Slag type soilless culture medium and preparation method thereof

Abstract

The invention belongs to the technical field of soilless culture, relates to a slag type soilless culture medium and a preparation method thereof, and specifically relates to a culture medium produced by using metallurgy waste wastes-slag, and a preparation method thereof. The slag type soilless culture medium is prepared by using the following raw materials by volume: 0.2-0.4 part of slag, 1-2 parts of grass carbon, 0.6-1 part of perlite and / or 0.6-0.8 part of vermiculite. A content of SiO2 in the slag is not smaller than 15wt%; a content of Cd in the slag is not larger than 120 mg / kg; a content of Pb in the slag is not larger than 50 mg / kg; a content of Hg in the slag is not larger than 0.30 mg / kg; and a content of As is not larger than 20 mg / kg. The problems of low utilization rate of slag, and high cost and incomplete nutritional ingredients existing in a conventional culture medium are overcome; resource utilization of the slag is realized; the slag type soilless culture medium and the preparation method thereof are scientific in design and reasonable in proportions, prevent toxic and side effect of the slag, and bring about enormous 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...

AI Technical Summary

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

Images