A fertilization method for continuously replenishing nutrients to apple trees

Abstract

The invention discloses a fertilizer application method for continuously supplementing nutrients to an apple tree. The fertilizer application method is characterized by applying fertilizer twice in February and July of each year, wherein bulk blended fertilizer A and a blending water-retaining agent are applied at the first time, and a bulk blended fertilizer B and a blending water-retaining agent are applied at the second time; the bulk blended fertilizers A and B are prepared from fast-reacting fertilizer and controlled release fertilizer according to nutrient requirements of the apple tree in different stages; and the blending water-retaining agent is prepared from an agricultural water-retaining agent, polyaspartic acid, polyglutamic acid and ethylenediamine tetraacetic acid disodium. The cooperative application of the fast-reacting fertilizer, the controlled release fertilizer and the water-retaining agent into soil avoids the reduction of the water-retaining capacity of the water-retaining agent, and the nutrients can be slowly and continuously released, so that the requirements of the apple tree for different nutrients in different development stages in one year; furthermore, the total fertilizer application amount, the number of times of fertilizer application and great loss of the nutrients can be further reduced; the fertilizer can be saved, the labor can be saved, and the problems of fertilizer loss and water shortage of the apple tree are solved.

Description

(1) Technical field [0001] The invention relates to a fertilization method for continuously replenishing nutrients to apple trees, and belongs to the field of fruit tree fertilization. (2) Background technology [0002] Continuous supply of nutrients is an important condition to ensure the normal growth and development of apple trees. Scientific fertilization and fertilization of the soil are the main means to ensure the supply of nutrients to fruit trees. One-time fertilization, or multiple fertilization using fertilizer-water integration technology to ensure the nutrient needs of fruit trees throughout the year. These technical solutions require many times of fertilization, heavy workload, relatively high cost, and good irrigation conditions are also required. In order to reduce the frequency of fertilization, some fruit farmers adopt the "one shot" fertilization technology, that is, to apply all the nutrients needed for the whole year in autumn at one time, but fruit tre...

AI Technical Summary

Problems solved by technology

However, the nutrients of slow and controlled-release fertilizers must be released effectively with the help of water. The release situation is greatly affected by rainfall and irrigation conditions, and the rainfall period in apple production areas is not consistent with the demand period for apple nutrients. In dry seasons, such as spring, fruit trees When a large amount of nutrients are needed, the release of fertilizer nutrients is often interrupted due to lack of water, and then the fruit trees are defertilized; and what CN100429187C uses twice is the fertilizer of the same composition, which is difficult to meet the nutrient requirements of apple trees in different periods.