黑龙江省主要农作物生育期降水的分形特征与生态学意义

应用分形理论研究了黑龙江省各县市1984-1999年主要作物生育期(4-9月)降水的变化特点。结果表明:主要作物生育期降水存在较好的自相似关系,具有显著的分形特征;各县市分维结果反映,黑龙江省主要作物生育期降水分维从西南到东北增加,北部分维最高,分维越高说明降水变化越复杂、越不稳定。

Fractal Characteristics of Precipitation During Growing Periods of Main Crops and Its Ecological Significance in Heilongjiang Province

The characteristics of precipitation changes during growing periods of main crops in 79 counties and cities of Heilongjiang Province from 1984 to 1999 was studied by using the fractal theory.Results showed that the distribution of the precipitation had a good statistical self-similarity as well as a significant fractal character.The analysis for the different counties and cities showed the fractal dimension of precipitation with an increasing trend from the Southwest to the Northeast of the Province.In the North was with the highest fractal dimension of precipitation,which indicated a complicated changes and low stability of the precipitation.