Method for recovering wind prevention and sand fixation functions of degenerated artificial sacsaoul forest

Abstract

The invention discloses a method for recovering wind prevention and sand fixation functions of a degenerated artificial sacsaoul forest. The method comprises the steps that a plastic mesh sand-protecting barrier or a wheat straw sand-protecting barrier or a clay sand-protecting barrier with the width of 200-300m is arranged on a windward side in degenerated artificial sacsaoul forests in a desert oasis transitional zone, two sides of a road, a wind sand gap and other places, terrain roughness is increased, the wind prevention and sand fixation functions are improved, under the premise that rainfall bearing density of the artificial sacsaoul forest is guaranteed, sacsaouls are planted in the plastic mesh sand-protecting barrier or the wheat straw sand-protecting barrier or the clay sand-protecting barrier in a complementary mode, and a preserved density of the sacsaoul forest in a desert area with 110mm rainfall is made to reach 570-600 plants / hm2. Compared with the prior art, the method greatly improves the surface roughness of a degenerated artificial sacsaoul forestland, wind speed of a ground layer is reduced, drift sand is fixed, wind erosion is reduced, a certain recovery effect is performed on degenerated vegetation and the environment thereof, after the plastic mesh sand-protecting barrier or the wheat straw sand-protecting barrier or the clay sand-protecting barrier is arranged, effective protective wind speed in the degenerated artificial sacsaoul forest is improved to 21m / s or 22m / s or 16m / s from 7.9m / s, and sand output in the forest is reduced by 97.3% or 99.9% or 91.4% respectively compared with a reference.

Description

technical field [0001] The invention relates to the technical field of desertification prevention and control, in particular to a method for restoring the windproof and sand-fixing function of a degraded artificial Haloxylon forest. Background technique [0002] Haloxylon is a shrub of Chenopodiaceae, the first batch of third-level protected plants in my country, and has the title of "King of Desert Plants". It is widely distributed in the desert areas of Central Asia. Haloxylon forest has the reputation of "desert forest" and is the most widely distributed vegetation type in the desert area of ​​the hinterland of Asia. Haloxylon tender stems are rich in nutrients and a moderate amount of salt, which is an excellent forage grass that camels like to eat; the material is hard and brittle, and has a high combustion value. The host plant of Cistanche deserticola has important economic value. At the same time, Haloxylon has the ecological adaptation characteristics of drought r...

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Problems solved by technology

However, groundwater levels continue to decline due to large-scale groundwater pumping in the region

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