Method for calculating lime application amount in acidified soil

A technology of lime application rate and application rate, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of lack of test conditions and lack of pertinence, and achieve targeted Strong performance, reasonable test indicators, and important application value

Inactive Publication Date: 2013-07-10
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the more accurate method is the experimental method (calcium chloride exchange-neutralization titration method). Due to the lack

Method used

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  • Method for calculating lime application amount in acidified soil
  • Method for calculating lime application amount in acidified soil
  • Method for calculating lime application amount in acidified soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] According to the test results of the acidified soil plow layer soil (the depth of the soil layer is 0-20cm), the soil test indicators are pH, CEC (soil cation exchange capacity), Q Al (soil exchangeable aluminum content) and C OM (Soil organic matter content), the calculation formula is:

[0099] Lime application amount (ton / ha) = ΔpH / (0.764+0.042*[H + ]-0.016*CEC-0.097*Q Al -0.00928*C OM ),

[0100] ΔpH=pH 提高 -pH 基础 ,pH 提高 Indicates the soil pH to be achieved after lime application, pH 基础 Indicates the initial pH value of the acidified soil;

[0101] [H + ]=10 5 / 10 pH基础

[0102] CEC (Cation Exchange Capacity) represents the initial cation exchange capacity of the acidified soil, that is, when the pH value = 7, all the exchangeable cations contained in each kilogram of air-dried soil (K + 、Na + , Ca 2+ , Mg2+ , NH 4 + etc.), the unit is cmol / kg;

[0103] Q Al Indicates the initial exchangeable aluminum content of the acidified soil, that is, the numb...

Embodiment 2

[0110] According to the test results of the acidified soil plow layer soil (the depth of the soil layer is 0-20cm), the soil test indicators are pH, CEC (soil cation exchange capacity), Q Al (soil exchangeable aluminum content) and C OM (Soil organic matter content), the calculation formula is: Lime application amount (ton / ha)=ΔpH / (0.764+0.042*[H + ]-0.016*CEC-0.097*Q Al -0.00928*C OM ),

[0111] ΔpH=pH 提高 -pH 基础 ,pH 提高 Indicates the soil pH to be achieved after lime application, pH 基础 Indicates the initial pH value of the acidified soil;

[0112] [H + ]=10 5 / 10 pH基础

[0113] CEC (Cation Exchange Capacity) represents the initial cation exchange capacity of the acidified soil, that is, when the pH value = 7, all the exchangeable cations contained in each kilogram of air-dried soil (K + 、Na + , Ca 2+ , Mg 2+ , NH 4 + etc.), the unit is cmol / kg;

[0114] Q Al Indicates the initial exchangeable aluminum content of the acidified soil, that is, the number of cent...

Embodiment 3

[0121] According to the test results of the acidified soil plow layer soil (the depth of the soil layer is 0-20cm), the soil test indicators are pH, CEC (soil cation exchange capacity), Q Al (soil exchangeable aluminum content) and C OM (Soil organic matter content), the calculation formula is: Lime application amount (ton / ha)=ΔpH / (0.764+0.042*[H + ]-0.016*CEC-0.097*Q Al -0.00928*C OM ),

[0122] ΔpH=pH 提高 -pH 基础 ,pH 提高 Indicates the soil pH to be achieved after lime application, pH 基础 Indicates the initial pH value of the acidified soil;

[0123] [H + ]=10 5 / 10 pH基础

[0124] CEC (Cation Exchange Capacity) represents the initial cation exchange capacity of the acidified soil, that is, when the pH value = 7, all the exchangeable cations contained in each kilogram of air-dried soil (K + 、Na + , Ca 2+ , Mg 2+ , NH 4 + etc.), the unit is cmol / kg;

[0125] Q Al Indicates the initial exchangeable aluminum content of the acidified soil, that is, the number of cent...

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Abstract

The invention discloses a method for calculating lime application amount in acidified soil. The soil test indexes include pH, cation exchange capacity (CEC), Q<A1> and C<OM> according to an acidified soil plough layer testing result, and a calculation formula is that the lime application amount (tons/hectare) is equal to delta pH/(0.764+0.042*[H+]-0.016*CEC-0.097* Q<A1>-0.00928* C<OM>. The acquisition method of lime powder comprises the steps of: adding a few amount of water into limestone in a room to be naturally aired; screening the lime to be 100-mesh; weighing the screened lime according to the lime using amount calculated by the formula; uniformly spreading the lime on the ground; and fully mixing the lime with plough layer soils. The selected soil is reasonable in test index and high in pertinence; and the lime using amount, required by a certain unit, in the acidified soil can be accurately calculated, and the lime is suitable for non-lime soils and has an important application value.

Description

technical field [0001] The invention relates to a calculation method of lime application amount in acidified soil. Background technique [0002] The amount of lime required to adjust the pH of the acidified soil to the required pH range is called the lime requirement. The amount of lime required is related to soil type, pH, crop type and application purpose. At present, the more accurate method is the experimental method (calcium chloride exchange-neutralization titration method). Due to the lack of test conditions, farmers can only simply estimate the amount of lime according to the soil acidity and soil type, which lacks pertinence. Contents of the invention [0003] The purpose of the present invention is to provide a calculation method of lime application rate in acidified soil. [0004] The method for calculating lime application rate in the acidified soil provided by the invention comprises the steps: [0005] Lime is added to the plow layer of acidified soil to b...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 申建波周海燕张福锁
Owner CHINA AGRI UNIV
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