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Models for assessing different degrees of degradation of meadows and grasslands and their establishment methods and applications

A technology of degradation degree and meadow, which is applied in the field of evaluating different degradation degree models of meadow grassland and its establishment, so as to achieve the effect of promoting grassland animal husbandry production and environmental protection

Active Publication Date: 2021-10-08
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of comprehensive, simple and practical diagnostic methods for the degradation degree of grassland systems

Method used

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  • Models for assessing different degrees of degradation of meadows and grasslands and their establishment methods and applications
  • Models for assessing different degrees of degradation of meadows and grasslands and their establishment methods and applications
  • Models for assessing different degrees of degradation of meadows and grasslands and their establishment methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Embodiment 1, grazing intensity causes the impact of different degradation degrees on meadow grassland

[0082] Experimental design: The natural grassland with the community type of Leymus chinensis + forb community was used as the grazing sample plot, and a total of 6 levels of grazing intensity gradient treatments were set up, and the stocking rates were: G 0.00 :0.00Au / hm 2 , G 0.23 :0.23Au / hm 2 , G 0.34 :0.34Au / hm 2 , G 0.46 :0.46Au / hm 2 , G 0.69 :0.69Au / hm 2 , G 0.92 :0.92Au / hm 2 .

[0083] After ten years (2009-2018) of grazing experiments, with the continuation of grazing time, different grazing intensities have gradually produced significant changes in the characteristics of vegetation communities and soil characteristics, resulting in a series of obvious mildly degraded, moderately degraded and severely degraded areas . The specific data are as follows:

[0084] 1. Changes in community characteristics after continuous control of grazing intensity f...

Embodiment 2

[0096] Embodiment 2. Establishing a model for assessing different degrees of degradation of meadow grassland

[0097] In order to study the interaction between plant communities and soil factors under different grazing degradation degrees of meadow grassland and select the index system for diagnosing the degradation degree of meadow grassland, the Leymus chinensis + forb community non-grazing area (G0, That is, the grazing intensity is G 0.00 ), the light grazing utilization area (G1, that is, the grazing intensity is G 0.23 ), moderate grazing utilization area (G2, that is, the grazing intensity is G 0.46 ), the extreme grazing utilization area (G3, that is, the grazing intensity is G 0.69 ) using the "Canonical Correlation Analysis (CCA)" method to analyze the correlation between plant communities and soil factors.

[0098] In each degree of degradation, the plant community variable group (i.e. the first vegetation characteristic group) consists of variables or vegetation...

Embodiment 3

[0287] Embodiment 3, method inspection

[0288] Taking the data that is not used in the establishment of the model of Example 2 in Example 1 as the data of the meadow grassland to be evaluated, calculate the indicator degree d according to the method of Example 2 i According to the threshold value of Example 2, the degradation level of the meadow grassland to be evaluated is judged, and the result is completely consistent with the actual situation. Prove that the accuracy of the method of this application is very good.

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Abstract

The present application discloses a model for evaluating different degradation degrees of meadow grassland, its establishment method and application. This application aims at natural grasslands with different degrees of degradation caused by different degrees of utilization of meadows and grasslands. Through field control experiments, the field ecological survey method is used to study the response mechanism of meadows and grasslands degradation to human activities (control grazing), and principal component analysis is used. , canonical correlation and fuzzy mathematics to establish a matrix, establish a diagnostic method for the indicator degree of the degradation assessment system of different utilization levels, screen the grassland vegetation and soil index systems of different utilization modes and different degradation degrees, obtain the indicator degrees of different degradation degrees, and establish a scientific and operable comparison Strong meadow grassland degradation quantitative evaluation index system indicator diagnostic method. This application has practical significance for the establishment of the evaluation index system of meadow grassland degradation, the objective judgment of the degradation status of meadow grassland, and the promotion of grassland animal husbandry production and environmental protection.

Description

technical field [0001] The invention relates to the field of grassland ecosystem protection, in particular to a model for evaluating different degradation degrees of meadow grassland and its establishment method and application. Background technique [0002] my country's grassland area is 6 billion mu, accounting for 41.7% of the country's land area, of which the northern meadow and meadow grassland area is about 596 million mu, which is the most productive and diverse grassland in the northern pastoral area, and its livestock carrying capacity is equivalent to other temperate grassland types The sum of its ecological and production functions has a pivotal position. Compared with grassland types in arid regions, meadow grasslands have more diverse utilization patterns and more complex degradation processes and mechanisms. Since the 1980s, more than 90% of grasslands in my country have degraded, and the productivity of northern meadow grasslands has dropped by 20-50%. The prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/26G06K9/62G06N7/02
Inventor 闫瑞瑞辛晓平沈贝贝陈宝瑞
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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