In order to improve the quality and yield of daylily, based on the nutritional content testing results of daylily in different production areas of Yunzhou District, Datong City, Shanxi Province from 2019 to 2021, data analysis and model construction methods were used to explore meteorological factors and other factors that affect the quality of daylily. A nonlinear regression model was constructed to determine the suitability of each factor for daylily, revealing the mechanism of their impact on the quality of daylily. The results showed that the crude fiber content in dried daylily was significantly positively correlated with the average lowest temperature during the seedling and bolting stages, with correlation coefficients of 0.695 0. The soluble total sugar content was significantly positively correlated with the average highest temperature and daily temperature range during the bolting stage of daylily, with correlation coefficients of 0.719 7 and 0.733 3. There was a significant negative correlation between vitamin B2 and the average highest temperature and daily temperature range throughout the entire growth period, with correlation coefficients of -0.700 0. There was a significant negative correlation between total amino acids and accumulated temperature of ≥5 ℃ during the emergence stage of daylily, with a correlation coefficient of -0.728 0. There was a extremely significant positive correlation with the average lowest temperature during the seedling and bolting stages, with correlation coefficients of 0.828 5 and 0.920 5. Meanwhile, changes in soil environmental temperature, meteorological factors, and biochemical factors were the three key factors affecting the suitability of daylily, affecting the entire process of its growth and development. Therefore, it was necessary to grasp the relationship between various influencing factors and the quality of daylily, adopt scientific planting techniques and management guidance, improve the quality and market competitiveness of daylily, and promote the sustainable development of local agricultural economy.
利用农田小气候观测仪,实时采集试验地的温度、湿度、光照、风速等气象数据,以获取影响黄花菜品质的气象因素详细信息。以3个地区省级气象站1991—2021年气象资料作为试验材料,分别选取黄花菜出苗期、青苗期、抽薹期、开花期等全生育阶段的平均气温(Tave)、平均最高气温(Tmax)、平均最低气温(Tmin)、气温日较差(即一天内最高温度和最低温度之间差(Diurnal temperature range)、≥5 ℃积温(Accumulated temperature)和降水量(Precipitation)等作为黄花菜品质气象影响因素。
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