Method for determining lime application amount in acidified soil remediation

A lime application rate and soil remediation technology, applied in the agricultural field, can solve the problems of soil pH drop, low lime application rate, and failure to consider soil self-regulation ability, etc., to overcome difficulties in purchasing instruments and medicines, important application value, testing The effect of low instrument cost

Inactive Publication Date: 2018-10-16
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

Relevant studies have shown that after lime application, the soil pH increases rapidly, but after 30 days, due to the self-regulation ability of the soil to acidity, the soil pH will drop and eventually stabilize. However, the above method does not take into account the self-regulation of soil acidity Regulating ability, will lead to less actual lime application

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  • Method for determining lime application amount in acidified soil remediation
  • Method for determining lime application amount in acidified soil remediation

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The soil was from Baojing County, Xiangxi Prefecture, and the soil pH background value was 4.92. Weigh 10 parts of the acid soil to be improved by weight of 1 kg, add 0.3, 0.6, 0.9, 1.2, 1.5, 1.8, 2.1, 2.4, 2.7, 3.0g lime to each part of the soil, and the lime and the soil are fully mixed. Evenly, then put them into plastic cups separately to keep the soil moist. After 30d, 40d, and 50d, the soil pH in each plastic cup was measured, and the average values ​​were 5.33, 5.65, 5.85, 5.99, 6.35, 6.62, 6.73, 6.81, 7.22, and 7.46, respectively.

[0031] The average value of soil pH in each plastic cup was subtracted from the soil pH background value of 4.92, and the difference was the soil pH increment after lime application, which were 0.41, 0.73, 0.93, 1.07, 1.43, 1.70, 1.81, 1.89, and 2.30, respectively. , 2.54. A scatter plot was made of soil pH increment and lime usage, and then a linear trend line and its formula were added. The results are shown in figure 1 .

[00...

Embodiment 2

[0041] The soil was from Huayuan County, Xiangxi Prefecture, and the soil pH background value was 4.76. Weigh 10 parts of the acid soil to be improved by weight of 1 kg, add 0.3, 0.6, 0.9, 1.2, 1.5, 1.8, 2.1, 2.4, 2.7, 3.0g lime to each part of the soil, and the lime and the soil are fully mixed. Evenly, then put them into plastic cups separately to keep the soil moist. After 30d, 40d, and 50d, the soil pH in each plastic cup was measured, and the average values ​​were 4.97, 5.07, 5.62, 5.77, 6.09, 6.26, 6.22, 6.56, and 6.40, respectively.

[0042]The average soil pH in each plastic cup was subtracted from the soil pH background value of 4.76, and the difference was the soil pH increment after lime application, which were 0.21, 0.31, 0.86, 1.01, 1.33, 1.50, 1.46, 1.80, and 1.64, respectively. . A scatter plot was made of soil pH increment and lime usage, and then a linear trend line and its formula were added. The results are shown in figure 2 .

[0043] Its lime consumpt...

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Abstract

The invention belongs to the technical field of agriculture, and particularly relates to a method for determining the lime application amount in acidified soil remediation. The method includes determination of soil pH increment, lime treatment of soil to be improved, determination of soil pH increment after application of different limes in the soil to be improved, lime application amount model building and determination of the lime application amount in a large field. The method only selects the soil pH as a test index, is simple and easy to implement, and overcomes the defect that an estimation method is not accurate, and more importantly considers buffer characteristics of different soils and the characteristic of large soil pH change after lime application. By means of the method, theamount of lime needed to improve the acidified soil by certain unit can be accurately calculated. The method is suitable for various types of soil and has important application value.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for determining the amount of lime applied in acidified soil remediation. Background technique [0002] The increasingly serious soil acidification leads to the reduction of crop yield and the decline of crop planting efficiency, which seriously restricts the sustainable development of agricultural production. The remediation of soil acidification is to increase soil pH and adjust the pH of acidified soil to the pH range required by crops. The application of lime has a significant effect on improving acidic soil, and it is also the most economical, convenient and ancient improvement measure. The determination of the appropriate application amount of lime is the key to determine whether this measure is effective and whether it can be popularized and applied. The amount of lime applied is related to soil type, soil pH, crop species and application purpose....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/02
CPCG06Q50/02G06F30/20
Inventor 邓小华陈金李玉辉田峰
Owner HUNAN AGRICULTURAL UNIV
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