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我国柑桔种植的北缘地区(主要包括湖北、陕西、江苏、安徽、上海及湖南、江西、浙江的北部等省、市)处北亚热带气候,经常遭受程度不同的周期性冻害,轻者减产,重时成片毁园(1977年冻害使本区柑桔总株数的72.3%受冻)。因此,本地区冬季的低温冻害是影响柑桔发展的主要生态因子。 关于柑桔的低温冻害指标,过去国内研究少有报道,大多引用国外试验资料,且主要是生理指标,与生产实践有一定差异。为了进一步定量地摸清低温对柑桔冻害的影响,
The northern subtropical climate in the northern margin of China’s citrus cultivation (mainly including Hubei, Shaanxi, Jiangsu, Anhui, Shanghai, Hunan, Jiangxi and northern Zhejiang provinces and cities) often suffers from periodic frost damage at different degrees, , When the weight of a piece of destruction of the park (1977 freeze damage to the region of the total number of citrus 72.3% of the cold). Therefore, the frost damage in winter in this region is the main ecological factor that affects the development of citrus. On citrus low-temperature freezing damage indicators, the past few reports of domestic research, most of the foreign test data, and mainly the physiological indicators, and production practices are some differences. In order to further quantitatively ascertain the impact of low temperature on citrus frost damage,