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A method of restoring degraded grassland ecosystem by establishing Leymus chinensis

An ecosystem and Leymus chinensis technology, applied in botany equipment and methods, soil preparation methods, planting substrates, etc., can solve the problems of successful establishment of Leymus chinensis natural grassland, low seed germination rate and seedling survival rate, and periodic shortage of water To achieve considerable economic and ecological benefits, reduce water evaporation, and increase grassland biomass

Active Publication Date: 2022-01-28
INST OF BOTANY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional methods of no-tillage, supplementary sowing and aerial sowing can solve the problem of seed banks, due to factors such as unreasonable soil structure, nutrient deficiency and water shortage, the germination rate of seeds and the survival rate of seedlings using these methods are low. , it is difficult for Leymus chinensis to be successfully established in the severely degraded natural grassland

Method used

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  • A method of restoring degraded grassland ecosystem by establishing Leymus chinensis
  • A method of restoring degraded grassland ecosystem by establishing Leymus chinensis
  • A method of restoring degraded grassland ecosystem by establishing Leymus chinensis

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1 builds the method for planting Leymus chinensis

[0036] (1) Selection of planting points: According to the restoration plan, one planting point can be established every 10m×10m in the area to be restored;

[0037] (2) Preparation of nutrient soil: at the planting point, dig a circular pit with a diameter of 30cm and a depth of 30cm, take 80-90% of the excavated soil, add slow-release urea, diammonium phosphate, decomposed cow dung or sheep manure, making 1m 3 The soil contains 150-180g of slow-release urea, 25-30g of diammonium phosphate and 6500-7500g of decomposed animal manure, which is fully mixed and then backfilled into the pit;

[0038] (3) Preparation of cofferdam soil: take 10-20% of the excavated soil, add 100g of pregelatinized starch, fully mix and add appropriate amount of water to make mud;

[0039] (4) Seed preparation: soak the collected Leymus chinensis seeds with 3% potassium permanganate aqueous solution for 10-15 minutes, scoop out th...

Embodiment 2

[0043] Embodiment 2 Verification of the planting method of the present invention

[0044] In order to verify the beneficial effect of the planting method of the present invention, the inventor designed an orthogonal experiment with four factors and two levels, as shown in Table 1.

[0045] Table 1 Orthogonal experiment table

[0046]

[0047] Orthogonal experiment results are shown in Table 2.

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Abstract

The invention discloses a method for restoring a degraded grassland ecosystem by planting Leymus chinensis, belonging to the field of ecological restoration. The method is to dig a round pit at the planting point, take 80‑90% of the excavated soil, add slow-release urea, diammonium phosphate, and decomposed animal manure, mix it and backfill it to the round pit; The degradable agricultural film covers the round pit, and implants pre-germinated Leymus chinensis seeds in the soil at the position of the film hole. This method can avoid the problems of low germination rate of Leymus chinensis and low survival rate of seedlings caused by water and nutrient shortage, and is suitable for degraded, desertified and salinized grassland ecosystems caused by various reasons, and can make full use of the advantages of Leymus chinensis clonal reproduction , to achieve the purpose of cultivating a little and recovering a piece.

Description

technical field [0001] The invention belongs to the field of ecological restoration, and in particular relates to a method for restoring a degraded grassland ecosystem by planting Leymus chinensis. Background technique [0002] Due to long-term overgrazing and climate change, more than 90% of the grassland ecosystems that account for 40% of China's land area are degraded, desertified, and salinized to varying degrees. Grassland ecosystems undertake multiple functions of ecological security, food security, and national unity in northern my country. Under such circumstances, it is particularly urgent to restore biodiversity and ecosystem services to degraded grassland ecosystems. [0003] Restoration of constructive species is one of the main goals of restoration of degraded grassland ecosystems. However, the lack of seed bank and propagule bank of the founder species restricts the recovery of the founder species to a great extent. Leymus chinensis is the constructive specie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G24/10A01G24/30A01G24/20A01G22/00A01B79/02
CPCA01G24/10A01G24/30A01G24/20A01G22/00A01B79/02
Inventor 闫彩凤陈全胜张亮盖晓东赛西雅拉图
Owner INST OF BOTANY CHINESE ACAD OF SCI