Purple magnolia leaves dry off phenomenon, there may be the following reasons: First, the cellaring time is too early, the cellar temperature is high, poor ventilation, resulting in leaf overwintering, and new leaf growth is poor and semi-dry. The second is that when the cellar is out, it does not take the first adaptive exercise, making it unable to adapt to the environment outside the cellar, causing the new leaves to fall off. The third is that the ambient temperature is too high during the summer and the lighting is too strong and the ventilation conditions are poor. The fourth is that the basin soil has not been changed over for a long period of time, so that the tip of the meat nutrition root meets the pelvic wall, resulting in burns at the root of the root when the temperature is high and dry, resulting in half dead leaves; In addition, malnutrition, causing the leaves to yellow; soil Compaction, excessive water, causing rot and dead leaves; irrigation water, acidity is not enough, high salt content, will cause the leaves yellow, half-blight. Ip Video Intercom,Ip Intercom System,Ip Video Intercom System,Ip Door Entry System Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com
The measures that should be taken are as follows: First, remove all dead leaves and old leaves and burn them before entering the pit in winter to reduce the possibility of leaf spot disease. Second, the storage time should be reduced to 0 °C after the temperature, reduce the temperature in the pit during the winter, in order to maintain the basin soil does not freeze, it is best not to extract new leaves in the pot when the cellar. It may also be considered to bury it together in a leeward sunny seedbed. The aboveground part is covered with straw or film. It can withstand a low temperature of -12°C at least, and take care not to let the roots freeze. Third, from June to August, the potted plants can be moved to a cool, ventilated place that can avoid the sun and the sun, and often spray water on the plants and the surrounding environment to create a cool and warm semi-negative environment. The fourth is to change the soil in the spring when you leave the house, use a pot that is slightly larger than the original pot, cut the necrotic root, cut off 1/3 of the concretion, and re-use loose, fertile, well-drained Acid culture soil is well planted. The fifth is the growing season, pay attention to frequent loose soil, fertilization, and adding 0.1% of ferrous sulfate powder in the water, which can promote vigorous plant growth, avoid physiological yellowing, and for the coming year to open a good flower, more flowering To lay a good foundation for nutrition.