Medium trace element fertilizer special for gramineous crops and preparation method and application thereof

A technology for medium and trace elements, grass crops, applied in application, fertilizer mixture, layered/coated fertilizer, etc., can solve the problems of poor degradation performance and environmental protection of polymer resin coating materials, achieve long degradation cycle, promote Dissolution release, high nutrient availability effect

Active Publication Date: 2021-06-22
上海永通生态工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of slow-release fertilizer has a long nutrient release period and good controllability, but the disadvantage is that the degradation performance of the polymer resin coating material is poor. Even if the modified material is used, it still takes 3-5 years to degrade. There are certain environmental issues

Method used

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  • Medium trace element fertilizer special for gramineous crops and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a) First, calcium hydroxide, calcium sulfate, magnesium hydroxide, magnesium carbonate, manganese carbonate, manganese hydroxide, zinc hydroxide, iron hydroxide, iron phosphate, and copper hydroxide inorganic compound raw materials are respectively pulverized to below 40 mesh.

[0036] b) The powder raw materials obtained by pulverizing in the previous stage are weighed in proportion. Calcium hydroxide 14 kg, calcium sulfate 10 kg, magnesium hydroxide 10 kg, magnesium carbonate 10 kg, manganese carbonate 5 kg, manganese hydroxide 5 kg, zinc hydroxide 5 kg, iron hydroxide 7 kg, iron phosphate 3 kg, 1 kg of copper hydroxide, mixed together evenly for later use.

[0037] c) Configure the binder solution.

[0038] Weigh 5 kg of PVA-1788 polyvinyl alcohol (polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 88%), slowly add 95 kg of water at 30°C, slowly stir to dissolve, and heat up to 40°C for 2 hours. After the polyvinyl alcohol is c...

Embodiment 2

[0044] a) First, calcium hydroxide, calcium sulfate, magnesium hydroxide, magnesium carbonate, manganese carbonate, manganese hydroxide, zinc hydroxide, iron hydroxide, iron phosphate, and copper hydroxide inorganic compound raw materials are respectively pulverized to below 40 mesh.

[0045] b) The powder raw materials obtained by pulverizing in the previous stage are weighed in proportion. Calcium hydroxide 10 kg, calcium sulfate 10 kg, magnesium hydroxide 8 kg, magnesium carbonate 10 kg, manganese carbonate 7 kg, manganese hydroxide 5 kg, zinc hydroxide 7 kg, iron hydroxide 10 kg, iron phosphate 5 kg, 3 kilograms of copper hydroxide, mix together and set aside.

[0046] c) Prepare the binder solution.

[0047] Weigh 5 kg of PVA-1788 polyvinyl alcohol, slowly add 95 kg of water at 30°C, slowly stir to dissolve, and raise the temperature to 40°C for 2 hours, and wait until the polyvinyl alcohol is completely dissolved for use;

[0048] Weigh 1 kg of xanthan gum, add 99 kg o...

Embodiment 3

[0053] a) First, calcium hydroxide, calcium sulfate, magnesium hydroxide, magnesium carbonate, manganese carbonate, manganese hydroxide, zinc hydroxide, iron hydroxide, iron phosphate, and copper hydroxide inorganic compound raw materials are respectively pulverized to below 40 mesh.

[0054] b) The powder raw materials obtained by pulverizing in the previous stage are weighed in proportion. Calcium sulfate 24 kg, magnesium carbonate 20 kg, manganese carbonate 12 kg, zinc hydroxide 6 kg, iron hydroxide 14 kg, copper hydroxide 2 kg, mix together and set aside.

[0055] c) Prepare the binder solution.

[0056] Weigh 5 kg of PVA-1788 polyvinyl alcohol, slowly add 95 kg of water at 30°C, slowly stir to dissolve, and raise the temperature to 40°C for 2 hours, and wait until the polyvinyl alcohol is completely dissolved for use;

[0057] Weigh 1 kg of xanthan gum, add 99 kg of water at 30°C, slowly stir to dissolve, and heat up to 40°C for 1 hour, and wait for the xanthan gum to di...

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Abstract

The invention provides a medium trace element fertilizer special for gramineous crops. The medium trace element fertilizer is composed of a medium trace element inner core and an organic layer. The medium trace element inner core is composed of inorganic compounds of medium trace elements and a binder, wherein the inorganic compounds of the medium trace elements are inorganic compounds of calcium, magnesium, manganese, zinc, iron and copper; the binder is composed of a polyvinyl alcohol aqueous solution and a xanthan gum aqueous solution; and the organic layer is mineral source humic acid. According to the invention, the dissolution rate of nutrients can be flexibly controlled according to the concentration of wheat root acid secretions specific to the root system of gramineous crops, so that the growth requirements of crops are met, and the on-demand supply of nutrients is really realized.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, and in particular relates to a long-acting medium trace element fertilizer suitable for gramineous crops, a preparation method and application thereof. Background technique [0002] Long-acting fertilizers are recognized by more and more users because of their high nutrient utilization efficiency and low environmental pollution, and they are also supported and encouraged by national policies. Long-acting fertilizers not only bring benefits in terms of economy and environmental protection, but also save labor in terms of production management and field operations. In addition, another indirect benefit of long-lasting fertilizers is less field handling, less damage to crops or damage to soil structure. [0003] At present, the main type of long-acting fertilizer is the coated type, and the coating is mainly made of polymer organic matter such as resin. The slow-release principle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/80C05G5/12C05G5/30
CPCC05G3/40C05G3/80C05B17/00C05G5/12C05G5/30C05D3/00C05D3/02C05D5/00C05D9/02C05F11/02
Inventor 石称华钱志红连晓敏
Owner 上海永通生态工程股份有限公司
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