Preview

Soil Science and Agrochemistry

Advanced search

Nutrient substrate for plants on the base of zeolites

Abstract

Studied zeolite substrates consist of chemically modified clinoptilolite of the Kholinsky deposit (Transbaikal group, Russia) and contain correcting additives – natural phosphate minerals. Zeolite is saturated with K+ and NH4+ ions, the molar ratio of which (N/K) can vary in the range of N/K = 0,5–4. The pH value of the water in contact with the substrate can also be set during the production process (pH = 4,5–7,5). We studied the cultivation of the following crops in laboratory pot experiments: leaf lettuce; ryegrass; tomatoes; cucumber; seed potatoes; garden strawberries; zucchini; sweet pepper; arabidopsis; marigold; peas. As the main test culture for elucidating the influence of various factors on plant growth, we used leaf lettuce cultivar Aficion (Lactuca sativa, Aficion). Using this example, the influence of the following factors on plant growth on nutrient media containing a zeolite substrate was studied: granulometric composition of the substrate; the influence of the content of the substrate in mixtures with various sterile and nutritious soils; pH of water in contact with the substrate; the ratio of mobile nitrogen and potassium in the substrate. All tested plants can grow on 100 % zeolite substrate and respond positively to the addition of such a substrate to fertilized and non-fertilized soils. The addition of a relatively small amount of non-fertilized neutralized high-moor peat to the zeolite substrate dramatically improves plant growth. Plants grown on such mixtures contain an order of magnitude less nitrates in biomass than on nutrient soils fertilized with nitrates with comparable biomass yields.

For citations:


Soldatov V.S., Ezubets A.P., Saprykin V.V., Kosandrovich E.G., Shachenkova L.N. Nutrient substrate for plants on the base of zeolites. Soil Science and Agrochemistry. 2021;(1):149-161. (In Russ.)

Views: 354


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


ISSN 0130-8475 (Print)