TY - JOUR
T1 - Assessment of long-term phosphorus budget changes influenced by anthropogenic factors in a coastal catchment of Osaka Bay
AU - Wang, Kunyang
AU - Onodera, Shin ichi
AU - Saito, Mitsuyo
AU - Ishida, Takuya
N1 - Funding Information:
We want to appreciate to Dr. Yuta Shimizu and Dr. Shin-ichiro Mishima in NARO in Japan for their useful comments on phosphorus budget in agricultural land. This research has been supported the Asia-Pacific Network for Global Change Research (APN) under Grant No. CRRP2019-09MY-Onodera (funder ID: http://dx.doi.org/10.13039/100005536 ). Research promotion for the environmental creation and rehabilitation of Osaka Bay area by Osaka Bay Regional Offshore Environmental Improvement Center (Project No. 010005 , 020004 , 030003 , PI: Mitsuyo Saito). And Grant-in-Aid for Scientific Research (A) by Japan Society for the Promotion of Science (Project No. 18H04151 , PI: Shin-ichi Onodera).
Funding Information:
We want to appreciate to Dr. Yuta Shimizu and Dr. Shin-ichiro Mishima in NARO in Japan for their useful comments on phosphorus budget in agricultural land. This research has been supported the Asia-Pacific Network for Global Change Research (APN) under Grant No. CRRP2019-09MY-Onodera (funder ID: http://dx.doi.org/10.13039/100005536). Research promotion for the environmental creation and rehabilitation of Osaka Bay area by Osaka Bay Regional Offshore Environmental Improvement Center (Project No. 010005, 020004, 030003, PI: Mitsuyo Saito). And Grant-in-Aid for Scientific Research (A) by Japan Society for the Promotion of Science (Project No. 18H04151, PI: Shin-ichi Onodera). The data that support the findings of this study are available from the corresponding author, upon reasonable request.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/15
Y1 - 2022/10/15
N2 - Phosphorus usage is irreplaceable in agriculture; however, its excessive use leads to wastage of invaluable resources and significant soil surplus. Agronomic soil phosphorus surplus in Asian regions has a much higher level than the global average. And with rapid urbanization and population growth in the recent decades, Asian countries have seen a rise in environmental pollution levels also. This study assessed the detailed phosphorus budget in the Yamato River catchment, an urbanized coastal catchment in Asia, from 1940s to 2010s using Soil and Water Assessment Tool, comprehensively analyzed the effect of anthropogenic factors on long-term phosphorus loading and agronomic soil phosphorus balance. The results showed the peak period of total phosphorus loading and agronomic soil phosphorus surplus occurred in 1970s, at 895 tons/year and 36.6 kg/ha, respectively. The major reasons for increased phosphorus loading and soil surplus during 1940–1970 were rapid population growth and increased fertilizer usage, respectively. Since the 1980s, the construction of wastewater treatment system and reduction in agricultural land contributed to environmental improvement. These anthropogenic factors had a much stronger impact on phosphorus budget than climate change in the study catchment. Soil phosphorus balance is affected by a combination of factors, such as soil properties, fertilizer usage and applied schedule, precipitation event, and crop types. And soil phosphorus surplus may be severely overestimated if the non-point source loss due to precipitation factor is not fully considered.
AB - Phosphorus usage is irreplaceable in agriculture; however, its excessive use leads to wastage of invaluable resources and significant soil surplus. Agronomic soil phosphorus surplus in Asian regions has a much higher level than the global average. And with rapid urbanization and population growth in the recent decades, Asian countries have seen a rise in environmental pollution levels also. This study assessed the detailed phosphorus budget in the Yamato River catchment, an urbanized coastal catchment in Asia, from 1940s to 2010s using Soil and Water Assessment Tool, comprehensively analyzed the effect of anthropogenic factors on long-term phosphorus loading and agronomic soil phosphorus balance. The results showed the peak period of total phosphorus loading and agronomic soil phosphorus surplus occurred in 1970s, at 895 tons/year and 36.6 kg/ha, respectively. The major reasons for increased phosphorus loading and soil surplus during 1940–1970 were rapid population growth and increased fertilizer usage, respectively. Since the 1980s, the construction of wastewater treatment system and reduction in agricultural land contributed to environmental improvement. These anthropogenic factors had a much stronger impact on phosphorus budget than climate change in the study catchment. Soil phosphorus balance is affected by a combination of factors, such as soil properties, fertilizer usage and applied schedule, precipitation event, and crop types. And soil phosphorus surplus may be severely overestimated if the non-point source loss due to precipitation factor is not fully considered.
KW - Fertilizer use
KW - Human impact
KW - Non-point source pollution
KW - Soil and Water Assessment Tool
KW - Soil surplus
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U2 - 10.1016/j.scitotenv.2022.156833
DO - 10.1016/j.scitotenv.2022.156833
M3 - Article
C2 - 35750171
AN - SCOPUS:85132953364
VL - 843
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
M1 - 156833
ER -