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Method for acquiring missing data of initial pH value of soil

A soil and soil acidification technology, applied in soil material testing, measuring devices, instruments, etc., can solve problems such as the inability to calculate the soil acidification rate, the inability to estimate the soil acidification rate, forecast and early warning of acidification trends, etc.

Inactive Publication Date: 2017-10-03
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is no way to know the soil pH 初始 , it will lead to the inability to calculate the soil acidification rate, so that it is impossible to realize the prediction and early warning of the soil acidification rate estimation and acidification trend in a certain period of time

Method used

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  • Method for acquiring missing data of initial pH value of soil
  • Method for acquiring missing data of initial pH value of soil
  • Method for acquiring missing data of initial pH value of soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, pH 初始 The method of obtaining

[0060] 1. Using pH 无人为干扰 as pH 初始

[0061] Statistics were made on the chronological trend of pH changes in two typical soils in my country: neutral soil (brown soil) and acidic soil (red soil). The collection sites were mainly distributed in Laizhou City, Zhaoyuan City, Longkou City, Penglai City, Laiyang City and Muping District, as well as Qiyang City in Hunan Province, also collected undisturbed soil for testing. The results are shown in Table 1.

[0062] Table 1 Variation trend of soil surface pH in different years

[0063]

[0064] Note: The number of samples of brown soil farmland is n=115, the number of samples of undisturbed soil is n=6, and the sampling points are distributed in 6 counties and urban areas; the number of samples of red soil farmland is n=128 (the number of samples in 1990 and n=6), the number of soil samples without human disturbance is n=5, and the sampling points are distributed in one cou...

Embodiment 2

[0074] Embodiment 2, method verification

[0075] 1. Experiment 1

[0076] The calculation method of soil acidification rate was validated and analyzed by the long-term location test of dryland red soil (Quaternary red soil). The experiment was a two-cropping system in one year, using wheat-corn crop rotation, using urea (N 46%) as nitrogen fertilizer, and superphosphate (P 2 o 5 12.5%), potassium chloride (K 2 O 60%). All fertilizers are applied at one time when wheat and corn are sown. Divided into the following two groups:

[0077] Nitrogen fertilization group: 210kgN / hm of nitrogen fertilizer applied to corn 2 / y; wheat application of nitrogen fertilizer 90kgN / hm 2 / y.

[0078] NPK application group: 210kgN / hm of nitrogen fertilizer applied to corn 2 / y, phosphate fertilizer 84kgP 2 o 5 / hm 2 / y, potash fertilizer 84kgK 2 O / hm 2 / y; wheat application of nitrogen fertilizer 90kgN / hm 2 / y, phosphate fertilizer 36kgP 2 o 5 / hm 2 / y, potash fertilizer 36kgK ...

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Abstract

The invention discloses a method for acquiring missing data of the initial pH value of soil. The method provided by the invention comprises the following steps: (1) measuring the current pH value and buffer capacity of to-be-detected soil, soil bulk density and the volume of a plough layer; (2) acquiring the pH<0> value of the to-be-detected soil; and (3) carrying out calculation according to the equation that a soil acidification rate in N years is equal to a product of the buffer capacity, the soil bulk density, the volume of the plough layer and the different between the pH<0> value and the current pH value, wherein the pH<0> value is the pH value of reference soil, and the reference soil is soil without human disturbance, i.e., soil meeting the following three conditions at the same time: (a1) the soil is within the coverage of a circle with the to-be-detected soil as a center and with a radius of 500 m; (a2) the parent materials, soil types and soil species of the soil and the to-be-detected soil are identical; and (3) the soil is free of human disturbance and fertilization, and no plant grows on the surface of the soil. The method provided by the invention has important application value in quantitative analysis of soil acidification rate and prediction and early warning of acidification.

Description

technical field [0001] The invention relates to a method for acquiring missing soil initial pH data. Background technique [0002] Soil initial pH is a very important parameter in the study of soil acidification, and it is a reference to measure whether the soil is acidified or the degree of acidification. For example, by comparing the initial pH of the soil with the current pH, it is possible to determine whether a certain field or area is acidified or the difference in the degree of acidification, and then calculate the rate of soil acidification. [0003] Soil acidification rate refers to the pH change per unit time caused by the unit volume of soil H + increase. [0004] Soil acidification rate (AR) = (pH 初始 -pH 现在 )×(pHBC×BD×V) / T; [0005] Among them, pH 初始 Indicates the initial pH value of the soil under study; [0006] pH 现在 Indicates the current pH value of the soil under study; [0007] pHBC represents the buffer capacity of the soil, that is, the amount of...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N27/00
CPCG01N27/00G01N33/24G01N33/245
Inventor 徐明岗周海燕周世伟王伯仁
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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