CN101578943A

CN101578943A - Composite desertification control method

Info

Publication number: CN101578943A
Application number: CNA2009100847483A
Authority: CN
Inventors: 吴波; 王玉华; 钟贵廷; 杜敏
Original assignee: Research Institute of Forestry of Chinese Academy of Forestry
Current assignee: Research Institute of Forestry of Chinese Academy of Forestry
Priority date: 2009-05-21
Filing date: 2009-05-21
Publication date: 2009-11-18

Abstract

The invention discloses a composite desertification control method which comprises mixedly sowing annual herb tree species and perennial shrub species in the floating sand lands. In the invention, by mixedly sowing herb and shrub species in the floating sand lands, when the annual herbs wither to death, the overground deadwood and the underground root systems can retain for around 1 to 2 years and have good windbreak and sand-fixing effects, thus providing plant sand barriers for the shrubs which grow slowly and ensuring that the shrubs can grow rapidly in the second year. The composite sand consolidation structure featuring difference in growth time can effectively control soil drifting and desertification and soil erosion, reduce cost and improve desertification control efficiency dramatically.

Description

A kind of composite desertification control method

Technical field

The present invention relates to a kind of composite desertification control method of desert.

Background technology

At present, Chinese desertification land has 1,700,000 square kilometres approximately, and annual with 3400 square kilometres speed nearly in diffusion.In order to improve environment, prevent the desert migration, people have adopted the method for many sand controls, for example adopt Mechanical Method, comprise building sand-proof wall, truncheon grass etc.; Sow grass seeds for another example, fix the sand by vegetation.Though these methods have played certain sand fixation, it is not very good administering mobile bigger sand ground effect.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of composite desertification control method that can control the soil wind erosion desertification effectively and be convenient to operate.

In order to address the above problem, to the invention provides a kind of composite desertification control method and be: the annual herbaceous plant kind of mixed seeding and perennial shrub species on the sand ground that flows.

Preferably, the ratio of described annual herb plant species of mixed seeding and shrub species is 1: 1～20.

Preferably, described ratio is 1: 10.

Preferably, carry out the mixed seeding of seeds, sow by latticed during mixed seeding in rainy season.

Preferably, described herbaceous plant kind comprises: wherein one or more of oat, wheat, described shrub comprises: wherein one or more of poplar bavin, caragana microphylla, sand sagebrush (Artemisia filifolia) and yellow Chinese scholartree.

Preferably, described herbaceous plant is selected oat.

Preferably, described shrub is selected the poplar bavin.

The present invention irritates careless seeds by mixed seeding on the sandy soil that flow, after annual herbaceous plant is withered, its ground deadwood and underground root system also can keep about 1～2 year, the effect of well checking winds and fixing drifting sand is arranged, this just provides plant sand block for the slow shrub (poplar bavin, caragana microphylla etc.) of growth, enables ramp in 1 year.By such composite sand consolidation structure, can control soil wind erosion desertification and water ground effectively and run off.

Description of drawings

Fig. 1 is the preceding shot picture of sowing;

Fig. 2 is after planting 1 day shot picture;

Fig. 3 is after planting 7 days shot picture;

Fig. 4 is after planting 20 days shot picture;

Fig. 5 is after planting 3 months shot picture;

Fig. 6 is after planting 10 months shot picture;

Fig. 7 is after planting 22 months shot picture;

Fig. 8 is after planting 26 months shot picture;

Fig. 9 is after planting 5 years 7 months shot picture.

Embodiment

Below the present invention will be described in detail.

On the sand ground that flows, use gramineous plants oat and shrub species poplar bavin, caragana microphylla mixed seeding afforestation.Oat is a therophytes; sand ground rainy season after planting; can become a complete individuality by development growth in very short time; after withered then; its ground deadwood and underground root system also can keep about 1～2 year; the effect of well checking winds and fixing drifting sand is arranged, and just poplar bavin, caragana microphylla provide the sand-protecting barrier protection in order to grow more slowly for this, enable ramp in 1 year.Shrub and grass mix seeding adopts 1.5 * 1.5 (rice), 2 * 2 (rice) latticed live, and filling grass seed ratio is 1: 10 (ratio can be 1: 1～20), and mu amount of broadcasting is about 22 jin, if the sand dune gradient is bigger, but the root actual conditions are dwindled grid, strengthen weather-proof ability.

