Study on correlation among soil dielectric properties and its influencing factors

doi:10.3969/j.issn.1004-1524.2017.10.17

›› 2017, Vol. 29 ›› Issue (10): 1712-1719.DOI: 10.3969/j.issn.1004-1524.2017.10.17

• Environmental Science • Previous Articles Next Articles

Study on correlation among soil dielectric properties and its influencing factors

ZUO Dianyun^{a, b}, TIAN Hao^{a, b}, ZHOU Jincheng^{a, b}, ZHAO Yandong^{a, b, *}

a. School of Technology;
b. Beijing Laboratory of Urban and Rural Ecological Environment, Beijing Forestry University, Beijing 100083, China

Received:2017-03-10 Online:2017-10-20 Published:2017-12-05

Abstract

Abstract: Clay loam in Haidian District, Beijing was selected as research object and the impacts of soil volume moisture content (6%-36%), soil urea content (0-1%), soil bulk density (1.2-2.6 g·cm^-3), temperature (10-50 ℃), salt content (0-0.42%) on soil dielectric properties were explored and analyzed by vector network analyzer NA7300A based on parallel plate technology within the test frequency (40-150 MHz), and estimation model of reactance with soil dielectric properties was built. It was shown that the reactance had good linear relation with soil moisture content at the range of 6%-30% under different test frequencies. The reactance value increased with the increase of moisture content. When the test frequency was 100 MHz, the determination coefficient (R²) of the constructed linearity was higher than 0.97. Urea did not cause the change of reactance value regularly. With the increase of bulk density, soil salinity and temperature, reactance value increased. The multiple linear regression model was established with reactance as the dependent variable and soil moisture content, bulk density, temperature, salt content and test frequency as independent variables, of which the determination coefficient (R²) was 0.92, and the probability (P) was less than the significance level of 0.05. The results showed that the model could be used as estimation model to study the dielectric properties of clay loam in Beijing.

Key words: soil, dielectric properties, test frequency, moisture content, salinity, temperature, bulk density, nitrogen content

CLC Number:

S153.6

ZUO Dianyun, TIAN Hao, ZHOU Jincheng, ZHAO Yandong. Study on correlation among soil dielectric properties and its influencing factors[J]. , 2017, 29(10): 1712-1719.

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Study on correlation among soil dielectric properties and its influencing factors

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