文章基本信息

标题：ECOLOGICAL STOICHIOMETRY OF SOIL CARBON, NITROGEN AND PHOSPHORUS IN CULTIVATED LAND AFTER DIFFERENT LENGTHS OF RECLAMATION TIME IN TANG COUNTY
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作者：Cong Xu ; Li Zhao ; Ying Cao 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2020
卷号：29
期号：8
页码：6662-6671
语种：English
出版社：PSP Publishing
摘要：This study investigated the ecological stoichiom etry of soil carbon, nitrogen and phosphorus in low h illy areas. Cultivated land areas in Tang- xian County that had been reclaimed for different lengths of tim e were chosen, and sample plots were selected. The distribution characteristics of soil organic carbon (SOC), total nitrogen (TN ) and total phosphorus (TP) and the stoichiom etric ratios (C:N, C:P and N:P) in the study area were investigated. A fter six years of reclam ation (6a), the nutrient content in the 0-20 cm soil layer was significantly higher than that in the 20-40 cm soil layer. The SOC and TN contents increased w ith reclamation time, whereas the TP content fluctuated. W ith increasing reclamation tim e, the C:N ratio in the soil first increased and then decreased before increasing again. The C:P and N:P ratios in the soil both in itia lly increased and then decreased, reaching a maximum at 15a. The soil TN was significantly positively correlated w ith the SOC content and the C:P ratio, and SOC was positively correlated w ith the N:P ratio (P<0.01). The soil sand content showed an extremely significant negative correlation w ith the N:P ratio (P<0.01) and a significant negative correlation w ith the C:P ratio. The soil clay content was positively correlated w ith the N:P ratio. The results can serve as a reference for the balance and cycling of soil C, N and P, ecological restoration, soil fertilization and agricultural production in low h illy areas w ith sim ilar ecological characteristics.
关键词：Reclamation years;soil carbon;nitrogen and phosphorus;stoichiometric ratio;Taihang Mountain;Tang County