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Slowly/control released fertilizer special for field and its production process

A technology for controlled-release fertilizer and field, which is applied in the field of special slow/controlled-release fertilizer for field and its production field, can solve the problems of low yield increase effect of chemical compound fertilizer, low fertilizer utilization rate, etc., and achieves low price and high nitrogen fertilizer utilization rate. , good effect

Inactive Publication Date: 2007-06-06
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low production increase effect and low fertilizer utilization rate of chemical compound fertilizers, the purpose of the present invention is to provide a field-specific slow / control fertilizer with high hardness, long fertilizer efficiency, high utilization rate, simple preparation process and low cost. Release fertilizer and its production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Wrapping material preparation: according to the mixture of calcium oxide: magnesium oxide weight ratio = 1: 1 ~ 1.4 (weight ratio), mix evenly and set aside;

[0031] 2. Adhesive preparation: mix evenly by 70% phosphoric acid: 20% sulfuric acid = 1: 1~1.2 (weight ratio) for use,

[0032] 3. Sealant preparation: mix rosin and industrial alcohol to 10-20% for use,

[0033] 4. Production of slow / controlled release fertilizers for field use:

[0034] First put 410 kg of urea and 115 kg of monoammonium phosphate into the granulation disc; secondly, after spraying the binder, then spray the wrapping material, repeatedly spray the binder and the wrapping material; finally spray the sealant 30 kg, 100 kg of binder, and 345 kg of wrapping material. When the spheres reach more than 80%, enter the drying cylinder to dry naturally. After packaging, it is a special slow / controlled release fertilizer for corn.

[0035] deal with

Embodiment 2

[0037] The preparation of the wrapping material, the preparation of the adhesive, and the preparation of the sealant are the same as in Example 1;

[0038] The production of slow / controlled release fertilizers for field use is as follows:

[0039] First put 380 kg of urea and 230 kg of monoammonium phosphate into the granulation disc; secondly, after spraying the binder, then spray the wrapping material, and repeatedly spray the binder and the wrapping material several times. The final spray volume is: 50 kg of sealant, 150 kg of binder, and 190 kg of wrapping material. When the ball forming rate reaches more than 80%, enter the drying cylinder to dry naturally. After cooling and sieving, the particle diameter is 2-4mm. The particles within the range are measured and packaged as commercial fertilizers.

[0040] Type of fertilizer

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Abstract

The present invention discloses one kind of slowly / control released fertilizer specially for field and its production process. The fertilizer consists of urea 30-45 weight portions, monoammoium phosphate 10-45 weight portions, mixture of calcium oxide and magnesium oxide as the coating material 20-45 weight portions, mixture of phosphoric acid and sulfuric acid as the adhesive 10-15 weight portions, and industrial alcohol solution of rosin as the sealant 3-5 weight portions. The fertilizer is produced with the materials and through pelletizing, stoving, cooling and sieving and has granularity of 2-4 mm. The slowly / control released fertilizer has obvious slowly / control releasing effect, high nitrogen fertilizer utilizing rate and other advantages.

Description

Technical field: [0001] The invention relates to a chemical compound fertilizer, in particular to a special slow / controlled release fertilizer for field and a production method thereof. Background technique: [0002] At present, one of the outstanding problems in the application of chemical fertilizers is that the effect of increasing the production of fertilizers is not high, and the utilization rate of fertilizers is low. According to relevant research data from the Food and Agriculture Organization of the United Nations and the United States Department of Agriculture, the increase in grain production per unit of chemical fertilizer in China has been decreasing. From 1948 to 1952, an average of 14.8 tons of chemical fertilizer per ton increased grain production. Increased production by 11.5 tons. From 1961 to 1971, the average grain yield increased by 8.3 tons per ton of chemical fertilizer. From 1979 to 1981, the average grain yield increased by 5.8 tons per ton of chemica...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05G3/08C05G5/00C05C9/00C05B7/00C05G3/90
Inventor 谭金芳韩燕来介晓磊
Owner HENAN AGRICULTURAL UNIVERSITY
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