Abstract:

In order to study and analyze the effects of agricultural heat resources and meteorological factors such as maximum temperature, minimum temperature, agricultural boundary temperature, accumulated temperature, initial and final frost days, and frost free period on the growth and development speed and yield formation of marigold in the Longdong region during the marigold planting period, a comparative experimental analysis method was used to explore the ways and methods of avoiding meteorological disasters such as frost in marigold planting and production. The optimal transplanting period that is most conducive to the growth and development of marigold had been selected. Through analysis and research, the ecological climate zoning for marigold cultivation in the Longdong region had been proposed, achieving the goal of improving climate resource utilization, seeking benefits and avoiding harm, and increasing yield and efficiency. On the premise of avoiding freezing damage, marigold should be transplanted as early as possible to extend the growth period, increased flower yield, and achieved higher planting benefits. The suitable transplanting period for marigold in the Longdong region is influenced by temperature, with significant differences across regions. The longest transplanting period varies by about 30 days, mainly concentrated in the first and middle of May. Research has found that terrain factors and different climate types also have a significant impact on the transplantation of marigold.

Key words: tagetes erecta L, climatic conditions, resource utilization, adaptability, analytical research