Common Physiological Obstacles of Cut Lily Flowers

1. The phenomenon of yellow leaves and fallen leaves caused by poor soil permeability, followed by root damage caused by salt accumulation and excessive watering, as well as lack of nutrients, excessive fertilization, water stress, low temperature and so on. Therefore, the soil should be improved before planting, watering must not be too wet.

2. In addition to varieties, the reason for leaf burning is mainly due to excessive fluctuations in temperature, light, moisture, humidity and other factors; lack of calcium and high fluorine content will also cause leaf burning. Therefore, in the daily management, especially in the facility cultivation management, it is necessary to avoid excessive fluctuations of environmental factors, such as temperature difference between day and night, environmental temperature, light intensity, etc., foliar spraying calcium nitrate or calcium chloride can avoid leaf burning caused by lack of calcium, and for high fluorine content, we should control the fluorine content in chemical fertilizer, irrigation water and matrix, detect soil and water quality in advance, and rinse perlite with clean water.

3. Those who die when the bud ≤ is 0.25cm and those who die after the bud length > 0.25cm are called "falling buds". The changes of environmental factors (low light, high humidity, low temperature, etc.) can cause bud elimination and bud drop; poor root development caused by poor soil permeability leads to bud elimination and bud drop, and the EC value of irrigation water is on the high side. "returning salt" caused by long-term unreasonable application of chemical fertilizer and flood irrigation can cause bud elimination and bud drop. Therefore, improving the soil before planting, controlling the EC value of water (preferably Rain Water) and rational application of chemical fertilizer are the key measures to avoid bud elimination and bud drop.

4. The common phenomena of element deficiency are N, Fe, Mg, B, Ca and so on. When N is deficient, the color of the whole leaf becomes lighter, and the plant is slender and soft in the later stage: the mesophyll tissue between the veins of young leaves is yellow when lacking Fe; when lacking Mg, the plant grows slowly, the leaf color is light and bends downward; too high and too low soil acidity will cause the deficiency of trace elements such as Mn, B, etc., and the soil pH value should be below 6.5. the highest should not exceed 7. Fertilizer should be applied thinly and more, and after planting for 4 weeks, topdressing fertilizer should be used with 100KgCa (No3) 2 / ha, 100Kg available nitrogen / ha and other fertilizers. Until 3 weeks before harvest, the total concentration of topdressing fertilizer should be less than 1%, not more than 1.5%, and the interval should be 7-10 days.