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Method for improving physical properties of urban soil

A technology of physical properties and soil, which is applied in the field of improving the physical properties of urban soil, can solve the problems of serious water consumption, plant death, and poor drought resistance of plants in urban gardens, so as to improve soil infiltration capacity, promote plant growth, and improve soil quality. The effect of ventilation

Inactive Publication Date: 2014-08-06
SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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AI Technical Summary

Problems solved by technology

After the construction of a large number of green spaces, it is often prone to large areas of water accumulation in rainy days, and many plants die. In the dry season, plants have poor drought resistance and need artificial irrigation, resulting in serious water consumption for urban garden plant maintenance. This is a problem for Chinese cities that generally lack water. undeniably overwhelmed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the preparation of artificial soil for urban greening

[0024] First crush the green plant waste collected from various places to a particle size of 10-20mm, adjust the C / N ratio to 25-30, and the water content to 40-60% before composting, that is, composting in a rain-shielding place, composting The height is 0.45~1.2m, and the compost volume is 2~10 cubic meters; after 30~60 days of decomposing treatment, when the temperature of the compost no longer rises and the water content reaches below 38%, fully decomposed green plant waste can be obtained Decomposed product; 80% (percentage by weight) of the green plant waste decomposed particle diameter2 o 5 +K 2 O)=2.98%, dry density=0.68Mg / m 3 , wet density3 , Ventilation porosity 17.02%.

[0025] The organic fertilizer comes from poultry and livestock manure, after 30-40 days of fermentation treatment, the EC value is 6.87mS / cm;

[0026] In order to ensure the uniformity of the improvement effect, the par...

Embodiment 2

[0032] Embodiment 2: be used for the improvement of soil physical properties of urban green spaces

[0033] On-site investigation of the soil after the construction of the outer ring of Shanghai Chenshan Botanical Garden, a fast greening land in Shanghai, the pH of the soil is 8.45, and the soil bulk density is 1.54Mg / m 3 , the ventilated porosity is 2.31%, and the saturated hydraulic conductivity is 1.28mm / h. Moreover, the field investigation found that the physical and chemical properties of the soil in Chenshan Botanical Garden have seriously affected the growth of plants, many plants did not grow well, and even plant death occurred; and the deterioration of soil physical properties led to water accumulation in rainy days, and severe water shortage in dry seasons Phenomenon.

[0034] Considering the serious compaction of the soil in Chenshan Botanical Garden, the ratio of the improved formula was adjusted to original soil: green plant waste decomposed product: organic fertil...

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Abstract

The invention relates to a method for improving physical properties of urban soil. The method comprises the following steps of weighing 85 to 90 percent of planting natural soil with degraded physical properties, 8 to 10 percent of green plant waste decomposed products and 2 to 5 percent of organic fertilizers, weighing 0.5 to 2 kilograms of flue gas desulphurization gypsum to every cubic meter of the natural soil, the green plant waste decomposed products and the organic fertilizers, fully mixing the natural soil, the green plant waste decomposed products, the organic fertilizers and the flue gas desulphurization gypsum, wherein the green plant waste decomposed products are obtained by composting and fully decomposing the green plant waste for 30 to 60 days; the organic fertilizers are products obtained by 30- to 60-day fertilization and decomposition. According to the method, the raw materials are readily available, the waste is turned into wealth, and the physiochemical properties, particularly the physical structure, of the urban soil are effectively improved, so that the saturated hydraulic conductivity and effective water content of the soil are increased, positive effects on the promotion of urban energy conservation and emission reduction and the improvement of the eco-environmental quality of the soil are achieved, and the method has good social, economic and environmental benefits.

Description

technical field [0001] The invention relates to a method for improving physical properties of urban soil. Specifically, it is a method of using desulfurized gypsum and greening plant waste to improve the original soil for planting that has degraded the physical properties of urban soil caused by compaction and other reasons, and belongs to soil, urban ecological environment, landscaping, city appearance and environmental protection, and municipal management. and agricultural technology. Background technique [0002] Urbanization is the mainstream of today's social development, especially in developing countries such as China. Urban greening is developing rapidly in line with the development of urbanization. For example, the per capita green area in Shanghai increased from 1.69m2 in 1995. 2 Increased to 13.1m in 2011 2 . In order to meet the needs of rapid urban greening, a large number of machines are used for greening earthwork construction, coupled with the large popul...

Claims

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Application Information

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IPC IPC(8): A01B79/02
Inventor 方海兰伍海兵彭喜玲彭红玲梁晶吕子文郝冠军
Owner SHANGHAI ACADEMY OF LANDSCAPE ARCHITECTURE SCI & PLANNING
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