Ginkgo Fertilizer Management Key Points I. Main nutrients that ginkgo needs to absorb Ginkgo biloba needs to absorb different nutrients at different stages of growth and development. The three elements N, P, and K account for about 45% of the dry weight of the tree. The proportion is small, but it is also essential. Second, fertilizer categories and use 1, base fertilizer application. Basal fertilizer mainly uses organic fertilizer and organic fertilizer, and can improve the soil structure, such as manure, compost, chicken, cattle, and other feces, generally Mushi 2000-3000 kg, the time is generally appropriate from September to October. After early autumn, the soil temperature is higher, which is conducive to the healing of root wounds and the ability to grow new roots. Increase the absorption capacity of the root system in the early spring of the second year. 2, timely fertilizer. Topdressing, also known as compensatory fertilizer, is beneficial to the year of strong trees, high yield and high quality, and supplements nutrients for the second year of flowering. Ginkgo biloba topdressing is characterized by: first, the type and quantity of topdressing are not limited; second, the growth time of new shoots of Ginkgo biloba is short, increasing the amount of foliage is its main contradiction. Therefore, the time required for topdressing is relatively strict. The principle of top dressing is based on the pre-growth stage. More than 70% of the fertilizer should be used in the early stage, and appropriate supplements can be made in the middle and later stages. Third, Ginkgo has a variety of business purposes, such as leaf harvesting, fruit harvesting, wood production, and greenery viewing. Therefore, the time, quantity and method of top dressing vary widely. Generally speaking, it is best to fertilize three times in a year, and in spring and early March in the first half of the year. In the early days of new root growth, the absorption ability of the root system is weak, and the consumption of nutrients such as leaf development and flowering is more, and the main application of nitrogen fertilizer is to appropriately add phosphate fertilizer; Early in the month. Just after the flowering period, the fruit grows rapidly, which is also the growth period of new shoots, and consumes more nutrients. At this time, fast-acting nitrogen fertilizer is still dominant, with a small amount of phosphorus fertilizer; autumn is about mid-late July, and it is a seed hard-core period. To improve the quality and yield of seeds, it is necessary to use a mixture of nitrogen, phosphorus and potassium. Third, pay attention to the matters of fertilization 1, scientifically determine the amount of fertilizer due to many factors affecting the amount of fertilizer, such as tree vigor, yield, age, species, soil, climate and management level. Therefore, we must consider a variety of factors and propose a reasonable fertilization program. At present, the amount of scientific fertilizer is determined according to the nutrient status of the tree. The application of leaf nutrient analysis is a reliable basis for determining the amount of scientific fertilizer, and the nutrient status of the leaf is used to determine the nutrient level of the tree. However, most fertilization is based on practical experience. 2. The best time for top dressing is in the evening, and the absorption and utilization of the root system are high before and after the evening. In addition, it is best to choose after the rain. 3, during the topdressing process, pay attention to some incompatibility. For example, acid fertilizers can only be used with acidic pesticides, but not with alkaline pesticides.
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