Trends and prospects of soil heating under conditions of protected ground

Abstract

Such vital processes in vegetable plants, like absorption of carbon dioxide (photosynthesis), water intake, absorption of nutrients from the soil, respiration, evaporation of water (transpiration), nutrients transfer from roots to leaves and fruits, as well as macronutrients transfer from leaves to roots, depend on the temperature regime. The research of technical and economic parameters of popular de-vices for heating of greenhouses allowed to define quite a number of operational disadvantages. A device for air heating of the soil in protected ground conditions, designed to increase yield and reduce the energy intensity of vegetable growing in the protected ground, is developed by the fellow workers of the FSBEI of Higher Education Pskov State University. The device consists of assembled segments, combined in a system, and a special fan heater with a low temperature range. The proposed device allows to ensure an intensive development of the root system of vegetable crops; to hasten the planting time of seeds or seedlings, and, consequently, to increase a fruiting period; to prevent death of plants associated with frost and diseases, caused by temperature changes; and to reduce the cost of heating of the protected ground.