Dynamics of Sugar Content and Sink-source Change of Sugar Beet

doi:10.11924/j.issn.1000-6850.casb18070082

Abstract

Abstract: To study the mechanism of sugar content response to sink-source alteration, the effects of leaf area index (LAI ), dry mater of aerial part (DMA ) and dry mater of hypogeal part (DMH ) on sugar content changes in sugar beet were investigated.‘KWS6167’was used as material, four different transplanting periods were set up, and five time points were sampled. LAI , DMA , DMH and sugar content were determined. The results showed that two indicators of the sink (DMH and the sugar content of roots) presented a linear upward trend in the whole growth period. In the four growth periods, the growth rate ofDMH showed“N”type, while the growth rate of sugar content showed an inverted“N”type. In A, B and C treatments,LAI andDMA showed a positive correlation with sugar content from June 10th to August 10th, while a negative correlation from August 10th to October 7th. In D treatment from June 10th to October 7th,DMA andDMH showed a positive correlation with sugar content. The sugar content of beet roots has significantly positive correlation withDMH and the sinksource ratio.

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