Steel slag type soilless culture substrate and preparation method thereof

Abstract

The invention belongs to the technical field of soilless cultivation, and relates to a solid cultivation substrate and a preparation method thereof, in particular to a cultivation substrate produced by utilizing metallurgical waste-steel slag and a preparation method thereof. The steel slag-type soilless culture substrate of the present invention is prepared from the following raw materials in volume ratio: 0.2-0.4 parts of steel slag, 1-2 parts of peat, and 0.6-1 part of perlite and / or 0.6-0.8 part of vermiculite; the steel slag The SiO2 content is not less than 15? wt%, Cd content is not more than 0.30? mg / kg, Cr content is not more than 120? mg / kg, Pb content is not more than 50? mg / kg, Hg content not more than 0.30? mg / kg, As content is not more than 20? mg / kg. The invention solves the problems of low utilization rate of steel slag in my country and the high cost and incomplete nutritional content of existing soilless culture substrates, realizes resource utilization of steel slag, and at the same time scientifically designs and rationally proportions to avoid toxic and side effects of steel slag, bringing Bring huge social, economic and ecological benefits.

Description

technical field [0001] The invention belongs to the technical field of soilless cultivation, and relates to a solid cultivation substrate and a preparation method thereof, in particular to a cultivation substrate produced by utilizing metallurgical waste-steel slag and a preparation method thereof. Background technique [0002] Soilless cultivation has become an important part of facility agriculture, an important form of industrial production of agricultural crops, and a new way to develop efficient agriculture. Soilless cultivation mainly includes substrate cultivation and hydroponics. The main cultivation medium of substrate cultivation is solid substrate. However, in hydroponics, solid cultivation substrate is also used in the seedling raising stage and in fixing and supporting crops during planting. This shows that The use of solid growing media is very common. my country's soilless cultivation started late, but now it is in a period of vigorous development. Since the...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a soilless cultivation method using metallurgical waste-steel slag as the substrate, to solve the problems of low utilization rate of steel slag in my country and the high cost and incomplete nutritional content of the existing soilless cultivation substrate, and to realize the cultivation of steel slag. At the same time of resource utilization, scientific design and reasonable proportion can avoid the toxic and side effects of steel slag and bring huge social, economic and ecological benefits

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