Method for ameliorating saline and alkaline land

A technology of saline-alkali land and water-repellent layer, which is applied in the improvement of heavy clay loam saline-alkali land, which can solve problems such as strong soil evaporation, heavy soil compaction, poor water permeability, and lack of surface water resources, so as to reduce soil water evaporation and inhibit Soil capillary water, the effect of reducing soil water evaporation

Inactive Publication Date: 2011-01-19
北京三合盛茂生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the heavy clay loam saline-alkali land along the coast of Bohai Bay and Liaodong Bay, the soil is heavy (silty), compacted, and poor in water permeability, and the surface water resources that can be used to wash salt are scarce. Because of the small amount and instability, it is difficult to achieve the ideal improvement effect of saline-alkali land by traditional methods such as terraced fields, irrigation, and hidden pipes.

Method used

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  • Method for ameliorating saline and alkaline land
  • Method for ameliorating saline and alkaline land

Examples

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Embodiment 1

[0041] Implementation location: Saline-alkali wasteland of team 13 of Zhongjie Friendship Farm, Huanghua City, Hebei Province. The soil type is heavy clay loam, the soil bulk density is 1.40-1.68g / cm3, and the initial soil salt content is 8-9.2g / kg.

[0042]Excavate soil and repair ponds and build terraces according to the above method. The length and width of the bottom of the terrace are 41 meters x 41 meters, the length and width of the top are 37.5 meters x 37.5 meters, and the height is 1.60 meters; the length and width of the bottom of the shallow pool are 37.5 meters x 37.5 meters, and the length and width of the top are It is 41 meters by 41 meters, and the pool is 1.65 meters deep. There are two partition layers in the field, the first partition layer is at the bottom of the field, and the material of the partition layer is plastic film, and the second partition layer is at a height of 1 meter from the bottom of the field, and the material of the partition layer is re...

Embodiment 2

[0047] Implementation location: Saline-alkali wasteland of team 13 of Zhongjie Friendship Farm, Huanghua City, Hebei Province, the soil type is heavy clay loam, and the soil bulk density is 1.40-1.68g / cm 3 . In October 2009, the salt content of the terrace soil was 6-10g / kg.

[0048] The construction method of the terrace is basically the same as that of Example 1, except that reed bundles with both ends pointing towards the shallow pool are laid on the height of the second partition layer (at a height of 1 meter from the bottom of the terrace). The diameter of each bundle of reeds is 10-12 cm, and the length is 20 cm longer than the width of the terrace at this height, so that both ends can extend 10 centimeters outside the terrace. The reed bundles are lined up in sequence along the central line of Taitian, with a laying interval of 5 meters. The construction time of the terrace was April 2009, and the structure of the terrace is as attached figure 2 shown.

[0049] Fro...

Embodiment 3

[0053] Level the land, remove all sundries on the ground, pad the middle part of the terrace with soil 30-50 cm along the length of the terrace to form a slope slightly inclined toward the shallow pools on both sides; lay a layer of plastic on the slope Film or impermeable non-woven fabric 3, the seams of the film or non-woven fabric overlap each other by 15 cm; lay the pipe wall above the plastic film with seepage holes, and the pipe diameter is 110 mm PVC double-wall corrugated pipe 4-1, 4 -2. The corrugated pipe is divided into a main pipe 4-1 and multiple branch pipes 4-2. The main pipe is laid along the length of the field at the highest point in the middle of the field, and the outlets on both sides of the main pipe should extend outside the field. 0.5 meters, one end of the branch pipe is connected to the main pipe in the middle of the terrace, and the other end is laid along the width direction of the terrace to the shallow pools on both sides, and extends 0.3 meters ou...

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Abstract

The invention relates to a method for ameliorating a saline and alkaline land, in particular to a method for ameliorating a saline and alkaline land with heavily adhesive soil, which comprises: building raised fields to form a pattern of alternately distributed raised fields and shallow pools; preparing a raised field 1 to make a slope with two inclined sides, applying crushed straw and fermented cow dung on the surfaces of the raised fields, deeply plowing and raking the raised fields flat, wherein the vertical structure of each raised field comprises a bottom water isolating layer, bottom discharge pipes, a top water isolating layer and ridges from bottom up; and pilling sea ice or saline ice in the shallow pools on the surfaces of the raised fields, covering non-woven fabrics or crop straw on the surface of ice piles, and fixing covering materials on the surfaces of the raised fields. The method has the characteristics of high rate of desalination, soil fertility improvement, drought resistance and soil moisture conservation.

Description

technical field [0001] The invention relates to a method for improving saline-alkali soil, in particular to a method for improving saline-alkali soil with heavy clay loam. Background technique [0002] The saline-alkali land in the northern coastal areas of my country is mainly distributed in the Bohai Rim, including the Yellow River Delta along the Laizhou Bay, the sedimentary plains along the Bohai Bay, and the alluvial plains in the lower reaches of the Liaohe River along the Liaodong Bay. Influenced by seawater, these areas have high groundwater levels, strong salinity, and soil salinity up to 1%-3%. If no transformation is carried out, only some salt-tolerant plants can grow, such as reeds and Suaeda salsa, which cannot be cultivated. used in agriculture or forestry. [0003] After long-term production practice, my country has accumulated rich experience in saline-alkali land transformation. The main technical measures include terraced fields, soil improvement, drainag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
Inventor 顾卫许映军王静爱史培军陶军
Owner 北京三合盛茂生态科技有限公司
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