Imitative ecological afforestation method for Haloxylon ammodendron in desert area of sandstorm front

Abstract

The invention discloses an imitative ecological afforestation method for Haloxylon ammodendron in a desert area of a sandstorm front, belonging to the technical field of plant cultivation. Desert land with a soil water content of 2% and above and a saline-alkali degree of less than 2% is selected as afforestation land. Cultivation belts are dug out along the eastwest trend of the afforestation land before the soil defreezing and plantation. In the cultivation belts, heeling-in ditches for heeling in are dug along the eastwest trend. Then direct-seeding forestation, irrigation, pest control, and enclosing management and protection are successively applied. Cultivation belts are dug out before plantation and afforestation, so that low survival rate and growth rate of Haloxylon ammodendron caused by the fact that weeds compete with Haloxylon ammodendron for water and fertilizer are avoided. At the same time, the original ecology is maintained by keeping certain space between every two cultivation belts and damage to local ecological environments can be prevented. Demands for water during plantation of Haloxylon ammodendron are sustained by the construction of reservoirs. Thus, the transplanting survival rate of Haloxylon ammodendron is remarkably increased to 90% and above in comparison with the traditional transplanting survival rate of about 10%.

Description

technical field [0001] The invention belongs to the technical field of plant planting, in particular to a method for imitating ecological afforestation of Haloxylon in desert areas at frontiers of wind and sand. Background technique [0002] Haloxylon is a small tree of the Chenopodiaceae Haloxylon genus, which is a national second-class protected plant. It has strong drought resistance, heat resistance, cold resistance, and salt tolerance. The salt content in the stems and branches is as high as about 15%. Strong, fast-growing, dense branches, well-developed root system, strong windbreak and sand-fixing ability, it is an excellent tree species for sand-fixing and afforestation in the arid desert areas of Northwest my country and Inner Mongolia. Haloxylon is a hard material with strong firepower, and it is a high-quality fuelwood. Its twigs are also the feed that livestock like to eat, and the precious Chinese medicine cistanche is parasitic on the roots of Haloxylon, which h...

AI Technical Summary

Problems solved by technology

However, in the process of planting Haloxylon in frontier desert areas with wind and sand, the survival rate of transplanted seedlings for afforestation is only about 10%. Success, severely limited the development of Haloxylon and related industries

[0004] In order to improve the survival rate of Haloxylon seedlings transplanted for afforestation, most of the existing technologies transform the afforestation land when transplanting Haloxylon seedlings. The improvement methods include plowing the land, fertilizing and placing nutrient substrates, etc., such as the Haloxylon disclosed by Zhang Zhenrong and Wang Rongna. Artificial cultivation technology, in the incomplete soil preparation technology, only discloses the specific method of hole planting, although its planting effect is improved compared with traditional planting, but due to the influence of soil conditions in sandy areas, the improvement effect is not obvious; patent CN104429802A discloses A method for afforestation of Haloxylon-free vegetation on heavy clay soil in arid areas, and discloses the method of "organizing the terrain into a water collection tank, digging planting holes at the bottom of the tank and planting Haloxylon", although it solves the problem of water shortage in desert areas at the frontier of sandstorms The problem of Haloxylon survival rate has been improved, but the local original ecology is destroyed due to large-scale land preparation, and it is also poor in defense against rainy weather, which easily causes root rot; The method of direct-seeding afforestation in the growing season discloses "including steps: 1) determining the afforestation site; 2) laying drip irrigation pipes on the afforestation site; 3) irrigating before sowing; 4) sowing; 5) managing the Haloxylon seeds in the same year after sowing; The planting method of "management after the second year", which improves the survival rate and preservation rate of Haloxylon planting, and reduces the dependence of the team on the weather, but this method increases the cost due to the laying of pipelines, and the lack of soil nutrients in desert areas makes Haloxylon growth is poor, and even affects the survival rate; CN102577778A discloses the dwarfing propagation technology of Haloxylon, which discloses "comprising steps: 1) transplanting and inoculation with inoculation paper; 2) applying a small amount of farm manure or chemical fertilizer; 3) planting The planting method of marking the location, etc., which reduces the damage to the natural environment and wild vegetation by humans, and has a high success rate of planting

However, the use of chemical fertilizers in the frontier desert areas of wind and sand not only destroys the original soil quality of the local soil, but also takes a relatively long time for the granular fertilizers to melt and absorb the crops, and is easily washed away when watering, and the fertilizer effect cannot be fully exerted; The artificial planting method discloses the method of "nutrition bag cultivation Haloxylon", which is obviously costly and cannot be popularized on a large scale

More importantly, there is a lot of wind and sand in the desert area at the frontier of wind and sand, and conventional fertilization methods, such as direct seeding, will easily blow away the topdressing fertilizer, and it is difficult to achieve substantive effects