Temperature-sensitive nano-adhesive coated sugarcane-rice modified carbon-based slow-release nitrogen fertilizer and preparation method thereof

A rice modified carbon and nano-glue technology, which is applied in the direction of layered/coated fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems that it is difficult to greatly improve the efficiency of nitrogen fertilizer coating and the performance of slow and controlled release, so as to improve the effective supply level , excellent holding capacity, and strong operability

Inactive Publication Date: 2020-03-31
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating structure used in this technology is based on the three-dimensional structure of the hydrogel network. It is difficult to greatly improve the coating efficiency and slow-controlled release performance of nitrogen fertilizers by building an internally and externally combined coating system with sugarcane leaf cellulose gel.
On the other hand, although bagasse biochar has a certain improvement and synergistic effect in improving farmland soil quality, soil fertility and water use efficiency, if it is not modified, it will have obvious advantages if it is directly used as a slow and controlled release coating material. limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, a kind of temperature-sensitive nano-glue coated sugarcane-rice modified carbon-based slow-release nitrogen fertilizer #1 comprises the following steps:

[0017] (1) Preparation of temperature-sensitive nano-glue: Take 10.8 parts of N-isopropylacrylamide, 1.2 parts of N,N'-methylenebisacrylamide, and 88 parts of water in parts by mass; 450-600 rpm Mix with magnetic force for 1 min, add 0.2 parts of Triton X-100; stir and preheat at 70°C for 30 minutes, add 0.3 parts of sodium persulfate solution in 3 times in equal amounts, and continue stirring for 4~6 hours to obtain temperature sensitive type nano glue;

[0018] (2) Preparation of sugarcane-rice modified carbon: Dry sugarcane leaves and rice husks, crush them, mix them at a weight ratio of 1:1, and immerse them in 0.5 mol / L potassium oleate and magnesium chloride at equimolar concentrations. solution, stirred overnight, dried at 80°C, placed in a carbonization furnace, heated to 650°C at a heating rate...

Embodiment 2

[0021] Embodiment 2, a kind of temperature-sensitive nano-glue coated sugarcane-rice modified carbon-based slow-release nitrogen fertilizer #2 comprises the following steps:

[0022] (1) Preparation of temperature-sensitive nano-glue: Take 9.7 parts of N-isopropylacrylamide, 0.3 parts of N,N'-methylenebisacrylamide, and 90 parts of water in parts by mass; 450-600 rpm Min magnetic stirring to mix, add 0.3 parts of Triton X-100; stir and preheat at 70°C for 30 minutes, add 0.2 parts of sodium persulfate solution in 3 times in equal amounts, continue to stir and polymerize for 6 hours to obtain temperature-sensitive nano Glue;

[0023] (2) Preparation of sugarcane-rice modified carbon: Dry sugarcane leaves and rice husks, crush them, mix them at a weight ratio of 1:1, and immerse them in 1.0 mol / L potassium oleate and magnesium chloride at equimolar concentrations. solution, stirred overnight, dried at 80°C, placed in a carbonization furnace, heated to 550°C at a heating rate of...

Embodiment 3

[0026] Embodiment 3, a kind of temperature-sensitive nano-glue coated sugarcane-rice modified carbon-based slow-release nitrogen fertilizer #3 comprises the following steps:

[0027] (1) Preparation of temperature-sensitive nano-glue: Take 14 parts by mass of N-isopropylacrylamide, 0.7 part of N,N'-methylenebisacrylamide, 85.3 parts of water; 450-600 rpm Min magnetic stirring to mix, add 0.4 parts of Triton X-100; stir and preheat at 70°C for 30 minutes, add 0.2 parts of sodium persulfate solution in 3 times in equal amounts, continue to stir and polymerize for 6 hours to obtain temperature-sensitive nano Glue;

[0028] (2) Preparation of sugarcane-rice modified carbon: Dry sugarcane leaves and rice husks, crush them, mix them at a weight ratio of 1:1, and immerse them in 2.0 mol / L potassium oleate and magnesium chloride at equimolar concentrations. solution, stirred overnight, dried at 80°C, placed in a carbonization furnace, heated to 450°C at a heating rate of 10-20°C / min,...

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Abstract

The invention belongs to the technical field of fertilizer production, and particularly relates to a temperature-sensitive nano-adhesive coated sugarcane-rice modified carbon-based slow-release nitrogen fertilizer and a preparation method thereof. The slow-release nitrogen fertilizer comprises a temperature-sensitive nano-adhesive, sugarcane-rice modified carbon, carboxymethyl cellulose, bentoniteand a nitrogen fertilizer. According to the invention, a cross-linked structure is formed among temperature-sensitive nano-adhesive particles, and response can be made along with the change of external environment temperature; a water-fertilizer controlled-release system can be formed through the contraction / swelling process of the nano-adhesive particles, so the controlled release performance ofthe slow-release nitrogen fertilizer is fully improved; and the sugarcane-rice modified carbon not only contains rich organic carbon, potassium, magnesium, silicon and other nutrients necessary for plants, but also has excellent immobilization capacity for moisture and nutrients in field soil, and can significantly improve the quality of soil in a plough layer and improve the soil fertility whenused in farmlands. The preparation method is simple in production process and high in operability; and the prepared slow-release nitrogen fertilizer has the advantages of intelligent fertilizer feeding, long fertilizer efficiency period, environmental protection and the like.

Description

technical field [0001] The invention relates to a temperature-sensitive slow-release nitrogen fertilizer and a preparation method thereof, in particular to a temperature-sensitive nano-glue-coated sugarcane-rice modified carbon-based slow-release nitrogen fertilizer and a preparation method thereof, belonging to the technical field of fertilizer production. Background technique [0002] At present, the preparation of slow-release nitrogen fertilizers usually adopts coating technology, and the coating material, as a nitrogen fertilizer slow-release carrier, plays an important role in enhancing the slow release of fertilizers, improving fertilizer use efficiency and simplifying farmland fertilization. However, the traditional coating materials often lack the adaptability to the regional environment, and their slow and controlled release performance of fertilizers cannot be fully utilized, which makes the actual utilization efficiency of fertilizers in the field seriously low. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05G3/00C05G5/30
CPCC05D9/00C05G3/00
Inventor 胡朝华袁照年
Owner FUJIAN AGRI & FORESTRY UNIV
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