安徽农业科学2011，Vol.39Issue(12)：7516-7517,7548,3.
大连市作物生长季降水变化及农业旱涝程度分析
Precipitation Variation during the Crop Growing Season and Trend Analysis of Agricultural Drought and Flood in Dalian City in Recent 60 Years
赵冬艳1
作者信息
- 1. 辽宁省大连市气象局,辽宁大连116001
- 折叠
摘要
Abstract
[ Objective ] The aim was to study the precipitation changes and agricultural flood and drought degree of crops in Dalian City in recent 60 years. [ Method] The monthly precipitation and average temperature data from April to October during 1951 -2010 in Dalian observation station were selected. By dint of linear regression, climate tendency rate and humidity index, the growth changes and agricultural flood and drought degree of crops in recent 60 years in Dalian City were expounded from the aspects of natural precipitation tendency changes and agricultural water satisfaction degree of crops in growth period. [ Result] In recent 60 years, the precipitation of crops during growth period in Dalian City had decreasing tendency. The inclination rate was - 15.888 m/10a. Precipitation decreased 95.3 mm in recent 60 years; precipitation increased a little in spring and decreased a lot in summer, then decreased in autumn. The monthly precipitation in each month distributed unevenly. Precipitation in July and August increased, taking account of 53.8％ of the total precipitation during the growth period of crope. The K value of humidity index during the growth period of crops in Dalian in recent 60 years was 0.90 in general. It was light drought climate.The humidity index was decreasing. Climate developed toward drought direction; the drought occurrence frequency was 59％. It was mild drought climate in spring and autumn. The climate was generally wet in summer. Seen from the yearly means, besides of July and August, it reached mild drought degree in other months. [ Conclusion] The study provided reference for the regional agricultural production, agricultural structure adjustment and drought and flood disaster prevention.关键词
作物生长季/降水/农业/旱涝程度/大连市Key words
Crop growing season/ Precipitation/ Agriculture/ Dryness/ Dalian分类
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赵冬艳..大连市作物生长季降水变化及农业旱涝程度分析[J].安徽农业科学,2011,39(12):7516-7517,7548,3.
