CN114644932A - Method for controlling effectiveness of soil phosphorus - Google Patents

Abstract

The invention provides a method for controlling the effectiveness of soil phosphorus, which comprises the following components in parts by weight: 25-70 parts of peanut shell, 10-35 parts of ferrous sulfate, 10-15 parts of aluminum chloride, 10-20 parts of agarose and 30-60 parts of modified loofah sponge, and the step 1: crushing peanut shells, soaking in a phosphoric acid solution, filtering, calcining, taking out, soaking in a normal-temperature dilute sulfuric acid solution, adding into a bicarbonate solution, carbonizing, cooling, taking out to obtain a product, and step 2: mixing ferrous sulfate and the modified loofah sponge, adding agarose into the mixture, continuously grinding the mixture to generate a mixture, and the step 3: mixing the mixture with water, stirring, and carrying out step 4: filtering the mixture by using filter paper, drying the filtered mixture, and performing step 5: the dried mixture is placed in a stirring container to be slowly stirred, the product is added while stirring, and the prepared solution can control the content of phosphorus in soil, reduce the discharge amount of the phosphorus to a water body and control the effectiveness of the phosphorus in the soil.

Description

Method for controlling effectiveness of soil phosphorus

Technical Field

The invention relates to the technical field of soil improvement, in particular to a method for controlling the effectiveness of soil phosphorus.

Background

The average content of phosphorus in the crust is about 0.28 percent (calculated by phosphorus pentoxide), the phosphorus content (0-20 cm surface soil) of most of the soil in China varies from 0.04 percent to 0.25 percent, and the variation of different soil types is large. From the general view, the phosphorus content of the soil from north to south or from west to east in China is in a descending trend, the brick red soil in south China has the lowest sulfur content, the black soil in north China and the chestnut calcium soil in inner Mongolia have the highest phosphorus content, the red soil and yellow soil in China and the brown soil and brown soil in north China are between the two, and the sulfur content of the natural soil depends on various factors such as soil matrix type, organic matter content, terrain position, soil acidity and alkalinity, upper layer arrangement position in a section plane and the like, at present, the agricultural non-point source pollution becomes one of the most troublesome problems for world environmental protection scholars and managers, wherein the input of excessive N, P substances is one of the main reasons for forming the agricultural non-point source pollution;

the main sources of agricultural non-point source pollution caused by N.P nutrient are divided into two sources, namely, the soil contains N, P and other nutrient substances, and the excessive fertilizer and pesticide are input into an agricultural ecological system due to large population pressure, so that a large amount of N, P is accumulated in the soil, under the dissolving and washing of runoff, the nutrients of the soil containing N, P nutrient are lost, especially the nutrients such as N, P and the like in slope cultivated land covered by vegetation are easily eluted by the runoff and carried into a receiving water body, and in addition, the development of rural economy, the livestock and poultry breeding sewage containing N, P substances and a large amount of domestic garbage are discharged into a water source, so that the surface and underground water pollution is caused, the water body is eutrophicated, and even ecological disasters such as harmful algae water bloom and the like are caused.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a method for controlling the effectiveness of soil phosphorus, which solves the problems that plants in soil are difficult to absorb effective phosphorus and natural disasters are caused by the loss of the effective phosphorus in the soil.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a method for controlling the effectiveness of soil phosphorus comprises the following components in parts by weight: 25-70 parts of peanut shell, 10-35 parts of ferrous sulfate, 10-15 parts of aluminum chloride, 10-20 parts of agarose and 30-60 parts of modified loofah sponge, and the preparation method comprises the following steps:

step 1: crushing peanut shells, soaking the obtained powder particles in a phosphoric acid solution at the temperature of 80 ℃ for 20-36 h, filtering, carbonizing for 3h at the temperature of 700 ℃, taking out to obtain carbonized peanut shells, soaking in a normal-temperature dilute sulfuric acid solution for 36h, adding into a bicarbonate solution, heating for 8h in an oxygen-free environment at the temperature of 500 ℃, cooling, taking out, and crushing to obtain a product;

and 2, step: mixing ferrous sulfate and modified retinervus Luffae fructus in oxygen-free environment, grinding in a container for 10min, adding agarose, and grinding for 30min to obtain a mixture;

and step 3: mixing the mixture with water according to a ratio of 1: 3, stirring for 30min, and standing for 24-30 h after stirring;

and 4, step 4: filtering the placed mixture by using filter paper, and then placing the filtered mixture in a drying box at 70 ℃ for drying for 2 hours;

and 5: placing the dried mixture in a stirring container, slowly stirring, and adding the resultant while stirring;

step 6: and adding aluminum chloride into the mixture and stirring until the mixture is completely and uniformly stirred.

