本文基于对南阳丹桂开花现象的多年连续观测记录，依次分别统计每年第一批开

Based on the continuous observation records of the flowering phenomenon of Osmanthus osmanthus Nanyang for many years, the daily maximum temperature, daily average temperature, The minimum value of the daily minimum temperature is selected from the maximum value as the low temperature daily index of each temperature expression form, and the natural low temperature process is counted according to the low temperature daily index, and the natural low temperature process with a short interval is combined into a low temperature process and continuous The low-temperature process is analyzed in a unified manner, compared and verified with the initial flowering period and the number of flowering batches of each batch of Osmanthus osmanthus, and the relationship between the initial flowering period of Osmanthus osmanthus Nanyang and the start date of the combined low-temperature process, the number of flowering batches and the negative effective accumulated temperature of the combined low-temperature process are analyzed. relationship, so as to determine the low temperature index before flowering that can be used to predict the flowering period of each batch of Osmanthus fragrans.

This article is based on years of continuous observation records of the flowering phenomenon of Nanyang Dangui, and sequentially calculates the minimum values of daily maximum temperature, daily average temperature, and daily minimum temperature between the first and second batches of flowering and the previous batch of flowering each year. The maximum values are selected as the low-temperature daily indicators for each temperature expression form, and the natural low-temperature process is calculated based on the low-temperature daily indicators, Merge the natural low temperature processes with short and discontinuous intervals into a single low temperature process and a continuous low temperature process for unified analysis, and compare and verify them with the initial flowering period and number of flowering batches of Dangui in different batches. Analyze the relationship between the initial flowering period of Nanyang Dangui and the start date of the combined low temperature process, as well as the relationship between the number of flowering batches and the negative effective accumulated temperature of the combined low temperature process, To determine the pre flowering low temperature indicators that can be used for predicting the flowering period of each batch of Dangui.

Based on the continuous observation records of the flowering phenomenon of Dangui in Nanyang for many years, this paper counts the minimum values of daily maximum temperature, daily average temperature and daily minimum temperature before and after the first batch of flowering and the second batch of flowering and the last batch of flowering, respectively, and selects their maximum values as the daily low temperature index of each temperature expression form, and counts the natural low temperature process according to the daily low temperature index. The discontinuous natural low-temperature process with short interval is combined into a low-temperature process and a continuous low-temperature process for unified analysis, which is compared and verified with the flowering start period and flowering batch number of each batch of osmanthus fragrans, and the relationship between the flowering start period and the start date of the combined low-temperature process and the negative effective accumulated temperature of the combined low-temperature process is analyzed, so as to determine the pre-flowering low-temperature index that can be used for forecasting the flowering period of each batch of osmanthus fragrans.