Irrigation-free populus euphratica afforestation method

Abstract

The invention provides an irrigation-free populus euphratica afforestation method. By changing the micro-environment for growth and development of afforestation populus euphratica seedlings, it is guaranteed that the afforestation populus euphratica seedlings can normally grow and develop in the required root system environment, and the survival rate, the preservation rate and the overall afforestation effect of populus euphratica seedling afforestation are improved; and the survival rate and the preservation rate of the populus euphratica seedlings are as high as 80% or above, and the method has great practical value and good application prospects.

Description

technical field [0001] The invention relates to the technical field of tree afforestation, in particular to a method for afforestation of Populus euphratica without irrigation. Background technique [0002] The Tarim River in Xinjiang is located in the extremely arid region of inland Eurasia, with a total length of 1,321 kilometers, a total population of 10.94 million, a total water resource of 44.3 billion cubic meters, and an irrigated area of ​​45.94 million mu. There are 15.3556 million mu of Populus euphratica forest resources in the Tarim River Basin, including 7.9597 million mu of forest land and 7.3959 million mu of sparse forest land, accounting for more than 90% of the total area of ​​Populus euphratica forest in my country. area. Populus euphratica forest plays an important role in climate regulation, windbreak and sand fixation, river stabilization, oasis protection, etc. It is the main body to maintain the balance of the oasis ecosystem in the extremely arid a...

AI Technical Summary

Problems solved by technology

[0003] At present, the main problems faced by Populus euphratica forests in the Tarim River Basin are as follows: First, affected by problems such as excessive development of resources, insufficient ecological water supply, fixed river channels, and no flood irrigation, large areas of Populus euphratica forests have declined or even died. More than 9.6 million mu; second, large-scale decline and even death of Populus euphratica forests. The core problem is that under the current natural environmental conditions, Populus euphratica cannot achieve natural regeneration, that is, seed regeneration and root tiller regeneration. Adult and over-mature Populus euphratica forests abound. However, there is no natural regeneration of young and middle-aged forests, and the continuous death of mature and over-mature Populus euphratica forests has caused large-scale decline and even extinction of Populus euphratica forests.

[0005] Due to the current environmental conditions in the Tarim River Basin, excessive development of water resources, insufficient supply of ecological water, reduced overall flow of the river, construction of a large number of reservoirs upstream to store floodwater and a large number of flood irrigation, resulting in the basic stabilization of the river channel and the decline of the groundwater level. An effective flood-to-dry ratio cannot be formed, and a floodplain that is conducive to the natural regeneration of Populus euphratica cannot be formed. A large amount of ground cannot be flushed by floods and pressurized by saline-alkali, resulting in a large amount of salt-alkali accumulation on the surface, resulting in the inability of Populus euphratica seeds to take root. After the seeds of Populus euphratica fall to the ground, they cannot be found Saline-alkali soil and suitable water environment suitable for seed rooting and germination, resulting in the failure of normal rooting and germination of seeds, or death due to lack of water or saline-alkali stress after rooting and germination, and normal natural regeneration of seeds cannot be completed; on the other hand, Populus euphratica The root system of Populus euphratica cannot be scoured and stimulated by the flood, the groundwater level drops, the root system of Populus euphratica grows and develops underground, and the accumulation of salinity and alkali on the surface makes the root system of Populus euphratica unable to effectively form root seedlings and complete normal root regeneration; the third , The two sides of the Tarim River are usually far away from villages, and the area is large, so it is impossible to implement normal artificial irrigation and afforestation