盘锦地区不同品种水稻品质及其冠层高光谱反射率特征分析

Analysis of rice quality of different varieties and characteristics of canopy hyperspectral reflectivity in Panjin area

对2022年盘锦地区8种水稻进行品质特征分析,并探讨不同品种水稻籽粒加工品质、外观品质、蒸煮品质、营养品质与水稻成熟期冠层原始光谱、一阶导数光谱及连续统去除光谱的相关关系。结果表明:盐粳939的加工品质较好,锦稻106(9系)的外观品质较好,锦稻香103的蒸煮品质较好,盘粳968(3系)的营养品质较好。原始光谱反射率与糙米率指标的相关关系较好,在731~1131 nm和1150~1360 nm两个波段内,相关系数高达0.767;糙米率与一阶导数光谱的相关关系最好,在1459 nm处达到极显著相关,相关系数为0.867;垩白度和垩白粒率均在1804 nm处与连续统去除光谱的相关关系较好,并达到极显著负相关,相关系数分别为-0.979和-0.983;长宽比与原始光谱的相关关系较好,相关系数在659 nm处达到最大值,为0.849;蒸煮品质所包含的食味值、直链淀粉含量和营养品质所包含的蛋白质含量均与连续统去除光谱有较好的相关关系。

The quality characteristics of 8 varieties of rice in Panjin area in 2022 were analyzed.The correlation between processing quality,appearance quality,cooking and taste quality,nutritional quality of rice grains and original spectral reflectance,first derivative spectrum,continuum removed spectrum of the rice canopy at maturity were also examined.The results show that Yanjing 939 has better processing quality;Jindao 106(Line 9)has better appearance quality;Jindaoxiang 103 has better cooking quality;Panjing 968(Line 3)has better nutritional quality.The correlation between raw spectral reflectance and brown rice rate is good with correlation coefficients reaching at 0.767 in the wavelength bands of 731~1131 nm and 1150~1360 nm.The correlation between brown rice rate and the first derivative spectrum is best reaching a highly significant level at 1459 nm with a correlation coefficient of 0.867.The correlations between chalkiness degree,chalky grain rate and continuum-removed reflectance are better at 1804 nm,reaching a significant negative correlation with correlation coefficients of-0.979 and-0.983,respectively.The correlation between length-width ratio and the original spectrum is good with the highest correlation coefficient of 0.849 at 659 nm.The taste value contained in cooking quality,the amylose content,and the protein content included in nutritional quality all show good correlation with continuum removed spectrum.