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Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China
Yan, WJ; Yin, CQ; Zhang, S
1999-04-01
Source PublicationBIOGEOCHEMISTRY
Volume45Issue:1Pages:1-19
AbstractDuring a two-year held study, an annual nutrient budget and cycles were developed for a small agricultural watershed. The study emphasized the integrated unit of the watershed in understanding the biogeochemistry. It was found that the total nutrient input was 39.1 x 10(4) kg nitrogen and 3.91 x 10(4) kg phosphorus in the year 1995, of which the greatest input of nutrients to the watershed was chemical fertilizer application, reaching 34.7 x 10(4) kg (676 kg/ha) nitrogen and 3.88 x 10(4) kg (76 kg/ha) phosphorus. The total nutrient output from the watershed was 13.55 x 10(4) kg nitrogen and 0.40 x 10(4) kg phosphorus, while the largest output of nitrogen was denitrification, accounting for 44.1% of N output; the largest output of phosphorus was sale of crops, accounting for 99.4% of P output. The results show that the nutrient input is larger than output, demonstrating that there is nutrient surplus within the watershed, a surplus which may become a potential source of nonpoint pollution to area waters.
SubtypeArticle
KeywordChaohu Lake Chemical Fertilizer Cycling Denitrification Multipond System Nitrogen Nutrient Budget Phosphorus
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Geology
WOS KeywordTOTAL PHOSPHORUS ; SOIL ; NITROGEN ; LOSSES
Indexed BySCI
Language英语
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000078939900001
PublisherKLUWER ACADEMIC PUBL
Citation statistics
Cited Times:57[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68218
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYan, WJ
Affiliation1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Geog, Dept Environm Qual, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Yan, WJ,Yin, CQ,Zhang, S. Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China[J]. BIOGEOCHEMISTRY,1999,45(1):1-19.
APA Yan, WJ,Yin, CQ,&Zhang, S.(1999).Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China.BIOGEOCHEMISTRY,45(1),1-19.
MLA Yan, WJ,et al."Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China".BIOGEOCHEMISTRY 45.1(1999):1-19.
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