Preferably, the agarose is conventional agarose.

Preferably, the phosphoric acid solution has a phosphoric acid mass concentration of 70% and the bicarbonate solution has a bicarbonate concentration of 35%.

A material produced by a method based on controlling the effectiveness of soil phosphorus.

(III) advantageous effects

The invention provides a method for controlling the effectiveness of soil phosphorus, which has the following beneficial effects:

1. according to the invention, the solution prepared by the preparation process can control the content of phosphorus in soil, greatly reduce the discharge of phosphorus to water and control the effectiveness of phosphorus in soil.

2. According to the invention, the prepared solution can greatly reduce the cost of soil fertilization, and is beneficial to controlling the cost.

3. The improved liquid prepared by the method has high efficiency and good reaction effect, and can quickly react with phosphorus in soil, so that the high efficiency of the improved liquid is greatly improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

the embodiment of the invention provides a method for controlling the effectiveness of soil phosphorus, which comprises the following components in parts by weight: 30 parts of peanut shell, 12 parts of ferrous sulfate, 12 parts of aluminum chloride, 10 parts of agarose and 35 parts of modified loofah sponge, and the preparation method comprises the following steps:

step 1: crushing peanut shells, soaking the obtained particles in a phosphoric acid solution at the temperature of 80 ℃ for 20-36 h, filtering, carbonizing for 3h at the temperature of 700 ℃, taking out to obtain carbonized peanut shells, soaking in a normal-temperature dilute sulfuric acid solution for 36h, adding into a bicarbonate solution, heating for 8h in an oxygen-free environment at the temperature of 500 ℃, cooling, taking out, and crushing to obtain a product, wherein multiple products taking the peanut shells as raw materials have rich fine pores, and have good air permeability and water permeability effects, and the air permeability and the water permeability in soil can be greatly increased when the peanut shells are used;

step 2: mixing ferrous sulfate and modified loofah sponge in an oxygen-free environment, grinding for 10min in a container, adding agarose into the container, and continuously grinding for 30min to generate a mixture, wherein the ferrous sulfate contains iron elements, and is frequently used in agricultural production and flower and grass cultivation, so that the ferrous sulfate can prevent yellow diseases of flowers and grass caused by iron deficiency and can acidify alkaline soil, and the purpose of locking phosphorus in the soil is achieved;

and step 3: mixing the mixture with water according to a ratio of 1: 3, stirring for 30min, and standing for 24-30 h after stirring;

and 4, step 4: filtering the placed mixture by using filter paper, and then placing the filtered mixture in a drying box at 70 ℃ for drying for 2 hours;

and 5: placing the dried mixture in a stirring container, slowly stirring, and adding the resultant while stirring;

step 6: and adding aluminum chloride into the mixture, and stirring until the mixture is thoroughly and uniformly stirred, wherein the prepared solution can increase and control the phosphorus in the soil, greatly increase the absorption of the plants in the soil to the phosphorus, and effectively prevent natural harm caused by the loss of the phosphorus in the soil.

The agarose is conventional agarose.

The phosphoric acid solution had a phosphoric acid mass concentration of 70% and the bicarbonate solution had a bicarbonate concentration of 35%.

Example two:

a method for controlling the effectiveness of soil phosphorus comprises the following components in parts by weight: 40 parts of peanut shell, 15 parts of ferrous sulfate, 13 parts of aluminum chloride, 15 parts of agarose and 45 parts of modified loofah sponge, and the preparation method comprises the following steps:

step 1, crushing peanut shells, soaking the obtained powder particles in a phosphoric acid solution at the temperature of 80 ℃ for 20-36 h, filtering, carbonizing for 3h at the temperature of 700 ℃, taking out to obtain carbonized peanut shells, soaking in a dilute sulfuric acid solution at normal temperature for 36h, adding into a bicarbonate solution, then heating for 8h in an oxygen-free environment at the temperature of 500 ℃, cooling, taking out, and crushing to obtain a product;

