2. Trees with large and deep roots should be deep-fertilized and the scope should be large, such as pine, ginkgo, skunk, acacia, etc.; shallow-rooted trees, fertilizer should be shallow, range should be small, such as Fatong, Amorpha And flower shrubs and so on.

3, organic fertilizer should be fully fermented, cooked, avoid using raw manure, and the concentration should be thin, not suitable for block application.

4, after fertilization, must be timely and adequate irrigation, so that the fertilizer infiltrated into the soil.

5. Apply fertilizer when the weather is clear and the soil is dry. Rainy days, because the roots absorb water slowly, not only nutrients are not easily absorbed, but they are also washed away by rain, causing waste.

6, sand, slopes and other vulnerable to loss of nutrients, so fertilization should be deeper.

7. Nitrogen fertilizer has strong permeability in soil, so it can be applied shallowly to make it gradually penetrate into the root distribution layer of trees and be absorbed by trees. Potassium fertilizer has poor permeability, and the permeability of phosphate fertilizer is worse, so it is better to apply deeper to the root system. More distributed.

8, basal fertilizer to play a slower effect, should be deep; fertilizer fertilizer effect is faster, should be shallow Shi, for the tree to absorb in time.

9. Foliar fertilizer enters the leaves through the leaf stomata and then transports them to various organs. Generally, the young leaves absorb faster than the old leaves, and the back of the leaves absorbs faster than the leaves. Therefore, spray fertilizer must be sprayed, so that it is conducive to absorption.

10, foliar fertilizer to strictly control the concentration, so as not to burn the leaves, it is best to spray on cloudy days or sunny before 10 o'clock in the morning and after 4 o'clock in the afternoon, so as to avoid high temperatures affect fertilizer efficiency or lead to phytotoxicity.

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