Special controlled release fertilizer for selenium-rich sweet potatoes and preparation method thereof

A sweet potato-specific, selenium-enriched sweet potato technology, applied in the application, nitrogen fertilizer, potash fertilizer and other directions, can solve the problems of not being able to meet the needs of sweet potato well, unable to achieve simultaneous nutrition of fertilizers, complicated production process, etc., and achieve low cost, reduce fixed, Simple effect of preparation process equipment

Inactive Publication Date: 2016-04-20
KINGENTA ECOLOGICAL ENG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This fertilizer is mainly suitable for water-deficient dry farming areas, and the fertilizer production process is complicated and the cost is high
Although the existing special fertilizers for sweet potatoes are more beneficial to the growth of sweet potatoes than general-purpose fertilizers,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A special controlled-release fertilizer for selenium-enriched sweet potatoes, which comprises a core fertilizer and a coating layer from the inside to the outside; the core fertilizer accounts for 90% of the total weight of the controlled-release fertilizer, and the coating layer accounts for 10% of the total weight of the controlled-release fertilizer. %.

[0035] The core fertilizer contains nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer and selenium fertilizer, the total content of nitrogen, phosphorus and potassium nutrients is 48%, and the nutrient ratio is N:P by weight 2 o 5 :K 2 O=2:1:3. The selenium fertilizer accounts for 0.68% of the total weight of the core fertilizer.

[0036] The nitrogen fertilizer is powdered urea, and the phosphate fertilizer is powdered monoammonium phosphate (N:P 2 o 5 :K 2 O=12:55:0), potassium fertilizer is K2 The O content is 50% potassium sulfate, and the selenium fertilizer is sodium selenite.

[0037] Th...

Embodiment 2

[0043] A special controlled-release fertilizer for selenium-enriched sweet potatoes, which consists of a core fertilizer and a coating layer from the inside to the outside; the core fertilizer accounts for 85% of the total weight of the controlled-release fertilizer, and the coating layer accounts for 15% of the total weight of the controlled-release fertilizer. %.

[0044] The core fertilizer contains nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer and selenium fertilizer, the total content of nitrogen, phosphorus and potassium nutrients is 46%, and the nutrient ratio is N:P by weight 2 o 5 :K 2 O=12:9:25. The selenium fertilizer accounts for 0.90% of the total weight of the core fertilizer.

[0045] The preparation steps are as follows:

[0046] (1) fertilizer core preparation: the ammonium nitrate 195kg of nitrogen content 34%, P 2 o 5 Content is 35% powdery heavy superphosphate 357kg, potassium chloride 555kg of potassium oxide content 60%, 80kg powd...

Embodiment 3

[0051] A special controlled-release fertilizer for selenium-enriched sweet potatoes, which comprises a core fertilizer and a coating layer from the inside to the outside; the core fertilizer accounts for 90% of the total weight of the controlled-release fertilizer, and the coating layer accounts for 10% of the total weight of the controlled-release fertilizer. %. The coating layer is composed of polycaprolactone and starch, wherein the additive starch accounts for 18% of the weight of the polycaprolactone.

[0052] The core fertilizer contains nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, selenium fertilizer and activated humic acid, the total content of nitrogen, phosphorus and potassium nutrients is 31%, and the ratio of nutrients is N:P by weight 2 o 5 :K 2 O=10:6:15. The selenium fertilizer accounts for 0.47% of the total weight of the core fertilizer. The activated humic acid is coated on the outer particle layer of the nitrogen, phosphorus and pot...

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Abstract

The invention relates to a special controlled release fertilizer for selenium-rich sweet potatoes and a preparation method thereof. The special controlled release fertilizer for selenium-rich sweet potatoes comprises core fertilizers and a coating layer, wherein the core fertilizers include nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers and selenium fertilizers; the total content of nitrogen phosphorus and potassium nutrients is 30-50%; the selenium fertilizers account for 0.4-0.9% of the total core fertilizers by weight; the weight ratio of N to P2O5 to K2O is (1-2.5) to (0.6-1) to (2-3.5); the coating layer comprises polycaprolactone and an additive starch. The invention also provides a preparation method of the special controlled release fertilizer for selenium-rich sweet potatoes. The fertilizer is applied to the bottoms of planting furrows once before sweet potato transplantation and top application is unnecessary. The application amount of the fertilizer per mu is 40-60kg. The special controlled release fertilizer for producing selenium-rich sweet potatoes has the effects that the nutrients of the fertilizer meet the requirements of the whole growing periods of the sweet potatoes and have controlled release effects; fixation of selenium by soil can be reduced and the effective period can be prolonged.

Description

technical field [0001] The invention relates to a special controlled-release fertilizer for selenium-enriched sweet potatoes and a preparation method thereof, belonging to the technical field of slow / controlled release fertilizers. Background technique [0002] Selenium is an essential nutrient element for human beings, and has various functions such as anti-aging and anti-oxidation. 72% of my country's regions are in selenium-deficient and low-selenium belts, and selenium deficiency in the environment will lead to various diseases in humans and animals. Due to the toxicity of inorganic selenate, selenium is often applied to the soil or sprayed on the leaves of crops to convert inorganic selenium into organic selenium, which enters the food chain through food crops and vegetables for human or animal utilization. [0003] Sweet potato is the fourth largest crop after rice, wheat and corn in my country. Sweet potatoes have a long growth period, high yield, and require a larg...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/00C05G3/80
CPCC05B1/02C05G3/00C05G3/80C05B1/04C05B7/00C05C1/00C05C3/00C05C9/00C05D1/02C05D9/02C05F11/02
Inventor 高璐阳王怀利陈宏坤郑磊张强刘文龙邹朋
Owner KINGENTA ECOLOGICAL ENG GRP
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