Preparation method of high-calcium organic fertilizer

Abstract

The invention relates to a preparation method of high-calcium organic fertilizer. The preparation method is characterized in that the low-temperature freeze drying technology is used to perform fast freeze drying on harvested Sedum aizoon L. which is a special plant extremely high in calcium content, the loss of calcium contained in the Sedum aizoon L. is prevented to a maximum extent, the calciumions contained in the Sedum aizoon L. are allowed to keep a free state, and accordingly the calcium ions can be easily absorbed and utilized by crops; the dried Sedum aizoon L. obtained after the freeze drying is crushed into power of 60-100 meshes to obtain high-calcium powder; according to different application manners, the high-calcium powder is added into thoroughly-decomposed farm manure toobtain base fertilizer, is directly added into edible fungi or soilless culture substrates to obtain high-calcium powder fertilizer or is soaked into water to obtain high-calcium liquid fertilizer after dregs are filtered and removed; high-calcium fertilizer produced according to organic standards is organic high-calcium fertilizer.

Description

technical field [0001] The invention belongs to the field of agricultural environmental protection, and in particular relates to a preparation method of high-calcium fertilizer. Background technique [0002] The content of calcium plants in the body is generally about 0.5%, which belongs to the medium element of plants. As early as 1860, calcium was recognized as one of the essential nutrients for plant growth. Farmers in our country have long used lime, gypsum, bone meal, plant ash and other calcium-containing substances as fertilizers to supplement calcium to crops. In recent years, due to the continuous increase of large amounts of nitrogen, phosphorus, and potassium fertilizers, crop yields have continued to increase. Due to nutritional balance requirements, crops have increasingly urgent needs for calcium and other medium and trace elements. The research and application of trace elements has been paid attention to. In some areas, the use of medium and trace elements s...

AI Technical Summary

Problems solved by technology

[0012] In the existing technology of calcium supplementation of crops, from the perspective of cultivation technology and technological process, most of them are supplemented with calcium fertilizers such as lime and gypsum in the soil during the cultivation process, and calcium supplements are also provided by spraying foliar fertilizers. The above methods The disadvantages are: the technical operation is complicated, the application amount is difficult to control, the manpower and material resources invested are large, and the purpose of calcium supplementation is often not achieved, and most of the input is chemically synthesized calcium, which is easy to cause environmental pollution and does not meet the requirements of organic production.

However, because the calcium contained in high-calcium vegetables is easily lost during processing, especially the high-temperature drying causes the calcium in the plant to be fixed and difficult to release, reducing the utilization rate of calcium.