Afforestation technique employing dredger fill

A greening and afforestation technology, which is applied in afforestation, land preparation methods, botanical equipment and methods, etc., can solve the problems of time-consuming and laborious, and no mention of soil filling and solidification.

Inactive Publication Date: 2020-07-07
SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the current improvement method of dredger filling soil is time-consuming and labor-intensive, such as "salt drainage through hidden pipes and backfilling with foreign soil", and "water-saving saline-alkali flat land physical-chemical-ecological compreh...

Method used

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  • Afforestation technique employing dredger fill
  • Afforestation technique employing dredger fill
  • Afforestation technique employing dredger fill

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In Shanghai, 3.5 mu of dredged fill soil was selected for demonstration, and a small excavator was used to excavate horizontal ditches every 6 meters on the dredged fill soil. The ditch is trapezoidal in size: face width 50cm, bottom width 30cm, depth 60cm; the bottom of the ditch has a slope of 3‰. The dredged fill soil excavated from the drainage ditch is accumulated on both sides of the drainage ditch and dried naturally. The soil between the gutters is dug to a depth of 40 cm and a hole of 60 cm wide. Cotton stalks with a thickness of 5 cm were laid on the bottom and side walls of the hole as an isolation layer. After natural air-drying of the dredged fill soil excavated in the drainage ditches and planting holes, 3kg of flue gas desulfurization gypsum, 750g of polyferric sulfate, half square of organic medium, and 35kg of acidic organic fertilizer were applied to each cubic dredged fill soil for mixing and backfilling. Among them, the particle size of the organic...

Embodiment 2

[0030] On the basis of Example 1, sprinkle Tianqing 12g / m in the forest 2 , and spray phosphogypsum after defluoridation every quarter, and the spraying amount of phosphogypsum is 12 kg / mu. After 2 years of planting, the survival rate of Luoyu fir reached 92%, and the bulk density was 1.26 Mg / m 3 , the soil pH is 8.11, the salt content is 2.53g / kg, and the soil organic matter content is 16.3g / kg.

Embodiment 3

[0032] On the basis of Example 1, at the same time, 3.5% alginic acid by weight was added to the planting soil in the tree hole, and the survival rate of Luoyu fir was 95% after planting for 2 years, and the bulk density was 1.23Mg / m 3 , the soil pH is 8.05, the salt content is 2.48g / kg, and the soil organic matter content is 16.5 g / kg.

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Abstract

The invention provides an afforestation method employing dredger fill, in particular an afforestation technique employing the dredger fill. In order to solve the technical problem of afforestation employing the dredger fill, the method mainly comprises the steps of digging ditches in the dredger fill to discharge accumulated water and depositing the dug dredger fill at two sides of the ditches; raising the ground and then digging planting holes in the dredger fill between the ditches; and laying agricultural organic wastes, such as cotton straws and corn straws or organic waste cadmium salts,such as deadwoods and weeds for landscaping at the bottoms and the peripheries of tree holes; and improving the dug dredger fill by adopting desulfurized gypsum, organic media, polymeric ferric sulfate and acid organic fertilizers, improving the physical and chemical properties of the dredger fill, and backfilling the dredger fill for planting greening plants. According to the afforestation method, soil replacement is not needed, solidification of the dredger fill is accelerated through changing a terrain and discharging the accumulated water, and the dredger fill is rapidly improved for afforestation, so that the survival rate of trees can be improved.

Description

technical field [0001] The invention provides a method for afforestation by dredging filling soil, in particular a process method for afforestation by dredging filling soil. Background technique [0002] Dredger fill is a fill formed by hydraulic filling of mud and sand. It is one of the common artificial fills along the coast of my country. It is mainly due to the regulation or dredging of river channels, or the need to fill up or fill up a certain area near the river due to industrial and agricultural production. In some areas, high-pressure mud pumps are used to discharge the mud and sand dug out by the dredger through the mud delivery pipe to the areas that need to be filled and the accumulation of mud and sand. The former is planned and purposeful filling, while the latter is without The purpose is to accumulate, after sedimentation and drainage, a large area of ​​dredger fill soil is formed, and its composition is clay and silt. Under the action of hydraulic separation, ...

Claims

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Application Information

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IPC IPC(8): A01G23/00A01G17/00A01G22/00A01G22/40A01B79/02
CPCA01B79/02A01G17/005A01G23/00A01G22/00A01G22/40Y02P60/40Y02A40/22
Inventor 梁晶张青青蔡永立伍海兵陈平何小丽徐冰
Owner SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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