Wind prevention, sand fixation and water retention afforestation method

Abstract

The invention discloses a wind prevention, sand fixation and water retention afforestation method and belongs to the technical field of environmental protection engineering. The method comprises steps as follows: a curing agent is prepared from sodium carboxymethylcellulose, anionic polyacrylamide, ferrous chloride and water; the curing agent and sand are blended to form cured sand; deep holes for tree planting and shallow trenches for grass planting are dug in the sand land, water collecting hoppers are drilled in the deep holes, the deep holes and the shallow trenches are filled with the cured sand, and the cured sand form deep hole sand fixation and water absorption layers in the deep holes and form shallow trench sand fixation and water absorption layers in the shallow trenches; saplings are planted in the deep holes, the roots of the saplings extend into the mouth parts of the water collecting hoppers, and grass seeds are scattered in the deep holes and the shallow trenches; the grass seeds are covered with a mulching film for maintenance, and small ventilation holes are formed in the mulching film. The curing agent and the sand soil are blended, inside gaps of soil particles can be filled with the blended curing agent and sand soil, the cured sand particles don't easily disperse and jump, sufficient water can be continuously provided for plants, and the long-time wind prevention, sand fixation and water retention effects are achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection engineering, in particular to a windproof, sand-fixing, water-retaining and greening method suitable for desert areas. Background technique [0002] Land desertification is an ecological environment problem caused by land degradation caused by human activities. China is one of the countries most seriously affected by desertification. In 1999, the area of ​​desertified land in my country reached 267.4 square kilometers, accounting for 27.9% of the total land area of ​​the country. %, and is still expanding at a rate of 3140 square kilometers every year. Among them, the area of ​​wind-eroded desertification is 187.3 square kilometers, accounting for 70% of the total desertified land area, manifested as desertification of farmland and grassland, mainly located in the arid and semi-arid areas of Northwest China, such as Inner Mongolia, Xinjiang, Gansu, Ningxia, and northern Shaanxi. I...

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Problems solved by technology

[0008] The windproof and sand-fixing greening planting method disclosed in this patent document can play a certain windproof effect by setting up multiple belt-shaped sand barriers in the mobile sand dune zone, but the windproof ability of the belt-shaped sand barriers is limited, and it is easy to be eroded by strong winds. Fundamentally, the sand is fixed, and the shrub seedlings planted at the location of the belt-shaped sand barrier are prone to water loss during the irrigation process, and the water retention effect is poor, which cannot effectively prevent sandy desertification.