Method for predicting soda salinization and alkalization indexes through soil pH

A soil and soda technology, applied in the field of predicting the chemical indicators of soda salt and alkali, can solve the problems of a lot of manpower and material resources and a long period of chemical indicators measurement, and achieve the effect of scientifically accurate prediction data, saving measurement time and human and material resources.

Active Publication Date: 2021-08-24
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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Problems solved by technology

[0003] In order to solve the problem that the existing chemical index measurement cycle of obtaining soda saline-alkali soil is long and requires a lot o

Method used

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  • Method for predicting soda salinization and alkalization indexes through soil pH
  • Method for predicting soda salinization and alkalization indexes through soil pH
  • Method for predicting soda salinization and alkalization indexes through soil pH

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specific Embodiment approach 1

[0029] Specific embodiment one: the present embodiment utilizes soil pH to predict the method for soda saline-alkali chemical index to carry out according to the following steps:

[0030] 1. Take soda saline-alkali soil and measure the soil pH;

[0031] Two, according to following regression prediction equation, finished the prediction to soda salinity chemical index, namely:

[0032] 1. Soil pH and soluble K + The content regression prediction equation is: Y=4.376E-11x 9.998 (R 2 =0.468**)

[0033] 2. Soil pH and soluble Na + The content regression prediction equation is: Y=8.876E-13x 13.764 (R 2 =0.770**)

[0034] 3. Soil pH and soluble Ca 2+ The content regression prediction equation is: Y=8.665E-19x 19.183 (R 2 =0.635**);

[0035] 4. Soil pH and soluble Mg 2+ The content regression prediction equation is: Y=1.099E-7e 1.722x (R 2 =0.665**)

[0036] 5. Soil pH and soluble CO 3 2- The content regression prediction equation is: Y=1.861x 2 -32.126x+138.41(R 2...

Embodiment 12019

[0055] Example 1 In 2019, the method of the present invention was used to predict the chemical indicators of soda saline soil in the soda saline soil of the Daan alkaline land ecological experiment station of the Chinese Academy of Sciences

[0056] The method of utilizing soil pH to predict the chemical index of soda salinity is carried out according to the following steps:

[0057] 1. Take soda saline-alkali soil and measure the soil pH;

[0058] Two, according to following regression prediction equation, finished the prediction to soda salinity chemical index, namely:

[0059] 1. Soil pH and soluble K + The content regression prediction equation is: Y=4.376E-11x 9.998 (R 2 =0.468**)

[0060] 2. Soil pH and soluble Na + The content regression prediction equation is: Y=8.876E-13x 13.764 (R 2 =0.770**)

[0061] 3. Soil pH and soluble Ca 2+ The content regression prediction equation is: Y=8.665E-19x 19.183 (R 2 =0.635**);

[0062] 4. Soil pH and soluble Mg 2+ The c...

Embodiment 22019

[0082] Example 2 Prediction of soluble Na in soda saline-alkali soil at the Da'an Alkali Land Ecological Experiment Station of the Chinese Academy of Sciences in 2019 + ion content

[0083] Sampling of soda saline-alkali soil in Da'an Alkaline Land Experimental Station of Science and Technology of China. After the soil sample is air-dried, it is mixed with a soil-water ratio of 1:5, stirred for 30 minutes, and settled for at least 3 hours. It is obtained after high-speed centrifugation in a centrifuge. Extraction solution. The pH of the extract was measured by a PHS-3C digital pH meter, and the soluble Na was measured by an inductively coupled plasma emission spectrometer (ICPS-7500, Shimadzu Company, Japan). + ion content.

[0084] Use based on soil pH and soluble Na + Content regression prediction equation Y=8.876E-13x 13.764 , for soluble Na + content is predicted. For example: the soil pH is 9.95, 9.89, 9.52, 9.48 and 9.57 respectively, then according to the regressi...

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Abstract

The invention relates to a method for predicting soda salinization and alkalization indexes, in particular to a method for predicting soda salinization and alkalization indexes through soil pH. The method solves the problems that the existing determination period for obtaining the chemical indexes of the soda saline-alkali soil is long, and a large amount of manpower and material resources are needed for support. The method comprises the following steps: 1, measuring soil pH; and 2, predicting according to a regression prediction equation. The method is scientific and accurate in prediction data, saves a large amount of soda saline alkali soil chemical index determination time and manpower and material resources, and is a high-throughput prediction method for soda saline alkali soil chemical indexes.

Description

technical field [0001] The invention relates to a method for predicting the chemical index of soda saline. Background technique [0002] Saline-alkali soil spreads over more than 100 countries, with a total area of ​​more than 900 million hectares, accounting for about a quarter of the world's total land area, posing a severe challenge to the sustainable development of agriculture. The Songnen Plain is one of the largest alkaline soil areas in the world, with more than 3.73 million hectares in an alkaline state. Even more shocking is that about 20.0×10 3 hectares of land are newly salinized and / or alkalized, posing a serious threat to crop production. Compared with the neutral sodium chloride coastal saline-alkali land, the physical and chemical properties of soda saline-alkali soil are extremely bad, with high alkalinity (pH>8.5, ESP>50%), extremely poor soil structure and compacted soil characteristics, from ecological and From an economic point of view, the devel...

Claims

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Application Information

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IPC IPC(8): G16C20/30G16C20/70G01N21/73
CPCG16C20/30G16C20/70G01N21/73
Inventor 刘淼梁正伟王明明杨昊谕靳洋洋冯钟慧魏天娇陆冠茹
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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