Sidewalk-frozen tree planting method for coastal saline-salt soil

A technology of underground roads and saline-alkali, applied in forestry, application, agriculture, etc., can solve problems that have not been involved, and achieve the effects of reducing groundwater levels, improving the utilization rate of salt water, and increasing soil water content

Inactive Publication Date: 2011-08-10
TIANJIN INST OF AGRI RESOURCES & ENVIRONMENTAL
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Problems solved by technology

There have been related reports on the improvement of saline-alkali land by using the freezing of salt water in winter, but the tree planti...

Method used

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  • Sidewalk-frozen tree planting method for coastal saline-salt soil
  • Sidewalk-frozen tree planting method for coastal saline-salt soil
  • Sidewalk-frozen tree planting method for coastal saline-salt soil

Examples

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Embodiment

[0032] Example: Sujiayuan, Dagang, Binhai New Area, Tianjin

[0033] Basic situation: In November 2009, the pavement was prepared to be planted. The salt content of the soil was 0.4%-0.6%, and the salt content of the salt water was 9.4g / L. In April 2010, 150 poplar trees (Pulus Zhongtian) were transplanted, with a DBH of 8-10cm.

[0034] Implementation process:

[0035] 1. Tree planting and road preparation

[0036] Before the soil is frozen, excavate the tree-planting sidewalk with a width of 0.8m and a depth of 1-1.2m. Dig a blind pipe ditch at the bottom of the roadway and install a blind pipe with a diameter of 8cm and a slope of 3 / 1000, leading to the water collection well; the upper part of the blind pipe is laid with a percolation layer (gravel + coarse sand) with a thickness of 15-20cm. Then, mix the excavated soil with a saline-alkali soil improver, and backfill 2 / 3 of the mixed soil.

[0037] 2. Salt water freezes

[0038] When the maximum temperature in winter ...

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Abstract

The invention relates to a sidewalk-frozen tree planting method for coastal saline-salt soil, comprising the following steps of: preparing a tree planting sidewalk in advance, paving an infiltration layer and a blind pipe in the sidewalk, mixing the raw soil with a modifying agent and filling; freezing salt water and irrigating in the sidewalk; covering in spring; and transplanting a nursery stock at proper time. In the method, salt water and fresh water can be separated in the salt water ice melting process in order to produce enough salt washing fresh water and reduce the content of salt and alkaline in the soil. The method has the following beneficial effects: the method improves the utilization ratio of the salt water; more than 120 squares of salt washing fresh water and irrigating fresh water are saved per mu; the problem of lacking the fresh water in the coastal saline-salt soil is effectively solved; the modifying agent is used for increasing the soil grain structure, improving the composition of soil ions and reducing the content of harmful ions; the infiltration layer and the blind pipe can be used for discharging the salt in time in order to achieve the function of reducing the underwater level.

Description

technical field [0001] The invention belongs to the field of seaside saline-alkali land nursery stock cultivation technology and high-efficiency utilization of salt water resources. In particular, it relates to a tree planting method using salt water to freeze roadways in coastal saline-alkali land—a method for planting trees by freezing roadways in coastal saline-alkali land. Background technique [0002] Saline-alkali soil is a soil type widely distributed on the earth, and the saline-alkali land area in the world is about 955 million hm 2 , distributed in arid regions on all continents of the world, mainly concentrated in Eurasia, Africa, and western America. The total amount of saline-alkali land resources in my country is about 9.91×10 7 hm 2 , of which the modern saline-alkali soil area is 3.69×10 7 hm 2 , the residual saline-alkali soil is about 4.48×10 7 hm 2 , and there are about 1.73×10 7 hm 2 potential saline-alkali soil. Among them, about 18,000 km of c...

Claims

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Application Information

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IPC IPC(8): A01G23/00
Inventor 潘洁肖辉王立艳程文娟陆文龙
Owner TIANJIN INST OF AGRI RESOURCES & ENVIRONMENTAL
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