ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 15 Issue 12 > 1989,15(12):13-16. DOI:10.7519/j.issn.1000-0526.1989.12.003 Prev Next
A study on periodicity for freezing injury of citrus in the middle and lower reaches of the Changjiang River
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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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