Substrate special for sponge city greening and production method thereof

Abstract

The invention discloses a substrate special for sponge city greening and a production method thereof. The substrate comprises, by weight, 3-5 parts of a fermentation product of mushroom residues, vinegar dregs and cassava residues, 2-4 parts of medium and coarse sand, 1-2 parts of carbonized rice husk or plant ash, 2-4 parts of coco coir and 2-3 parts of soil. The particle size of the substrate isnot larger than 50 mm, the unit weight of the substrate is 0.1-0.8 g / cm<3>, the dry density of the substrate is 0.1-0.8 Mg / m<3>, the wet density of the substrate is not larger than 1.2 Mg / m<3>, the total porosity of the substrate is larger than 75%, saturation water absorbency of the substrate is larger than 400%, water-holding porosity of the substrate is larger than 60%, aeration porosity of the substrate is not larger than 20%, the large pore-to-small pore ratio of the substrate is 0.25-0.7, and the pH of the substrate is 5.0-8.0. The production method includes: processing the raw materials, fermenting the raw materials, mixing and stirring, measuring, regulating physical and chemical indexes, packaging in a quantified manner, and the like. The substrate produced by the method is goodin water-holding capacity and water permeability and quite suitable for sponge city greening.

Description

technical field [0001] The invention relates to a horticultural substrate and a production method, in particular to a sponge city greening special substrate and a production method, belonging to the field of horticultural technology. 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 us...

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.