INVESTIGATING SOIL TEMPERATURE VARIABILITY AND THERMAL DIFFUSIVITY IN GRASS COWERED AND SHADED AREAS BY TREES

Изменения в температурном режиме почвы являются одним из самых важных компонентов микроклимата почвы и оказывают значительное влияние на изменение свойств почвы и развитие растений. В этом исследовании, температура почвы и значения теплопроводности определялись на двух различных полях, которые покрыты травой, и затемненных участках под персиковыми деревьями. Теоретические значения температуры почвы, полученные из решения уравнения теплопроводности сравнили с экспериментальными значениями температуры почвы. Полевые исследования проводились на поле фермы в Турции, Самсун, округ Чаршамба, Есилирмакском районе (36 ° 43,380' к востоку, 41° 13,061' к северу) в период с августа по сентябрь 2011 года. Средняя температура почвы на первом экспериментальном поле, покрытом травой, в 7:00, 12:00, 18:00 часов были определены как 19,5° С; 28,4° С; 23,4 ° С на поверхности почвы, 20,2° С; 26,9° С; 23,3° С на глубине 10 см, 20,7° С; 26,0° С; 23,1° С на 20 см, 21,1° С; 25,3° С, 22,9° С на глубине 30 см и 21,4° С; 24,9° С; 22,9° C при глубине почвы 40 см, соответственно. Средняя температура почвы на втором опытном поле в тени персиковых деревьев в 7:00, 12:00, 18:00 часов была 19,4° С; 24,7° С; 22,5° С на поверхности почвы, 20,3 ° С; 24,5° С; 22,7° С на глубине 10 см, 20,8° С; 24,1° С; 22,6° С на глубине 20 см, 21,1° С; 23,7° С; 22,4° С на 30 см и 21,0° С; 23,5° С; 22,2° С на глубине почвы 40 см, соответственно. Средняя проводимость температуры на 1-м опытном поле в слое почвы от 0 до 40 см была 0.460 cm² s^-1; 0.029 cm² s^-1 и 0.167 sm² s^-1 в 700, 1200 и 1800 часов соответственно. Средняя проводимость температуры на 2-м опытном поле в почвенном слое от 0 до 40 см была 0.234 cm² s^-1; 0.115 cm² s^-1 и 1.677 cm² s^-1 в 7:00, 12:00 и 18:00 часов соответственно. Средние относительные погрешности между расчетными результатами с использованием решения уравнения теплопроводности и экспериментальными измерениями температуры были 0,089 на поверхности почвы и 0,055 на глубине почвы 20 см. Сравнение экспериментальных измерений температуры с расчетными значениями температуры показали, что исходное абсолютное решение уравнения теплопроводности в течение короткого периода (< 3 дня) дает гораздо лучшие периодические тепловые изменения на поверхности почвы и в слоях почвы.

soil temperature, thermal diffusivity, heat conductivity equation, measured and estimated temperatures

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