Afforestation Techniques of Simplified Ditch Salt Drainage in Saline-alkali Poor Land

Abstract

The present invention discloses a poorest saline-alkali soil simple drain salt elimination forestation technique. The technique comprises underground water control, planting trench system construction, lateral seepage control, backfilling, planting and planting backfilling; and watering is needed at a nursery-grown plant survive stage and is not needed after survival. Compared with those in the prior art, the technique provided by the present invention has no sandstone salt-separating layer; through interaction of a forest layer and the soil, the depth for root growth is greatly increased, and megaphanerophytes can be grown on the forest land, thereby greatly raising a survival rate of afforestation; the afforestation cost in heavy saline soil is notably lowered and is no higher than 50 yuan per square meter; conventional agriculture and forestry measures are taken; improvement and salinity reduce of subsoil can be gradually promoted by a forest root growth layer, and the forests and the environment can form a healthy eco-system after the salinity of the subsoil naturally reduces; and watering is needed in the surviving stage but hardly needed after survival.

Description

technical field [0001] The invention relates to the technical field of afforestation, in particular to a simple culvert salinization afforestation process in a saline-alkali-poor land. Background technique [0002] The coastal saline-alkali land can use shallow soil layer, poor soil, compaction, poor air permeability, high soil salinity, and is easily affected by drought, flooding and typhoon, and lacks irrigation conditions. These unfavorable factors can directly or indirectly lead to Afforestation in coastal saline-alkali land has failed. Therefore, coastal saline-alkali land afforestation has always been a worldwide technical difficulty. In order to break through the "forbidden zone" of afforestation in coastal saline-alkali land, domestic and foreign scholars mainly conduct technical research in the selection of afforestation species and saline-alkali land improvement technology. [0003] 1. Selection of afforestation species [0004] The tree species that have carrie...

AI Technical Summary

Problems solved by technology

[0016] The cost of afforestation per square meter in the existing technology is between 120 yuan and 200 yuan, which cannot be used for large-scale afforestation production. The afforestation land of the culvert engineering technology needs to introduce a large amount of heterogeneous and refractory materials such as sand, gravel, and plastic pipes, and the trees cannot be separated from the lower layer. Soil forms a complete ecosystem

Although it can block salt, even after the natural salt reduction of the lower soil in the future, the root system of trees cannot absorb water and nutrients from the ground, and the stands need to be watered regularly, otherwise they are prone to drought stress. The growth soil layer of forest trees is only about 60cm, which will affect the high growth of large trees in the future. Due to the "ungrounded" plant layer in the existing technology, more irrigation management and maintenance costs are required after afforestation, and in places without irrigation conditions Can't apply