Study on Comprehensive Evaluation Method of Rice Quality in Anhui Province
In order to quantitatively evaluate the comprehensive characteristics of rice quality,the head yield,chalkiness,transparency,alkali spreading value,gel consistency,and amylose content were utilized as the indicators for rice quality evaluation,according to the industry standards of cooking rice variety quality,based on the quality data gathered from regional trials for mid-season indica rice and mid-season japonica rice in Anhui province from 2008 to 2021.The methods of classification assignment and linear weighted summation as well as computer numerical simulations were employed to clarify weight coefficients for each evaluation index of rice quality and construst the rice quality index(IRQ)for mid-season indica rice(IRQ1)and mid-season japonica rice(IRQ2),and eventually determined the comprehensive rice quality evaluation method for mid-season indica rice and mid-season japonica rice.The results showed that the weight coefficients of the quality evaluation index for mid-season indica rice were 0.20 for head yield,0.26 for chalkiness,0.06 for transparency,0.22 for alkali spreading value,0.10 for gel consistency,and 0.16 for amylose content.In contrast,the weight coefficients mid-season japonica rice were 0.23,0.28,0.10,0.08,0.15,0.16,respectively,among which chalkiness was the main factor affecting the quality of mid-season rice.For mid-season indica rice,the thresholds for rice quality index corresponded to the first,second,and third-grade high-quality rice as well as ordinary rice were:IRQ1≥3.94,3.94>IRQ1≥3.47,3.47>IRQ1≥3.17 and IRQ1<3.17.Whereas for mid-season japonica rice the thresholds for the quality index corresponded to the first,second,and third-grade high-quality rice as well as ordinary rice were:IRQ2≥3.82,3.82>IRQ2≥3.33,3.33>IRQ2≥3.04 and IRQ2<3.04.After conducting a thorough verification,this comprehensive evaluation method for mid-season Indica and Japonica rice quality yielded an average accuracy of 81.4%and 80.0%for multi variety sample testing in Anhui province.Furthermore,accuracy were 85.7%and 92.9%for a single variety of rice.For multi-variety sample testing in other provinces,accuracy rates consistently exceeded 80%which proved that this method could be used for quantitative evaluation of the comprehensive quality of mid-season indica and japonica rice in diferent areas.
国家科技期刊平台
NSTL
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