TY - JOUR
T1 - Measurement of fertilizer leaching from the root zone using an automated infiltration soil water sampler in an unsaturated sandy field
AU - Higashi, Naoko
AU - Mori, Yasushi
AU - Inoue, Mitsuhiro
N1 - Funding Information:
Acknowledgments. The authors are grateful to Mr. Shingo Yamazaki, Mr. Takayuki Kawai and Dr. Hidetoshi Mochizuki of ALRC, Tottori Univ., for their assistance during the fieldwork and in the use of equipment. We thank Prof. Anthony E. Eneji of ALRC, for critically reviewing this manuscript. This research was supported by Scientific Research (16380159, 16380221) and COE project of Japan Society for Promotion of Science, and the Research Project Promotion Institute, Shimane University, for the Establishment of Center of Excellence for environmental studies of estuaries and coastal lagoon systems.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/12
Y1 - 2005/12
N2 - In sandy fields with vegetable cultivation, fertilizer leaching may occur and it should be well-controlled. The development of a direct soil water sampler is necessary to examine solute transport and fertilizer leaching in the vadose zone, since soil water reflects timely monitoring of data more accurately than groundwater. We developed a Suction-Controlled Flux Sampler to collect infiltration soil water in a sandy soil. In the present study, we monitored fertilizer leaching in an unsaturated sandy field during the rainy season, while evaluating the sampling performance of SCFS for the sampling of infiltration water. SCFS directly collected the infiltration water effectively over a period of several months in the sandy field and recorded the Water-Collecting Efficiency from 92 to 115% under various infiltration conditions during a period of 50 d. WCE was affected by the rainfall intensity as well as by previous rainfall, which enhanced WCE. The results obtained from the use of SCFS and several sensors demonstrated that the amount of leached water remained low as long as irrigation was applied according to the cultivation manual. However, an unexpected heavy rainfall event led to fertilizer leaching. The fertilizer leaching trend was effectively monitored by several sensors inserted into the soils, while detailed analysis of the components was performed after collection by using SCFS. Direct access to infiltration water enabled to examine the infiltration process and detailed variations in the amounts of discharged anions. The sensor-equipped monitoring system together with SCFS is suitable for precise management of fertilizer and irrigation application.
AB - In sandy fields with vegetable cultivation, fertilizer leaching may occur and it should be well-controlled. The development of a direct soil water sampler is necessary to examine solute transport and fertilizer leaching in the vadose zone, since soil water reflects timely monitoring of data more accurately than groundwater. We developed a Suction-Controlled Flux Sampler to collect infiltration soil water in a sandy soil. In the present study, we monitored fertilizer leaching in an unsaturated sandy field during the rainy season, while evaluating the sampling performance of SCFS for the sampling of infiltration water. SCFS directly collected the infiltration water effectively over a period of several months in the sandy field and recorded the Water-Collecting Efficiency from 92 to 115% under various infiltration conditions during a period of 50 d. WCE was affected by the rainfall intensity as well as by previous rainfall, which enhanced WCE. The results obtained from the use of SCFS and several sensors demonstrated that the amount of leached water remained low as long as irrigation was applied according to the cultivation manual. However, an unexpected heavy rainfall event led to fertilizer leaching. The fertilizer leaching trend was effectively monitored by several sensors inserted into the soils, while detailed analysis of the components was performed after collection by using SCFS. Direct access to infiltration water enabled to examine the infiltration process and detailed variations in the amounts of discharged anions. The sensor-equipped monitoring system together with SCFS is suitable for precise management of fertilizer and irrigation application.
KW - Fertilizer leaching
KW - Infiltration water sampling
KW - Monitoring
KW - Sandy field
UR - http://www.scopus.com/inward/record.url?scp=30144445862&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=30144445862&partnerID=8YFLogxK
U2 - 10.1111/j.1747-0765.2005.tb00141.x
DO - 10.1111/j.1747-0765.2005.tb00141.x
M3 - Article
AN - SCOPUS:30144445862
VL - 51
SP - 1023
EP - 1033
JO - Soil Science and Plant Nutrition
JF - Soil Science and Plant Nutrition
SN - 0038-0768
IS - 7
ER -