Low cover degree sand stabilizing method

Abstract

The invention provides a low cover degree sand stabilizing method, comprising the steps of planting one row to four rows of arbor and / or bush and / or subshrub in parallel to form a sand stabilizing forest shelter belt, and reserving a vegetation natural restoration belt between the forest shelter belts; and the forest shelter belts play roles of biological barrier for stabilizing sand, protection the stabilization of sand surface and promoting natural restoration of vegetation in the vegetation natural recovering belt, wherein the cover area of the arbor and the bush is 15-25 percent and the cover area of the vegetation natural restoration belt is 75-85 percent. By adopting a row-belt sand stabilizing mode, when the cover degree is 15-25 percent, the effect of stand stabilizing forests distributed in a row-belt mode for reducing the wind speed is 25-50 percent higher than that of the stand stabilizing forests an evenly-distributed and randomly-distributed mode for reducing the wind speed, the border-row advantages of forests can be fully exerted; and after the sand surface is stabilized, wide enough interband is beneficial to the infiltration of rainfall and natural recovery of the vegetation, and forms complex sand stabilizing vegetation for promoting natural recovery at zonality vegetation occupying 85-75 percent of land under the protection of forest belt occupying 15-25 percent of the land.

Description

technical field [0001] The invention relates to a sand fixing method. Background technique [0002] In arid and semi-arid areas, due to the lack of rainfall, after a long natural succession, the current sparse vegetation is gradually developed. For example, under the condition of complete rain feeding, the number of caragana forests in semi-arid areas is 550-700 per hectare. 200-500 trees / ha for elm forests and 200-400 trees / ha for poplar forests in semi-arid areas. This density matches the amount of precipitation, meets the conditions of water balance, and can ensure the stability of the forest stand. Under natural conditions, this kind of sparse forest cannot completely fix the quicksand, and the sand is still in a semi-flowing state. On the unstable sand surface, it is very difficult for vegetation to recover naturally. In the 1950s and 1960s, my country built a large area of ​​high-density (generally above 2,000 trees / ha) sand-fixing forests. As a result, the young and...

AI Technical Summary

Problems solved by technology

Under natural conditions, this kind of sparse forest cannot completely fix the quicksand, and the sand is still in a semi-flowing state. On the unstable sand surface, it is very difficult for vegetation to recover naturally

In the 1950s and 1960s, my country built a large area of ​​high-density (generally more than 2,000 trees / ha) sand-fixing forests. As a result, the young and middle-aged forests decayed and died, resulting in a significant decline in sand control effects.

The first two types are not very good at holding quicksand when the coverage is lower than 40%.

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