关键词: 芒果, 水分盈亏指数, 干旱指数, 指标判识

Abstract: Considering water supply and demand situation of mango at different growth stages, the drought identification indicators of mango at flowering and fruiting stage and fruit expansion stage were determined using meteorological data, phenological data of mango and small samples of mango disaster data in Panxi region by cluster analysis and sample distance analysis. The validity of drought identification indicators was verified by T_test, reserved history sample test, typical station, and identification of typical years. The drought-triggering threshold at the flowering and fruiting stage and fruit expansion stage were 0.89 and 0.80, respectively. The drought indices extracted based on the drought identification indicators at critical growth stages were consistent with that in historical disaster samples. The identification accuracy of the identification indicators for the reserved historical samples was 81.5%, and the identification accuracy of the indicators for long time-series disaster samples of a typical station was 95%. The drought identification indicators can be used to drought disaster identification in typical years, and the accuracy of the indicator identification in drought areas in typical years was 85.7%. The results can provide technical support for drought monitoring and drought prevention and mitigation of mango in Panxi region.

Key words: mango, water budget index, drought index, index identification