关键词: 寒露风, 寒露风, 变化趋势, Mann-Kendall突变检验, 小波分析

Abstract: [Objective]The aim is to evaluate the qualities of Beta vulgaris (sugar beet) germplasms more authentically, so that the excellent quality traits of sugar beet germplasms can be further mined and applied pertinently. [Method] Three comprehensive indexes of sugar beet, sucrose recovery rate, indexes of impure components, sucrose recovery amount, were referenced in this study, so that the impact of impure and harmful components in the root tuber, the component of Potassium、Sodium and α-N, could be eliminated. The quality traits of 162 germplasm accessions of sugar beet germplasms were investigated for two years. [Result] According to the data of quality traits of the 162 germplasms, the content of harmful, non-sucrose impure components in sugar beet root, including Potassium、Sodium and α-N, which interfere sucrose extraction and recovery, diverged significantly among different germplasm accessions. The index of Sodium content diverged the most greatly among the tested accessions, with a range (R) up to 4.763 mmol/100g, which was 1.84 times compared to the average sodium content, and the coefficient of variation (CV) reached 34.43%. Indexes of α-N content and Potassium content also exhibited significant difference among the tested accessions, with the CV of 16.90% and 19.03% respectively. Via evaluation data, two groups of sugar beet accessions were selected. One group were made up of 10 accesions which had higher sucrose content and lower harmful components, and was named as a "high sucrose group", with an average sucrose recovery rate of 15.88% within the group. The other group were made up of 48 accesions which had considerable sucrose content and lower harmful components, and was named as a "moderate-high sucrose group", with an average sucrose recovery rate of 14.95% within the group. Meanwhile, 8 accessions of high yield type were elected with an impurity index of no more than 4.0 and a root yield no less than 45.00t/hm², and 13 accessions of moderate high yield type were elected with an impurity index between 4.0-4.5 and a root yield no less than 45.00t/hm². [Conclusion] The sucrose recovery amount index of sugar beet root in this study is a comprehensive index, combining both the sucrose recovery rate index and the productivity of root index, and is a promising index to evaluate quality of sugar beet germplasms in order to find out high yield, high quality accessions. The sucrose recovery amount index can be applied in sugar beet germplasm evaluation, and help to select varieties with both high yield and high process qualities. Its application can give consideration to both the benefit of sugar beet farmers and the profit of sugar manufactured enterprises, so that can facilitate the sustainable development of beet sugar manufacture industry.