Characteristics of meteorological drought and its impact on agriculture production in Changji prefecture

doi:10.14088/j.cnki.issn0439-8114.2021.14.011

Abstract

Abstract: Based on the precipitation and drought data of 1961—2020 from 10 meteorological stations in Changji prefecture, the spatial and temporal variation characteristics of precipitation in Changji prefecture were analyzed, and the monthly, seasonal and annual precipitation anomaly percentage of each meteorological station was calculated. The drought events were selected according to the drought index of precipitation anomaly percentage, and the spatial and temporal distribution of meteorological drought at different time scales was analyzed in detail. The actual situation of historical drought and the evaluation results of precipitation anomaly percentage index were evaluated for practicability. The change trend of crop disaster area year by year was analyzed, and the influence of meteorological drought on agricultural production was studied. The results showed that the precipitation in Changji prefecture increased in recent 60 years, and the annual distribution was uneven, with the maximum precipitation in summer and the minimum precipitation in winter. It can be seen from the chronology that the precipitation was relatively small and unstable before the 1980s, and it began to increase year by year in the early 1980s. In 1983, there was a sudden increase, and the increase was obvious in 1998, and the increase was gentle since the 21st century. The frequency of meteorological drought in the past 60 years is more in central China than in western and eastern China. The monthly frequency of meteorological drought fluctuated, the most in January, the second in July, and the least in November. The main meteorological drought is autumn drought, winter drought is the second, mainly light drought. The annual frequency of meteorological drought events decreased gradually. Under the influence of meteorological drought in the past 60 years, the crop disaster area in Fukang city, Jimusar, Qitai and Mulei county was larger and the disaster degree was serious, followed by Caijiahu and Changji city, and Manas and Hutubi county were smaller and the disaster degree was light. The crop disaster area caused by meteorological drought disaster showed a decreasing trend. The drought years evaluated by the percentage of precipitation anomaly were 21 years in agreement with the historical drought years, and the coincidence rate was 80%.

Key words: precipitation, anomaly percentage of precipitation, meteorological drought, agricultural production, contrastive analysis

CLC Number:

P467

HOYHAZI Erkejan, RUZI Apar, ZHOU Guo-hong, HUANG Jian. Characteristics of meteorological drought and its impact on agriculture production in Changji prefecture[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(14): 64-70.

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