Natural repairing and recovering method of deteriorated grassland in loess plateau

A technology for the Loess Plateau and degraded grassland, applied in the fields of botanical equipment and methods, horticulture, and application, can solve the problems of wind erosion salinization and soil barrenness, unclear grassland ownership, and blocked seed reproduction and nutrient renewal. , to achieve significant ecological economic and social benefits, increase the biomass of grassland vegetation, and enrich species diversity.

Inactive Publication Date: 2014-03-12
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The livestock grazing on the grassland is overloaded for a long time, frequently gnaws and tramples, the photosynthesis of the pasture cannot be carried out normally, the seed reproduction and nutrient renewal are hindered, and the vitality gradually declines; Grass, shrubs, etc., destroy grassland vegetation, and aggravate wind erosion, water erosion, desertification, salinization and soil barrenness; (3) Improper management
Due to the lack of protection and management measures and the strong influence of various inappropriate factors in residential areas, herd areas, drinking water points or on both sides of rivers and roads, the grassland degrades in concentric circles or parallel to rivers and roads, and gradually expands outwards. The closer the base point, road, and water source are, the more serious the degradation will be; (4) The use and management authority of the grassland is unclear
Livestock are raised by households, but the ownership of grassland is unclear, and unlimited use is free, resulting in overgrazing and overgrazing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method of natural restoration and restoration of degraded grassland in the Loess Plateau. First, fences are set up to prevent the slopes of barren hills and slopes with rainfall less than 450mm in the hinterland of the Loess Plateau, and the distribution is uneven during the year. It is often in the spring (returning period) and biological During the peak period of high-volume growth (joining period), drought stress is very serious. This is a critical period for forage growth. The closure prevents interference from humans and animals. It is a layer of withered grass that has formed on the surface of the grassland, which can alleviate the evaporation of soil water and regulate The water use of the soil reservoir promotes the greening of pasture and the growth of biomass. This method has been demonstrated in the hinterland of the Loess Plateau in an area of ​​1,000 hectares.

Embodiment 2

[0017] A method for natural restoration and restoration of degraded grassland in the Loess Plateau. First, fences are set up. The primary and secondary bare land and grassland vegetation that are seriously degraded on the barren hills and slopes are completely closed in spring every year. The grass grows vigorously in summer or autumn. The community structure is reasonable, and reasonable mowing can be carried out when the forage is well developed. On the one hand, mowing can promote the natural regeneration of grassland and prevent grassland degradation; on the other hand, mowing can artificially disturb the fall of mature forage seeds and accelerate the natural regeneration of grassland; Three mowing can stimulate the formation of grass buds, prevent excessive consumption of nutrients, and promote the early greening of forages. This method has been demonstrated in southern Ningxia in an area of ​​1,500 hectares.

Embodiment 3

[0019] A method for natural restoration and restoration of degraded grassland in the Loess Plateau; first, fences are set up, and the bare land without irrigation conditions for returning farmland does not need to adopt any artificial control and restoration measures to allow it to recover naturally. In the initial stage of natural restoration for 1 to 2 years, the composition of plants is dominated by artemisia, with low biomass and poor forage quality; in the middle stage of 3 to 5 years, the composition of plants is dominated by grasses, compositae and legumes , Forage species abundance increases, and forage quality is medium; in the later stage of 6 to 8 years, the composition of plants is dominated by grasses, which not only has large coverage, high biomass, but also has excellent forage species, and is an excellent mowing and grazing grassland. This method has been demonstrated in southern Ningxia and Gansu's Longdong area in an area of ​​3000 hectares.

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Abstract

The invention relates to a natural repairing and recovering method of deteriorated grassland in the loess plateau, and belongs to the technical field of recovering methods of the deteriorated grassland. The method is based on forbidden recovering and supplemented by the manual control and manual interference measures, namely cement stand columns, chain line fences and other forbidden facilities are arranged to completely forbid the original areas where grassland vegetation is destroyed and degraded seriously or agriculture and forestry can not be operated and forage grass can grow, human and animal interference can be controlled strictly, and chance and time for living and multiplying of grassland are given. The method can improve the converge degree of deteriorated grassland vegetation by 50-75% and the biomass of the grassland vegetation by 50-80%, the diversity of species is richer and richer, the number of grassland vegetation and species is increased to 313 from 68 before the forbidding, the grassland quality is improved, and in the plant structure of the recovered grassland community, the grass family and feverfew plants account for 26.8%, the beam or pea family plants account for 8.3%, and the other plants accounting for 64.9% are included in the 33 families. The ecological economy and social benefits of the grassland are significant, and the grassland becomes the demonstration model of the loess plateau.

Description

Technical field [0001] The invention relates to a natural restoration and restoration method for degraded grassland in the Loess Plateau, belonging to the technical field of restoration methods for degraded vegetation. Background technique [0002] At present, the restoration of vegetation in barren hills, barren slopes, reclaimed farmland, abandoned land or other arid and semi-arid areas on the Loess Plateau generally adopts manual and mechanical excavation methods to increase the damage to the original landform and soil crust. , Increase the wound surface of the soil surface, accelerate the evaporation of water on the soil surface, and it is also difficult to stop the leakage and loss of water, fertilizer, and soil. The grassland vegetation has insufficient soil moisture, the grassland recovery speed and growth are slow, and the vegetation coverage is low. Reduce the ecological protection function of grassland. [0003] Under irrational utilization, the process of grassland ecos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00
Inventor 程积民井赵斌邱莉萍金晶炜李维军李伟杨云贵杨培志
Owner NORTHWEST A & F UNIV
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