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Biochar fertilizer and preparation method and application thereof

A biochar and fertilizer technology, applied in the field of fertilizers, can solve problems affecting the safety of vegetable products, and achieve the effect of easy operation and reduced absorption

Inactive Publication Date: 2016-06-15
青岛洪润林业生物质能源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a biochar fertilizer and its preparation method and application in view of the current problem that soil heavy metal pollution affects the safety of vegetable products

Method used

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  • Biochar fertilizer and preparation method and application thereof
  • Biochar fertilizer and preparation method and application thereof
  • Biochar fertilizer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Effect of application of biochar fertilizer on inhibition of heavy metal absorption by leafy vegetables

[0029] The soil used was lightly polluted by heavy metals. The heavy metals in the 0-30cm soil were measured, and the heavy metal element contents were: Pb189.53mg / Kg, Cd0.42mg / Kg, As14.6mg / kg and Hg0.044mg / Kg.

[0030] The experimental crops were leafy vegetables (pak choy).

[0031] Biochar prepared from forestry wastes: biochar particle size 0.50-0.01mm, density 1.05g / cm 3 , the maximum water absorption is 298g / Kg, with a very fine honeycomb hollow body.

[0032] First take by weighing each component that is used for preparing biochar fertilizer, make the mass ratio of biochar and calcium oxide be 25:1, biochar and urea (containing N46%), diammonium phosphate (P 2 o 5 content is 44%), potassium sulfate (K 2 The mass ratio of O content 50%) is 4:1:1:1; first mix the above-mentioned biochar and calcium oxide evenly, then add urea, diammonium phosphat...

Embodiment 2

[0037] Example 2: Effect of application of biochar fertilizer on inhibition of heavy metal absorption by root vegetables

[0038] The soils used were moderately polluted by heavy metals. The heavy metals in the 0-30cm soil were measured, and the heavy metal element contents were: Pb199.4mg / Kg, Cd0.58mg / Kg, As21.00mg / kg and Hg0.087mg / Kg.

[0039] The test crop was root vegetable (carrot).

[0040] Biochar prepared from forestry waste for testing: biochar particle size 1.20-0.01, density 1.00g / cm 3 , the maximum water absorption is 450g / Kg, with a very fine honeycomb hollow body.

[0041] First take by weighing each component that is used to prepare biochar fertilizer, make the mass ratio of biochar and calcium oxide be 40:1, biochar and urea (containing N46%), diammonium phosphate (P 2 o 5 content is 44%), potassium sulfate (K 2 The mass ratio of O content 50%) is 6:1:1:1; first mix the above-mentioned biochar and calcium oxide evenly, then add urea, diammonium phosphate an...

Embodiment 3

[0046] Example 3: The effect of applying biochar fertilizer on the inhibition of heavy metal absorption by fruits and vegetables

[0047] The soil used is moderately polluted by heavy metals, and the content of heavy metals in the 0-30cm soil is determined to be: Cd0.57mg / Kg, Pb282.1mg / Kg.

[0048] The experimental crops were melon and fruit vegetables (bitter melon).

[0049] Biochar prepared from forestry waste: particle size 1.50-0.01mm, density 0.90g / cm 3 , the maximum water absorption is 389g / Kg, with a very fine honeycomb hollow body.

[0050] 1. The application rate of biochar is 3750kg / ha

[0051] First take by weighing each component that is used for preparing biochar fertilizer, make the mass ratio of biochar and calcium oxide be 30:1, biochar and urea (containing N46%), diammonium phosphate (P 2 o 5 content is 44%), potassium sulfate (K 2 The mass ratio of O content 50%) is 4:1:1:1; first mix the above-mentioned biochar and calcium oxide evenly, then add urea, ...

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Abstract

The invention discloses a biochar fertilizer and a preparation method and an application thereof. Biochar is prepared by carbonization processing of forestry waste, the biochar and calcium oxide are mixed according to a certain proportion, and then according to different heavy metal pollution degrees of soil, the application amount of the biochar is designed; at the same time, according to the amount of nitrogen, phosphorus and potassium fertilizers required for planting different vegetable crops, the biochar is mixed with the nitrogen, phosphorus and potassium fertilizers to prepare the biochar fertilizer adapting to different soils and different vegetables. The biochar fertilizer not only solves the problem of turning the forestry waste into treasure, but also solves the problem of inhibiting agricultural crops from absorbing heavy metals in agricultural production, and has important practical application value. The method provided by the invention is simple and easy to operate, and can be widely used for vegetable agricultural production of the heavy metal polluted soil.

Description

technical field [0001] The invention belongs to the field of fertilizers, and in particular relates to a biochar fertilizer and its preparation method and application. Background technique [0002] Resource and environmental issues are major issues facing contemporary human beings. However, in agricultural and forestry production, a huge amount and a wide variety of solid wastes are produced. At present, agricultural and forestry wastes are mainly disposed of on-site, landfilled and incinerated, which not only takes up valuable land resources, but also causes waste of resources and environmental pollution. The secondary pollution caused by the burning of agricultural and forestry wastes has become an important factor restricting my country's national economy and environmental pollution control. The use of agricultural and forestry wastes to produce biochar to reduce environmental pollution and improve soil fertility has attracted widespread attention. [0003] Soil pollut...

Claims

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Application Information

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IPC IPC(8): C05G3/04A01G1/00C05G3/80
CPCA01G22/00C05B7/00C05D3/02C05G3/80C05D9/00C05C9/00C05D1/02
Inventor 王洪如丁效东张士荣王浩莲
Owner 青岛洪润林业生物质能源有限公司
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