How does Podopine trees survive the winter safely?
Low temperatures in winter are a severe test for the southern plant Podocarpa, especially in the northern region where extreme weather at minus 10℃ often occurs. Mastering scientific maintenance methods can greatly improve the survival rate of Podocarpus chinensis through winter. This paper explains in detail the key points of winter protection of Podocarpus chinensis from three dimensions: temperature, light, and water and fertilizer management. Four core measures for winter maintenance of Podocarpus japonica are precise temperature control. The optimal hibernation temperature of Podocarpus japonica is 3-8℃. When it is below 0℃, multiple layers of protection are needed: 1. Plant plants locally to build windproof sheds and cover them with double plastic film + non-woven fabrics. Move the potted plants to the indoor sun room and keep the temperature difference between day and night ≤15℃3. Wrap the trunk with straw mat + thermal insulation cotton, focus on protecting the trunk 50cm above the ground. Intelligent adjustment of lighting requires 4 hours of direct light every day in winter: ·Full sunshine on sunny days from 10:00 to 15:00·Use plant fill light (wavelength 640-660nm) on rainy days·Regularly turn the potted plants to ensure uniform light reception Scientific water management adopts the "three-look" watering method: 1. Look at the soil: Insert a bamboo stick to detect the humidity at a depth of 5 cm 2. Look at the weather: Stop watering 3 days before rain and snow 3. Check the status: The strategy for replenishing water and nutrient supply at noon when the leaves are micro-rolled is strictly stopped from November to February of the following year, and the key points are: ·Apply sufficient phosphorus and potassium fertilizers in late autumn (P2O5 ≥40%)·Spraying alginate foliar fertilizer every month in winter (diluted 2000 times)·In early March, slow-release fertilizer awakened the root system to the minus 10℃ limit challenge. Experimental data showed: -Short-term (≤72 hours)-10℃: survival rate 83%-lasting at-10℃ for more than 5 days: survival rate dropped sharply to 27% Emergency treatment process: ① Immediately build a temporary greenhouse (built-in heating lines) ② Pour 35 ° C warm water on the roots (add 0.1% sodium nitrophenolate) ③ Trim frostbitten branches (apply wound healing agent to the incision) Through the triple protection system of precise temperature control, light optimization, and moisture control, in conjunction with the extreme weather emergency plan, Podocarpa can safely pass the low temperature test of-10℃. It is recommended that growers in the north give priority to cold-resistant varieties (such as Pearl Podocarpus) and establish a long-term meteorological monitoring mechanism.