Topdressing fertilizer for walnut garden in autumn and preparation method thereof

Abstract

The invention belongs to the technical field of fertilizers and provides a topdressing fertilizer for a walnut garden in autumn and a preparation method thereof so as to strengthen walnut trees and increase all the nutrients essential for growth and development of soil and the trees in a relaxation period of the walnut trees in autumn. Effective components of the fertilizer comprise, by weight, 10 to 15% of nitrogen, 4 to 6% of phosphorus, 10 to 15% of potassium, 0 to 3 % of calcium, 0 to 3% of magnesium, 0 to 3% of sulfur, 0 to 0.3% of iron, 0 to 0.4% of zinc, 0.4% of copper, 0 to 0.2% of boron, 0 to 0.3% of manganese, 0 to 0.2% of molybdenum, 0 to 0.2% of chlorine and 8 to 10% of humic acid. The topdressing fertilizer provided in the invention substantially meets demands of the walnut trees for all the nutrients needed in annual growth. The fertilizer is especially applied after harvesting of the walnut trees, can further improve photosynthesis of leaves, promotes root growth, strengthens the walnut trees and increases later-stage accumulation of nutrients in the trees and soil. The absorptivity of the fertilizer is high and free of waste, and fertilizer efficiency rapidly takes effect and is powerful; the preparation method has the advantages of a simple process, low cost and suitability for industrial production.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to an autumn topdressing fertilizer for walnut orchards and a preparation method thereof. Background technique [0002] Nutrients that must be supplied for the growth and development of fruit trees are: carbon, hydrogen, oxygen and large elements of nitrogen, phosphorus, potassium, medium elements of calcium, magnesium, sulfur, trace elements of iron, zinc, copper, boron, manganese, molybdenum, chlorine, etc. 16 They are all important and cannot be substituted for each other. The one that affects growth the most is the one that is most lacking. Fruit trees have tall bodies, well-developed root systems, high yields, and long lifespans, and need to absorb a lot of nutrients. If the supply is insufficient or unbalanced, physiological disorders will occur and deficiencies will occur. If the supply is excessive, poisoning symptoms will also occur, resulting in abnormal g...

AI Technical Summary

Problems solved by technology

Moreover, due to the large number of trace elements such as calcium, magnesium, sulfur, iron, zinc, copper, boron, manganese, molybdenum, and chlorine, there are many types of trace element fertilizers on the market, especially trace element fertilizers are mainly foliar fertilizers. Spraying fertilizer, this kind of fertilizer can only be selected after professional diagnosis after the symptoms of nutrient deficiency appear in the tree body, and the technical difficulty of preparation and time-consuming and laborious spraying make fruit farmers rarely use foliar fertilizer

As for the trace element fertilizer used in soil application, due to the small amount, it is difficult for fruit growers to apply it evenly into the soil

It often causes local fruit tree poisoning in areas where a large amount of soil is applied, and because the allowable range of the amount of application is narrow, it is difficult for fruit growers to control, and less use of trace element fertilizers

Fruit trees can only rely on the absorption of necessary trace elements from the soil, but since fruit trees have a long lifespan and are perennial plants, they can’t change stubble on the same land for many years, so the trace elements in the soil will be seriously deficient , cannot meet the demand

Even if some medium and trace element fertilizers are applied to the soil, the destruction of the soil aggregate structure makes it difficult for the fruit trees to absorb nutrients, and it is still impossible to obtain an appropriate amount of 16 kinds of nutrients, especially after the fruit trees are ripe and fruit is picked, the fruit growers give up on the fruit trees even more. management after autumn, ignoring the nutrition supplement and tree recovery after fruit picking