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Acidic soil conditioner with straw as raw material, preparation method and application thereof

A soil conditioner and acidic soil technology, which is applied in the field of acidic soil conditioner and its preparation, can solve the problems that soil conditioner is difficult to be widely used, and achieve the effects of promoting the formation of soil aggregate structure, enhancing adsorption activity, and increasing alkali replacement capacity

Active Publication Date: 2017-02-01
湖南慧谷农业生态研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to realize the comprehensive utilization of agricultural waste straw and solve the problem that the existing soil conditioner is difficult to be widely used, the present invention provides an acidic soil conditioner using straw as raw material and its preparation method, which realizes environmental protection, no pollution, and low-cost improvement Soil

Method used

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  • Acidic soil conditioner with straw as raw material, preparation method and application thereof
  • Acidic soil conditioner with straw as raw material, preparation method and application thereof
  • Acidic soil conditioner with straw as raw material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1 is the acidic soil conditioner with straw as raw material

[0038] (1) crushing straw raw materials to 16 meshes to obtain straw powder;

[0039] (2) Mix straw powder and attapulgite in a weight ratio of 50:20;

[0040] (3) Add the above mixture into lye solution containing 1.5% sodium hydroxide and 0.5% quicklime, the solid-to-liquid ratio is 10:100, heat to boiling, and keep for 30 minutes;

[0041] (4) Solid-liquid separation, drying the solid part to a water content≤30%;

[0042] (5) adding an appropriate amount of hydrochloric acid to the above liquid part to adjust the pH to neutral, and precipitating the lignin, and drying the solid part after solid-liquid separation until the water content is ≤ 30%;

[0043] (6) Mix the above two dried solid products with calcium magnesium phosphate fertilizer and ironmaking slag in a ratio of 70:10:20 to obtain a soil conditioner.

Embodiment 2

[0044] Embodiment 2 is the acidic soil conditioner with straw as raw material

[0045] (1) crushing straw raw materials to 16 meshes to obtain straw powder;

[0046] (2) Mix straw powder and attapulgite in a weight ratio of 60:20;

[0047] (3) Add the above mixture into lye solution containing 1.5% sodium hydroxide and 0.5% quicklime, the solid-to-liquid ratio is 10:100, heat to boiling, and keep for 30 minutes;

[0048] (4) Solid-liquid separation, drying the solid part to a water content≤30%;

[0049] (5) adding an appropriate amount of hydrochloric acid to the above liquid part to adjust the pH to neutral, and precipitating the lignin, and drying the solid part after solid-liquid separation until the water content is ≤ 30%;

[0050] (6) Mix the above two dried solid products with calcium magnesium phosphate fertilizer and ironmaking slag at a ratio of 80:10:10 to obtain a soil conditioner.

Embodiment 3

[0051] Embodiment 3 is the acidic soil conditioner with straw as raw material

[0052](1) crushing straw raw materials to 16 meshes to obtain straw powder;

[0053] (2) Mix straw powder and attapulgite in a weight ratio of 40:20;

[0054] (3) Add the above mixture into lye solution containing 1.5% sodium hydroxide and 0.5% quicklime, the solid-to-liquid ratio is 10:100, heat to boiling, and keep for 35 minutes;

[0055] (4) Solid-liquid separation, drying the solid part to a water content≤30%;

[0056] (5) adding an appropriate amount of hydrochloric acid to the above liquid part to adjust the pH to neutral, and precipitating the lignin, and drying the solid part after solid-liquid separation until the water content is ≤ 30%;

[0057] (6) Mix the above two dried solid products with calcium magnesium phosphate fertilizer and ironmaking slag in a ratio of 60:15:25 to obtain a soil conditioner.

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Abstract

The invention relates to an acidic soil conditioner with straw as a raw material, a preparation method and an application thereof. The preparation method includes the steps of: mixing straw powder with attapulgite, adding the mixture to an alkali liquid and heating the liquid for a certain time, performing solid-liquid separation and drying the solid; and adding hydrochloric acid to the liquid to precipitate lignin, performing solid-liquid separation and drying the solid; and uniformly mixing the two solids with a calcium magnesium phosphate fertilizer and ironmaking slag according to ratio to obtain the acidic soil conditioner. The acidic soil conditioner is alkaline and has high content of organic substances, is high in specific surface area and adsorption property, contains various nutrients required by crops, can be used for regulating the pH of soil and adsorbing and passivating heavy metal and increasing organic substances in soil, promotes formation of aggregate structures in soil, improves permeability of soil, promotes growth of plants and is reduced in risk of soil caking when being applied.

Description

technical field [0001] The invention relates to the technical field of agricultural environment conservation and restoration, in particular to an acidic soil conditioner using straw as a raw material and its preparation method and application. Background technique [0002] China's annual output of crop straw is about 700 million tons, ranking first in the world. In many parts of the country, there is a large amount of residual straw that can be utilized. In addition to making paper, making feed or feed raw materials, making manure and returning to the field, a large amount of straw is directly burned every year, causing pollution and waste. With the implementation of the national policy of prohibiting open burning of straw, a large amount of straw needs to be disposed of urgently, and new technical means should be vigorously developed to make resourceful utilization of straw. [0003] At the present stage, more than 100 million tons of straw have been returned to the field...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/04C09K109/00C09K101/00C05G3/80
CPCC05D3/02C05G3/80C09K17/40C09K2101/00C09K2109/00C05D9/00C05F11/00C05G1/00
Inventor 谭石勇文亚雄刘备杨梅玉邱尧刘翔杨丽丽
Owner 湖南慧谷农业生态研究院有限公司
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