Shrub and grass mix seeding afforestation time and method be specifically:

Carry out direct seeding forestation at the exposed sand ground that flows, harm direct seeding forestation the cause for the success mainly is a stream, shows as: A, make seed be difficult to sprout; B, make the seedling of firm germination,, tan by the sun and dead, or hit, cut off the seedling acrial part because of the grains of sand because of eroding naked; C, make root system delicate, the seedling that retain strength is low is all blown disconnected the disappearance.So the direct seeding forestation time generally should be avoided strong wind season, is selected in and carries out the rainy season that stream seldom occurs.

On the sand ground that flows, carry out direct seeding forestation with poplar bavin seed.For preventing that the shrub growth of seedling initial stage from suffering harm such as wind erosion, sand cut, sand buries, day burns; poplar bavin, oat seeds such as (or wheats) are mixed the back sowing in 1: 10 ratio; Avena herbaceous plant, the oat of intensive growth have formed the biological sand-protecting barrier of protection shrub seedling.Every mu of seeding quantity is 11 kilograms, uses the latticed afforestation seeding of sand control seed-sowing machine in rainy season, realizes the whole ground of trench digging, sowing, earthing one-shot forming.Mesh-density is 1 * 2～3 * 3 (m).

Shrub species can also be selected elm, caragana microphylla, sand sagebrush (Artemisia filifolia) and Huang Huai etc. except selecting above-mentioned poplar bavin.Certainly, preferred poplar bavin and caragana microphylla mainly are because select poplar bavin and caragana microphylla can also improve the biomass on grassland.Adapt to the sand ground growing plants and want palatability strong as feed, the nutrient composition content height, poplar bavin and caragana microphylla can both meet the demands well.In addition, when selecting, should also be noted that perennial Qiao, the shrub that suitable increase resistance is high, to constitute multi-level safeguard structure.

The sowing effect is specifically as Fig. 1～shown in Figure 9.Fig. 1 is the preceding shot picture of sowing; Fig. 2 is after planting 1 day shot picture; Fig. 3 is after planting 7 days shot picture; Fig. 4 is after planting 20 days shot picture; Fig. 5 is after planting 3 months shot picture; Fig. 6 is after planting 10 months shot picture; Fig. 7 is after planting 22 months shot picture; Fig. 8 is after planting 26 months shot picture; Fig. 9 is after planting 5 years 7 months shot picture.By above-mentioned desertification control method, can administer large tracts of land area sand ground every year, all kinds of sandy land vegetation cover degrees in husky district increase fast, have controlled the soil wind erosion desertification effectively, make farming and animal husbandry production obtain stable development, and ecotope obviously improves.

In sum; being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention, therefore; all any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of composite desertification control method is characterized in that: the annual herbaceous plant seeds of mixed seeding and perennial shrub species on the sand ground that flows.

2, the method for claim 1 is characterized in that: the ratio of described herbaceous plant seeds of mixed seeding and shrub species is 1: 1～20.

3, method as claimed in claim 2 is characterized in that: described ratio is 1: 10.

4, the method for claim 1 is characterized in that: carry out mixed seeding in rainy season, (m) is latticed sows by 1 * 2～3 * 3 during mixed seeding.

5, as the arbitrary described method of claim 1 to 4, it is characterized in that: described herbaceous plant comprises: wherein one or more of oat, wheat, described shrub comprises: wherein one or more of poplar bavin, elm, caragana microphylla, sand sagebrush (Artemisia filifolia) and yellow Chinese scholartree.

6, method as claimed in claim 5 is characterized in that: described herbaceous plant is selected oat.

7, method as claimed in claim 5 is characterized in that: described shrub is selected the poplar bavin.