黑龙江省西部作物生长季降水变化规律的小波分析

Wavelet Analysis on Variation Law of Precipitation in Crop Growing Season in Western Region of Heilongjiang Province

近年来,由于受到全球气候变化的影响,黑龙江省西部半干旱区旱情越来越严重,严重影响农业生产。因此,黑龙江省西部农业生产的稳定发展面临巨大的挑战。为解决上述问题,以甘南县为例,应用小波理论对该县实测作物生长季降水时间序列的多时间尺度变化特征及突变特征进行分析,揭示该区作物生长季降水变化的主要周期及旱涝变化趋势,为甘南县乃至黑龙江省西部农业生产充分利用天然降水和挖掘作物水分生产潜力提供科学依据。

Because of the affect of global climate change,the drought is more and more serious for agricultural production in Semi-arid area of the western region of Heilongjiang Province.Steady progression of agricultural production is confronted with huge challenge in this area.In order to solve above-mentioned problems,taking Gannan County for example,the multi-time scales variation characteristics and jump characteristics of actual growing season precipitation time variation in Gannan County were analyzed using the wavelet theory,and the main periods of growing season precipitation variation and variation trend of drought-flood in this area were revealed.The study could provide scientific gist for fully utilizing natural precipitation and exploiting maize water potential productivity in Gannan County and even the entire area of the western region of Heilongjiang Province.