A Restoration Method for Severely Degraded Grassland in West Sichuan Alpine

Abstract

The invention discloses a restoration method for severely degraded grassland in western Sichuan high mountains. During the period of soil freezing, the range of grassland to be repaired is determined; the determined restoration range is divided into a first block and a second block by grid , the second block is the planned fire area; a firebreak is cut out on the inner boundary of each second block, and fire prevention facilities are installed on the firebreak; the fire is ignited at the downhill site, so that the second block After the planned fire is implemented, cow dung with grass seeds is spread on the surface of the burned area; after the first rain in the area, the fire facilities are dismantled. While safeguarding grassland biodiversity, the aboveground productivity of the entire grassland ecosystem is restored, providing more biological resources for regional summer grasslands and winter grasslands. The normal grazing utilization according to the balance system of grass and livestock can shorten the entire recovery period, which can effectively avoid the deterioration of soil conditions and play a very positive role in preventing land desertification.

Description

technical field [0001] The invention belongs to the fields of grass industry science and fire ecology, and relates to a restoration method of grassland, in particular to a restoration method of severely degraded grassland. Background technique [0002] The grassland in Northwest Sichuan is one of the five major pastoral areas in China. The grassland area in the subalpine area is the largest, and it is mostly distributed in the edge of the hill, the wide valley area of ​​​​the mountain, and the shoulder of the mountain valley. Due to the characteristics of alpine climate and the long-term trampling and grazing of livestock, the height of meadow vegetation in the area is mostly less than 60cm, which belongs to short grass grassland. There are many types of grassland plants, with dense growth and high coverage; the main vegetation on the ground can be divided into two layers, the upper layer is dominated by grasses, and the lower layer is sedges and weeds. Elymus spicosa, Kobr...

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Problems solved by technology

[0005] 1. The existing method uses a lot of fertilizers and medicines, plus the cost of transportation, which greatly increases the repair cost;

[0006] 2. The existing methods are mainly aimed at the grassland in Pingba area. If it is used in mountainous terrain, especially in the western Sichuan alpine region, it is not convenient for manual operation and large-scale control or restoration of degraded grassland;

[0007] 3. Existing methods do not consider the potential threats to regional soil physical and chemical properties and biodiversity caused by long-term fertilization and herbicide use

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