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A improver for effectively improving zinc deficiency symptoms of oasis salinized fluvo-aquic soil corn and its preparation method

A technology of improving agent and corn, applied in chemical instruments and methods, organic fertilizers, soil conditioning materials, etc., can solve the problems of low effective zinc content, high soil salinity, reducing soil salinity and pH value, etc. The effect of improving soil structure, simple preparation process and lowering pH value

Active Publication Date: 2022-05-27
INST OF SOIL FERTILIZER & WATER SAVING AGRI GANSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly aims at the problems of high soil salinity, low effective zinc content and common zinc deficiency symptoms in oasis salinized fluvo-aquic soil, and fully utilizes the abundant corn straw resources in this area to provide a method that can reduce soil salinity. and pH value, and can improve the soil zinc deficiency, and improve the corn zinc deficiency symptoms

Method used

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  • A improver for effectively improving zinc deficiency symptoms of oasis salinized fluvo-aquic soil corn and its preparation method
  • A improver for effectively improving zinc deficiency symptoms of oasis salinized fluvo-aquic soil corn and its preparation method
  • A improver for effectively improving zinc deficiency symptoms of oasis salinized fluvo-aquic soil corn and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation method of a kind of improver that effectively improves the zinc deficiency symptom of oasis salinized fluvo-aquic soil corn of the present invention is as follows:

[0055] (1) Preparation of biochar

[0056] Pulverize and sieve the air-dried corn stalks, the sieved particle diameter is less than or equal to 15mm, and place the sieved corn stalk powder in a tubular carbonization furnace for pyrolysis under anoxic conditions. The pyrolysis temperature is 300 °C, and the temperature is raised from room temperature. The heating rate to the pyrolysis temperature was 5°C / min, the pyrolysis time was 4h, and then the temperature was raised to 650°C, the pyrolyzed biochar was activated with water vapor for 30 minutes, and the biochar was naturally cooled to room temperature. 27.3%.

[0057] (2) Biochar modification

[0058] 4 parts by weight of 65wt% concentrated HNO 3 Add 10 parts by weight of purified water to obtain 30 wt% HNO 3 solution, soaking the bioc...

Embodiment 2

[0063] The preparation method of a kind of improver that effectively improves the zinc deficiency symptom of oasis salinized fluvo-aquic soil corn of the present invention is as follows:

[0064] (1) Preparation of biochar

[0065] Pulverize and sieve the air-dried corn stalks, the diameter of the sieved particles is ≤15mm, and place the sieved corn stalk powder in a tubular carbonization furnace for pyrolysis under anoxic conditions. The pyrolysis temperature is 200 °C, and the temperature is raised from room temperature. The heating rate to the pyrolysis temperature was 5°C / min, the pyrolysis time was 12h, then the temperature was raised to 650°C, the pyrolyzed biochar was activated with water vapor for 30min, and the biochar was naturally cooled to room temperature. The yield was 62.4%.

[0066] (2) Biochar modification

[0067] Soak the biochar obtained in step (1) in 50wt% HNO 3 The solution was refluxed in a water bath at 75°C for 2 hours, filtered and then dried at a...

Embodiment 3

[0072] The preparation method of a kind of improver that effectively improves the zinc deficiency symptom of oasis salinized fluvo-aquic soil corn of the present invention is as follows:

[0073] (1) Preparation of biochar

[0074] Pulverize and sieve the air-dried corn stalks, the sieved particle diameter is less than or equal to 15mm, and place the sieved corn stalk powder in a tubular carbonization furnace for pyrolysis under anoxic conditions. The pyrolysis temperature is 400 °C, and the temperature is raised from room temperature. The heating rate to the pyrolysis temperature is 5°C / min, the pyrolysis time is 2h, then the temperature is raised to 650°C, the pyrolyzed biochar is activated with water vapor for 30min, and the biochar is naturally cooled to room temperature. 14.5%.

[0075] (2) Biochar modification

[0076] Soak the biochar obtained in step (1) in 10wt% HNO 3 The solution was refluxed in a water bath at 75°C for 2 hours, filtered and then dried at a consta...

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Abstract

The invention provides a preparation method of an improver for effectively improving the zinc deficiency symptoms of maize in oasis salinized fluvo-aquic soil, which is to prepare biochar with corn stalks, and then use HNO 3 Modification of biochar, final loading of ZnSO 4 prepared. The invention also provides the improver prepared by applying the method. The present invention uses corn stalks to prepare biochar, which is rich in raw material resources and simple and easy to operate, and uses HNO 3 Modification increases the acidic carboxyl functional groups on the surface of biochar and enhances the Zn 2+ The holding capacity of the product reduces the pH value of the product, and the surface is sprayed with ZnSO 4 solution makes the modified biochar load a large amount of Zn 2+ After being applied to the soil, it can effectively reduce the salt content of the soil in the root zone of crops, adjust the pH value of the soil, increase the permeability of the soil, improve the performance of soil water and fertilizer retention, significantly improve the zinc deficiency of corn, and reduce the zinc deficiency rate of corn by more than 15%.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and in particular relates to an improver for effectively improving zinc deficiency symptoms of oasis salinized fluvo-aquic soil corn and a preparation method thereof. Background technique [0002] Zinc is an essential nutrient element for plants, and the zinc required by plants mainly comes from the soil. There are a wide range of zinc-deficient soils in the world. There are 2 million hectares of zinc-deficient rice fields in Asia, and 40% of zinc-deficient soils in my country are mainly distributed in calcareous soils in the north. Oasis salinized fluvo-aquic soil is also one of the typical areas. Our research shows that there are two reasons for the lack of zinc in maize on the oasis salinized fluvo-aquic soil. One is that salt ionomers are involved in the transformation of different forms of zinc, resulting in a significant reduction in the active zinc content in the soil and the rapi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/02C09K17/04C05G3/80C09K101/00
CPCC05C11/00C09K17/04C09K17/02C09K2101/00
Inventor 王成宝霍琳杨思存温美娟王建成姜万礼黄涛李伟绮
Owner INST OF SOIL FERTILIZER & WATER SAVING AGRI GANSU ACAD OF AGRI SCI