Method for evaluating soil fertility of purple paddy soil

A technology of soil fertility and evaluation method, which is applied in the direction of soil material testing, measuring devices, instruments, etc., can solve the problems of low actual productivity, difficulty in fully characterizing soil fertility status, and high soil fertility index, so as to achieve comprehensive selection and accurate and reliable evaluation results Effect

Inactive Publication Date: 2019-02-19
INST OF SOIL FERTILIZER SICHUAN ACAD OF AGRI SCI +1
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AI Technical Summary

Problems solved by technology

The change of soil single nutrient or fertility index can reflect the change characteristics of soil fertility from a certain angle, but it is often difficult to fully characterize the status of soil fertility; domestic and foreign scholars have proposed expert scoring method, Fuzzy comprehensive evaluation method, soil quality dynamic method, Nemerow method, etc. Various soil fertility evaluation methods such as index method and principal component-cluster analysis method
The advantage of these methods is that they can play an important role in the quantitative evaluation of soil fertility; however, the above evaluation methods basically do not directly include crop yields in evaluation indicators, and in actual production, due to the influence of factors such as fertilization, cultivation and management measures, In the evaluation, there will be a contradictory phenomenon that the soil fertility index is higher and the actual productivity is lower

Method used

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  • Method for evaluating soil fertility of purple paddy soil
  • Method for evaluating soil fertility of purple paddy soil
  • Method for evaluating soil fertility of purple paddy soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] A method for evaluating soil fertility in a purple soil paddy field, comprising the steps of:

[0033] 1. Selection of evaluation indicators

[0034] Soil quality indicators refer to the properties, functions or conditions for monitoring and evaluating soil health from the perspective of soil production potential and environmental management. The selection of evaluation indicators should follow the following principles: (1) the principle of combining comprehensive analysis with dominant factors; (2) the principle of stability, that is, first select the stable factors that often affect soil productivity; (3) consider the scientific status, status and completeness, and current technical conditions. The present invention selects bulk density (BD), pH, organic matter (SOM), total nitrogen (TN), total phosphorus (TP), total potassium (TK), alkaline nitrogen (AN) and available phosphorus (AP) related to soil productivity. , available potassium (AK), cation exchange capacity...

experiment example

[0063] 1. Selection of evaluation indicators

[0064] In 2017, experiments were carried out in Baili Village, Guanghan City, Sichuan Province. Field 1, Field 2, Field 3 and Field 4 were selected to collect mixed soil samples of different fields (0-20cm) and soil bulk density (BD ) and rice yield, samples were brought back to the laboratory, and indoor analysis was carried out for soil pH, organic matter (SOM), total nitrogen (TN), total phosphorus (TP), total potassium (TK), alkaline nitrogen (AN), available phosphorus (AP ), available potassium (AK), microbial biomass carbon (MBC), and microbial biomass nitrogen (MBN).

[0065] 2. Determination of membership degree

[0066] According to the corresponding membership degree function formulas (1), (2) or (3), and the value of the turning point (Table 1), the membership degree values ​​of various soil indicators in different fields can be calculated, and the results are shown in Table 4.

[0067] Table 4 Membership degree of va...

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Abstract

The invention belongs to the technical field of soil fertility evaluation, and discloses a method for evaluating the soil fertility of a purple paddy soil, comprising the following steps: S1) obtaining the value of each soil index in the soil fertility index, and the value of each soil index in the soil fertility index is obtained, and respectively calculating the membership value and the weight coefficient of each soil index according to the value of each soil index; and S2) calculating the comprehensive index value of the soil fertility used for evaluating the soil fertility according to themembership value and the weight coefficient of each soil index. The soil fertility index is composed of soil indexes as follows: bulk density, ph, organic matter, total nitrogen, total phosphorus, total potassium, alkali-hydrolyzable nitrogen, available phosphorus, available potassium, cation exchange capacity, microbial biomass carbon, microbial biomass nitrogen and relative yield. The method for evaluating the soil fertility of a purple paddy soil has the characteristics of comprehensive and reasonable selection of soil evaluation indexes, and realizes comprehensive evaluation of the soil fertility and the productivity.

Description

technical field [0001] The invention belongs to the technical field of soil fertility evaluation, and in particular relates to a method for evaluating soil fertility of a purple soil paddy field. Background technique [0002] Purple soil is a unique land resource in my country. It is widely distributed in Sichuan, Chongqing, Yunnan, Guizhou and other provinces in China. These areas are also the paddy and dry rotation areas in the upper reaches of the Yangtze River in my country, that is, rice-wheat or rice-rape rotation areas. food security is of paramount importance. Paddy soil fertility is the basic resource for the sustainable development of rice production, and it is also an important factor affecting rice yield. How to choose reasonable evaluation methods and indicators to scientifically evaluate paddy soil fertility is particularly important to provide theoretical guidance for sustainable production and management of paddy fields. At present, soil fertility evaluation...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24G01N33/245
Inventor 樊红柱徐明岗张会民陈琨蒋松
Owner INST OF SOIL FERTILIZER SICHUAN ACAD OF AGRI SCI
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