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THE MOISTURE POTENTIAL IN CONDITIONS OF PHASE TRANSITION
OF SOIL SOLUTION IN SOD-PODZOLIC SOIL
| 1 | Почвенный институт им. В.В. Докучаева, Москва |
| 2 | Мещерский филиал ВНИИГиМ им. А.Н. Костякова, Рязань |
| 3 | Всероссийский институт кормов им. В.Р. Вильямса, Лобня |
Publication date: 2018-12-07
BoZPE 2018;(1):57–66
KEYWORDS
atmospheric precipitationtotal evaporationmoisture potentialsoiltemperaturemoisture exchangeaeration zonethe lowest moisturecapacitydiffusion of moisture
TOPICS
Energy-efficient constructionBuilding materialsArchitecture in sustainable constructionBuilding 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.
METADATA IN OTHER LANGUAGES:
Russian
ПОТЕНЦИАЛ ВЛАГИ В УСЛОВИЯХ ФАЗОВОГО ПЕРЕХОДА
ПОЧВЕННОГО РАСТВОРА В ДЕРНОВО-ПОДЗОЛИСТОЙ ПОЧВЕ
Установлено новое явление резкого скачкообразного повышения потенциала
влаги при переходе положительных значений температуры почв через ноль
в область отрицательных величин. Процесс протекает в условиях фазового
перехода почвенного раствора при стабильном состоянии всех других пара-
метров среды, за исключением температуры почвы. Понижение потенциала
влаги (при постоянной влажности) в условиях повышения температуры
объясняется возрастанием подвижности и активности ионов влаги. Понижение
температуры обусловливает возрастание потенциала в связи с понижением
активности и подвижности ионов воды. Данное явление аналогично снижению
содержания влаги в почве. Суточные изменения температуры почвы и потен-
циала почвенной влаги незначительны и лежат в пределах 0,1÷1,9°С и 2÷3 кПа
соответственно.
RELATED ARTICLE
"Digitization of the Construction of optimized energy potential" - a task funded under the 580 / P-DUN / 2017 agreement from the funds of the Minister of Science and Higher Education designated for dissemination activities request
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