Substrate special for sponge city greening

Abstract

The invention discloses a substrate special for sponge city greening. The substrate is composed of a fermentation material of mushroom residues, acid sludge and manioc waste, medium-coarse sand, cokedchaff / plant ash, coco coir and soil. The substrate raw materials are evenly mixed and stirred according to a certain ratio after being preprocessed, and then a soil product with sponge characteristics is formed through screening and packaging. The substrate is prepared from, by volume, 3.5 parts of the fermentation material of mushroom residues, acid sludge and manioc waste, 2-4 parts of medium-coarse sand, 1-2 parts of coked chaff / plant ash, 2-4 parts of coco coir and 2-3 parts of soil. The physical and chemical indexes of the substrate include the granularity being smaller than or equal to50 mm, the unit weight being 0.1-0.8 g / cm<3>, the dry density being 0.1-0.8 mg / m<3>, the wet density being smaller than or equal to 1.2 mg / m<3>, the total porosity being larger than 75%, the saturation water absorption ratio being larger than 400%, the water holding porosity being larger than 60%, the aeration porosity being larger than or equal to 20%, the porosity ratio being 0.25-0.7 and the pHvalue being 5.0-8.0. The produced substrate has good water holding property and water permeability and is suitable for sponge city greening planting.

Description

technical field [0001] The invention relates to a horticultural substrate, in particular to a special substrate for sponge city greening, and belongs to the technical field of horticulture. Background technique [0002] "Sponge city" is an urban design concept based on maintaining the balance of drought and flood within the city. It requires the city as a whole to have good resilience in response to environmental changes or natural disasters, especially in the face of drought and flood disasters. Water absorption, water seepage and water storage are realized under large conditions, and water sources are released under drought conditions. Obviously, this urban design concept gives priority to ecological principles, and combines natural and artificial methods to maximize the accumulation, infiltration and purification of rainwater in urban areas on the premise of ensuring the safety of urban drainage and waterlogging. Promote the use of rainwater resources and ecological envi...

AI Technical Summary

Problems solved by technology

[0007] In the prior art, common soil is still used for urban greening. In some places, ordinary greening and horticultural substrates are used for cultivation. The water holding and water permeability effects are not ideal and cannot meet the requirements of sponge cities. This application is based on the original horticultural and greening substrates. On the other hand, the fermented materials produced by the fermentation of organic waste materials such as mushroom dregs and vinegar dregs are used to replace natural peat, and medium-coarse sand, plant ash, coconut bran, etc. are added, so that the physical and chemical properties of the substrate and the water holding and water permeability indicators are significantly better than the original ones. Substrate, the production cost is also greatly reduced. Document retrieval found that mushroom residue, vinegar residue, cassava residue fermentation materials, medium and coarse sand, plant ash, coconut bran are the main raw materials, and the sponge city greening special substrate produced has not yet been reported in China.