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中文摘要: 本文选择≤-90℃的负积温和极端最低温度≤-8℃,作为长江中下游地区柑桔越冬期间冻害指标,利用功率谱、方差分析、谐波分析三种方法,对长江中下游地区柑桔冻害周期进行研究。结果表明,功率谱计算结果与生产实际相吻合,方差分析可反映冻害周期趋势,谐波分析不宜单独进行柑桔冻害研究。长江中下游地区柑桔冻害存在准16年周期。
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Abstract:In this paper,that negative accumulated temperature lower than or equal to-90℃ and extremly minimum temperature lower than or equal to-8℃ are taken as the freezing injury index to citrus of hibernation in the middle and lower reaches of the Changjiang River. The periodicity of freezing injury of citrus is analysed by use of power spectral method, analysis of variance and harmonic analysis in this area.The simulating results achieved from the power spectral method are similar to the practice in production. The tendency in periodicity for freezing injury of citrus could be shown by variance analysis.While the periodicity for freezing injury of citrus is not able to be obtained using the harmonic analysis alone.The quasi-ten-year periodicities for freezing injury of citrus dominate over this area.
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引用文本：
霍治国,张养才,1989.长江中下游地区柑桔冻害周期研究[J].气象,15(12):13-16.
,1989.A study on periodicity for freezing injury of citrus in the middle and lower reaches of the Changjiang River[J].Meteor Mon,15(12):13-16.
霍治国,张养才,1989.长江中下游地区柑桔冻害周期研究[J].气象,15(12):13-16.
,1989.A study on periodicity for freezing injury of citrus in the middle and lower reaches of the Changjiang River[J].Meteor Mon,15(12):13-16.