THE MOISTURE POTENTIAL IN CONDITIONS OF PHASE TRANSITION OF SOIL SOLUTION IN SOD-PODZOLIC SOIL
Н.А. МУРОМЦЕВ1, К.Б. АНИСИМОВ1, Ю.А. МАЖАЙСКИЙ2, Н.А. СЕМЕНОВ3
1Почвенный институт им. В.В. Докучаева, Москва
2Мещерский филиал ВНИИГиМ им. А.Н. Костякова, Рязань
3Всероссийский институт кормов им. В.Р. Вильямса, Лобня
DOI: https://doi.org/10.17512/bozpe.2018.1.08
Article (PDF)
KEYWORDS
atmospheric precipitation, total evaporation, moisture potential, soil, temperature, moisture exchange, aeration zone, the lowest moisture, capacity, diffusion of moisture
TOPICS
Energy-efficient construction, Building materials, Architecture in sustainable, onstruction, Building installations
ABSTRACT
A new phenomenon of a sharp jump - like increase of the moisture potential is established in the transition of positive soil temperature values through zero to the region of negative values. The process proceeds under conditions of a phase transition of the soil solution with the stable state of all other soil parameters. The decrease of the moisture potential (at constant humidity) under conditions of temperature increase is explained by the increase in mobility and activity of moisture ions. The decrease in temperature causes an increase in the potential due to a decrease in the activity and mobility of water ions. This phenomenon is similar to reducing the moisture content in soil. Daily changes in soil temperature and soil moisture potential are insignificant and is in the range 0.1÷1.9°C and 2÷3 kPa respectively.
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