylose content determined by the IRRI method (1971). Meanwhile, water content and ash content were analyzed by the gravimetric method. In addition, fat content was determined by the Soxhlet method with Weibull modification. Furthermore, protein content was determined by the Kjeldahl method. The results showed that the growing season did not affect the ash content, fat content, and carbohydrates of the Bujang Marantau rice, but affected the water, protein, and amylose content. Based on the quality requirements (SNI 6128:2015), Bujang Marantau rice is included in the medium quality class 1.