| Temporal and spatial distribution and comprehensive defense technology of freezing injury during apple bloom period in Southern Shanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2020.05.29 |
| Key Words: freezing injury flowering stage of apple comprehensive defense temporal and spatial distribution M-K test Southern Shanxi |
| Author Name | Affiliation | | YUAN Jiawei | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | ZHANG Jian | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | WANG Lu | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | ZHANG Pengfei | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | LIANG Zhejun | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | TIAN Shimin | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | XUE qinqin | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | WANG Ailing | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | ZHANG Zhanbei | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | DUAN Guoqi | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | YANG Yinbin | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China | | WANG Yuxiang | Cotton Research Institute, Shanxi Academy of Agricultural Sciences, Yuncheng, Shanxi 044000, China |
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| Abstract: |
| Using minimum daily temperature and average daily temperature observation data at apple flowering stage in Southern Shanxi during 1997-2016, according to apple cold hierarchy index in flowering period, using the least square method to linear tendency estimate, low temperature cold days and Mann-Kendall nonparametric test method for low temperature cold days in significance test, we analyzed the developing trend and the temporal and spatial distribution characteristics of freezing injury of apple flowering stage in Southern Shanxi. The results showed that the average annual number of low\|temperature freezing days in the Southern Shanxi Province was 3.1 d, and the average temperature in flowering period in all counties was between 13.0℃ and 13.8℃. In mid\|early April, the Yuncheng area was prone to freezing damage, and in late April, Jixian and Xixian in Linfen were prone to freezing damage. The number of freezing days in flowering period of apple in Southern Shanxi showed a decreasing trend, while the extreme minimum temperature in flowering period showed a rising trend, which was negatively correlated with the number of freezing days. In the Southern part of Shanxi Province, the abrupt change point of the number of freezing days during flowering period was in 2008, and the decreasing trend was more significant after 2015. For the comprehensive defense measures of apple’s low temperature damage, we can adopt a strategy of “prevention first, combination of resistance and compensation”. |
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