Long acting composite iron fertilizer and preparation method and use thereof

Abstract

The invention provides a slow-release compound iron fertilizer for treating yellows of camphor trees. The slow-release compound iron fertilizer comprises the following compositions: 25 to 45 percent of peat, 40 to 45 percent of organic fertilizer, 10 to 15 percent of low-phosphorus envelope slow release fertilizer and 5 to 15 percent of ferrous sulfate fertilizer. The slow-release compound iron fertilizer is obtained by mixing the organic fertilizer, the peat and the low-phosphorus envelope slow release fertilizer according to proportion, dissolving the ferrous sulfate fertilizer into a nontoxic waste acid solution with a pH value of approximately 3.4, and uniformly mixing two mixtures. The iron fertilizer has the advantages of high content of organic substances, low phosphorus content, low pH value, high fertilizer utilization rate, durable fertilizer effect, stable physicochemical properties and convenient application, and not only has the functions of improving the growth conditions of the camphor trees, promoting nutrient balance and strengthening the tree vigor but also has obvious effect of preventing and controlling physiological diseases caused by iron deficiency of the camphor trees. The iron fertilizer can be applied to treatment of calcareous soil iron-deficiency yellow camphor trees.

Description

technical field [0001] The invention belongs to the preparation of chemical fertilizers, and relates to a long-acting composite iron fertilizer for controlling yellowing of camphor trees in calcareous soils, and a preparation method and application thereof. Background technique [0002] Camphor tree (Cinnamomum camphora (L) Presl), also known as camphor, is an evergreen tree with well-developed root system, straight trunk, tall and long-lived, and is listed as a national second-class protected tree species. Camphor tree has amazing noise-blocking ability due to its many branches and canopy stacking, and can resist high air pollution. It has the effect of fragrant environment and repelling mosquitoes, so it is also an excellent tree species for garden greening. Camphor trees are typical acid-loving plants. They are sensitive to iron deficiency and have high requirements on the growth environment. For example, there are a lot of construction waste and a large amount of domest...

AI Technical Summary

Problems solved by technology

At present, most of the iron fertilizers on the market are different types of inorganic iron fertilizers, and the effect of soil application is not ideal. For example, when ferrous sulfate heptahydrate is applied, iron ions will quickly combine with carbonate in the soil to form insoluble iron. compound, while Fe 2+ Easily converted to Fe 3+ become ineffective and not easily absorbed by plants, and foliar spraying is not only due to Fe 2+ easily oxidized to Fe 3+ If it fails, it is difficult to ensure uniform spraying, and the spots will turn green again, and the effect will not be good.

The new type of iron fertilizer is iron chelate, such as FeEDDHA, FeEDDHSA, FeEDDHMA, etc. This type of organic chelated iron fertilizer has wide adaptability and stable fertilizer effect, but its cost is expensive and the price is extremely high; the other is compound fertilizer. Iron fertilizer, such as: Chinese patent application discloses (application number: 200610011289.2) a kind of long-acting composite iron fertilizer, its preparation method and its use, Chinese patent application discloses (application number: 200510021548.5) a kind of organic iron fertilizer, Chinese patent The application discloses (application number: 96122189.5) the iron fertilizer for treating loofah yellowing disease, and the Chinese patent application discloses (application number: 97239983.6) spherical compound fertilizer. These iron fertilizers generally have low organic matter content, unbalanced nutrients, and no acidity. Medium and other characteristics, so the experimental results are not stable