Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (22): 96-105.doi: 10.11924/j.issn.1000-6850.casb19030091

Special Issue: 农业气象 农业生态

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Drought Risk Zone of Sugarcane in Liuzhou Based on Crop Water Deficit Index

  

  • Received:2019-03-21 Revised:2019-05-28 Accepted:2019-06-11 Online:2019-08-13 Published:2019-08-13

Abstract: 【Objective】 The objective of this study was to make a drought risk zone map of sugarcane in Liuzhou, and to provide scientific reference for the prevention and avoidance of sugarcane drought and the optimization of planting layout. 【Method】 Using the meteorological data of 8 meteorological stations in Liuzhou from 1961 to 2014 and combining with the development period of sugarcane, and on the basis of water deficit index theory, the drought risk index of sugarcane in Liuzhou was constructed by taking the water deficit index with its probability and weight coefficient of each growth stage as the evaluation index. Finally, the risk zone map was made. 【Result】 Water deficit index and drought frequency are much higher in elongation and maturity period. The east of Liuzhou City, the south of Luzhai County and the central part of Liucheng County are in high-risk zone. The southwest of Sanjiang County and most areas of Rongan County are in medium-risk zone. Most areas of Rongshui County and the small areas of west of Rongan County are in low-risk zone. 【Conclusion】 The spatial difference of drought risk is high in Liuzhou. The results of the regionalization can provide scientific reference for rational arrangement of planting layout and formulation of scientific irrigation water allocation plan.