step 2: mixing ferrous sulfate and modified retinervus Luffae fructus in oxygen-free environment, grinding in a container for 10min, adding agarose, and grinding for 30min to obtain a mixture;

and step 3: mixing the mixture with water according to a ratio of 1: 3, stirring for 30min, and standing for 24-30 h after stirring;

and 4, step 4: filtering the placed mixture by using filter paper, and then placing the filtered mixture in a drying box at 70 ℃ for drying for 2 hours;

and 5: placing the dried mixture in a stirring container, slowly stirring, and adding the resultant while stirring;

step 6: and adding aluminum chloride into the mixture and stirring until the mixture is completely and uniformly stirred.

The agarose is conventional agarose.

The phosphoric acid solution had a phosphoric acid mass concentration of 70% and the bicarbonate solution had a bicarbonate concentration of 35%.

Example three:

a method for controlling the effectiveness of soil phosphorus comprises the following components in parts by weight: 55 parts of peanut shell, 35 parts of ferrous sulfate, 15 parts of aluminum chloride, 20 parts of agarose and 55 parts of modified loofah sponge, and the preparation method comprises the following steps:

step 1: crushing peanut shells, soaking the obtained powder particles in a phosphoric acid solution at the temperature of 80 ℃ for 20-36 h, filtering, carbonizing for 3h at the temperature of 700 ℃, taking out to obtain carbonized peanut shells, soaking in a normal-temperature dilute sulfuric acid solution for 36h, adding into a bicarbonate solution, heating for 8h in an oxygen-free environment at the temperature of 500 ℃, cooling, taking out, and crushing to obtain a product;

step 2: mixing ferrous sulfate and modified retinervus Luffae fructus in oxygen-free environment, grinding in a container for 10min, adding agarose, and grinding for 30min to obtain a mixture;

and step 3: mixing the mixture with water according to a ratio of 1: 3, stirring for 30min, and standing for 24-30 h after stirring;

and 4, step 4: filtering the placed mixture by using filter paper, and then placing the filtered mixture in a drying box at 70 ℃ for drying for 2 hours;

and 5: placing the dried mixture in a stirring container, slowly stirring, and adding the resultant while stirring;

step 6: and adding aluminum chloride into the mixture and stirring until the mixture is completely and uniformly stirred.

The agarose is conventional agarose.

The phosphoric acid solution had a phosphoric acid mass concentration of 70% and the bicarbonate solution had a bicarbonate concentration of 35%.

Example four:

the new solutions prepared according to examples 1 to 3 were reacted with soil, plants were planted in the experimental soil, and comparative groups were set up as follows:

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. A method for controlling the phosphorus effectiveness of soil comprises the following components in parts by weight: 25-70 parts of peanut shell, 10-35 parts of ferrous sulfate, 10-15 parts of aluminum chloride, 10-20 parts of agarose and 30-60 parts of modified loofah sponge, and the preparation method comprises the following steps:

step 1: crushing peanut shells, soaking the obtained powder particles in a phosphoric acid solution at the temperature of 80 ℃ for 20-36 h, filtering, carbonizing for 3h at the temperature of 700 ℃, taking out to obtain carbonized peanut shells, soaking in a normal-temperature dilute sulfuric acid solution for 36h, adding into a bicarbonate solution, heating for 8h in an oxygen-free environment at the temperature of 500 ℃, cooling, taking out, and crushing to obtain a product;

step 2: mixing ferrous sulfate and modified retinervus Luffae fructus in oxygen-free environment, grinding in a container for 10min, adding agarose, and grinding for 30min to obtain a mixture;

and step 3: mixing the mixture with water according to a ratio of 1: 3, stirring for 30min, and standing for 24-30 h after stirring;

and 4, step 4: filtering the placed mixture by using filter paper, and then placing the filtered mixture in a drying box at 70 ℃ for drying for 2 hours;

and 5: placing the dried mixture in a stirring container, slowly stirring, and adding the resultant while stirring;

step 6: and adding aluminum chloride into the mixture and stirring until the mixture is completely and uniformly stirred.

2. The method of claim 1, wherein the method further comprises the step of: the agarose is conventional agarose.

3. The method of claim 1, wherein the method further comprises the step of: the phosphoric acid solution contains 70% by mass of phosphoric acid and 35% by mass of bicarbonate.