Method for judging alpine meadow degradation degree based on root-soil ratio

A technology based on the degree of degradation and root soil, applied in the agricultural field, can solve the problems of lack of grassland type-specific methods, and achieve the effects of promoting sustainable development, improving grassland utilization rate and grassland restoration efficiency, and reducing restoration costs

Active Publication Date: 2020-12-08
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Application Information

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Problems solved by technology

However, there are currently few relevant methods for determining the degree of grassland de...

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  • Method for judging alpine meadow degradation degree based on root-soil ratio
  • Method for judging alpine meadow degradation degree based on root-soil ratio
  • Method for judging alpine meadow degradation degree based on root-soil ratio

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Embodiment 1

[0033] A method for judging the degradation degree of alpine meadow based on root-to-soil ratio, comprising the following steps:

[0034] Step 1. Collect the soil samples that need to be measured. The measured points are required to be evenly distributed. The aboveground vegetation is representative in the area, and the sampling points are not less than 5. The larger the sample size, the higher the representativeness;

[0035] Among them, representative means that its plant community status is consistent with the overall area, such as the coverage and height of the plant community at the sampling point area are not significantly lower or higher than the overall status of the area (below or higher than 10% of the overall status of the area), The number of plant species shall not be less than 80% of the region as a whole.

[0036] When collecting soil samples, it should be noted that the soil samples are all from the same depth range, and the soil sample volume is not less than ...

Embodiment 2

[0059] The root-to-soil ratio was used to determine the alpine meadow degradation gradient, which was verified in Zoige alpine swamp meadow with different degradation gradients in August 2018. The verification method is as follows:

[0060] 1. Determine the degradation gradient of swamp meadows in advance through the grading indicators of natural grassland degradation, desertification, and salinization (GB 19377-2003). It is determined that the sampling points contain two degraded gradients, original and moderate.

[0061] 2. Select a more representative community area to collect soil and root mixed samples. The samples are collected using the soil drill method (inner diameter 5cm), and the samples are collected at 0-10cm and 10-20cm respectively. 10 replicates per degradation gradient.

[0062] 3. Bring the mixed sample back to the laboratory, and through the combination of manual selection and sieving, the soil and root system are separated, and the live roots and dead roo...

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Abstract

The invention discloses a method for judging the degradation degree of alpine meadows based on the root-soil ratio. The method comprises the following steps that a soil sample with sites needing to bemeasured is selected, the sites needing to be measured are required to be evenly distributed, the vegetation situation on the ground has representativeness in an area, the number of sampling points is not smaller than 5, and the larger the sample size is, the higher the representativeness is; the meadow degradation stage is judged according to the root-soil ratio of the 0-10 cm soil sample, and the root-soil ratio of the 10-20 cm soil sample and the live and dead root ratio range of the whole soil layer soil sample serve as auxiliary data to assist in judging the degradation gradient. The accurate judgment range can strive for more effective time for alpine meadow scientific management and recovery measures, the grassland utilization rate and the grassland recovery efficiency are improved, and the recovery cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for judging the degree of degradation of alpine meadows based on root-to-soil ratio. Background technique [0002] The Qinghai-Tibet Plateau is an important water conservation area in my country and also a water tower in Asia. In recent years, due to global climate change and human interference, grassland degradation, desertification, and salinization have become increasingly serious. Grassland degradation is harmful to grassland productivity, local ecological environment and animal husbandry development. As the degree of degradation deepens, aboveground vegetation biomass, soil fertility, and soil biological activity decrease significantly, resulting in significantly lower natural water content, maximum water holding capacity, and soil water conservation than in undegraded states. volume dropped by 27%. The degradation of alpine meadows will have a se...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N33/24G01N21/25G01N5/00G01N1/08
CPCG01N33/0098G01N33/24G01N1/08G01N21/25G01N5/00
Inventor 王长庭胡雷吴鹏飞陈科宇王鑫杨文高
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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