Drought identification indicators for the critical growth period of mango in Panxi region
Considering water supply and demand situation of mango at different growth stages,the drought identifi-cation indicators of mango at flowering and fruiting stage and fruit expansion stage were determined using meteoro-logical data,phenological data of mango and small samples of mango disaster data in Panxi region by cluster analy-sis 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 flow-ering 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.
国家科技期刊平台
NSTL
万方数据
