中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > Phosphorus accumulation and leaching risk of greenhouse vegetable soils in Southeast China 土壤圈(英文版) 2021,31 (5)
Position: Home > Articles > Phosphorus accumulation and leaching risk of greenhouse vegetable soils in Southeast China Pedosphere 2021,31 (5)

Phosphorus accumulation and leaching risk of greenhouse vegetable soils in Southeast China

作  者：
Yusef Kianpoor Kalkhajeh;Biao Huang;Helle Sørensen;Peter E. Holm;Hans Christian Bruun Hanse
单  位：
Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg DK-1871 C (Denmark); Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg DK-1871 C (Denmark); Sino-Danish Center for Education and Research (SDC), Beijing 101408 (China;Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036 (China); Sino-Danish Center for Education and Research (SDC), Beijing 101408 (China);Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Data Science Lab, Department of Mathematical Sciences, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen East (Denmark); Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China)
关键词：
cm;100;80;s30;s5;subsoil
摘  要：
Over-fertilization has caused significant phosphorus (P) accumulation in Chinese greenhouse vegetable production (GVP) soils. This study, for the first time, quantified profile P accumulation directly from soil P measurements, as well as subsoil P immobilization, in three alkaline coarse-textured GVP soil profiles with 5 (S5), 15 (S15), and 30 (S30) years of cultivation in Tongshan, Southeast China. For each profile, soil samples were collected at depths of 0–10 (topsoil), 10–20, 20–40, 40–60, 60–80, and 80–100 cm. Phosphorus accumulation was estimated from the difference in P contents between topsoil and parent material (60–100 cm subsoil). Phosphorus mobility was assessed from measurements of water-soluble P concentration (PSol). Finally, P sorption isotherms were produced using a batch sorption experiment and fitted using a modified Langmuir model. High total P contents of 1 980 (S5), 3 190 (S15), and 2 330 (S30) mg kg−1 were measured in the topsoils versus lower total P content of approximately 600 mg kg−1 in the 80–100 cm subsoils. Likewise, topsoil PSol values were very high, varying from 6.4 to 17.0 mg L−1. The estimated annual P accumulations in the topsoils were 397 (S5), 212 (S15), and 78 (S30) kg ha−1 year−1. Sorption isotherms demonstrated the dominance of P desorption in highly P-saturated topsoils, whereas the amount of adsorbed P increased in the 80–100 cm subsoils with slightly larger P adsorption capacity. The total P adsorption capacity of the 80–100 cm subsoils at a solution P concentration of 0.5 mg L−1 was 15.7 (S5), 8.7 (S15), and 6.5 (S30) kg ha−1, demonstrating that subsoils were unable to secure P concentrations in leaching water below 0.5 mg L−1 because of their insufficient P-binding capacity.

相似文章

导出引用
计量
文章访问数: 14
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46