国立研究開発法人 国際農林水産業研究センター | JIRCAS

Spatial and Temporal Distribution of Soil Water Content in Fields under Different Vegetation Conditions Based on TDR Measurements

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

TDR (Time-domain reflectometry) is an advanced method for monitoring the water content in fields. TDR measurements can provide accurate information about vegetation effects on both spatial and temporal soil water distribution. The objective of this study was to examine the effects of vegetation conditions on the distribution of the soil water content. Soil water content was measured to express the spatial distribution in the surface layer (0-0.2 m) in grass, corn, and non-planted fields. Additionally, using the TDR method with multiple probes with different lengths, the measurements were conducted on a temporal basis at 4 depths (0-0.1, 0.1-0.2, 0.2-0.3 and 0.3-0.5 m) to determine the soil-water content profiles in the 3 fields. A significantly higher water content in both the grass and cornfields was found, compared to the non-planted field. Moreover, in the cornfield, we observed that microtopographic features significantly affected the spatial water distribution. The lower the soil water content, the higher the coefficient of variation of the soil moisture content. These results indicated that the effects of the vegetation conditions on the soil water distribution in the fields were significant. From the observation of the temporal soil water profiles in the 3 fields, it was found that soil management, i.e. tillage or no-tillage, was a major factor affecting the profiles.

刊行年月2003-10-01
作成者MIYAMOTO TeruhitoPUTISO MahithonSHIONO TakahiroTARUYA HiroyukiCHIKUSHI Jiro
著者キーワード

electromagnetic wave

Andisol

multiple probes with different lengths

公開者Japan International Research Center for Agricultural Sciences
データ作成日2003-10-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
37
4
開始ページ243
終了ページ248
DOI10.6090/jarq.37.243
権利Japan International Research Center for Agricultural Sciences
言語eng