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水蚀条件下不同土壤氮素和有机质流失规律
引用本文:张兴昌,邵明安.水蚀条件下不同土壤氮素和有机质流失规律[J].应用生态学报,2000,11(2):231-234.
作者姓名:张兴昌  邵明安
作者单位:中国科学院、水利部水土保持研究所,陕西杨陵,712100
基金项目:中国科学院重大资助项目! (KZ951-B1-211),1 997年度“西部之光”项目,国家自然科学基金!(49871049),国家“九五”科技攻关资助项
摘    要:人工模拟施水冲刷试验研究结果表明,随施水冲刷强度的增大,不同土壤硝态氮、铵态氮、有机质和全氮流失加剧,泥沙全氮和有机质富集程度减少;当给不同土壤施等量的硝酸铵时,发现随径流流失化肥的铵态氮和硝态氮分别占施入量的0.9%-3.5%和8.2%-19.7%,硝酸铵主要随径流流失,以泥沙颗粒流失量甚微;土壤侵蚀、有机质和全氮流失量与〉20μm团聚体相关系数分别为-0.8935、-0.7928和-0.815

关 键 词:土壤类型  水蚀  土壤团聚体  有机质流失规律  
修稿时间:1999-04-26

Soil nitrogen and organic matter losses under water erosion
ZHANG Xingchang,SHAO Mingan.Soil nitrogen and organic matter losses under water erosion[J].Chinese Journal of Applied Ecology,2000,11(2):231-234.
Authors:ZHANG Xingchang  SHAO Mingan
Institution:Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100. zhangxc@ms.iswc.ac.cn
Abstract:The results of artificial water-scoured experiment show that with the increase of water-scoured intensity, the losses of nitrate and ammonium in runoff, and those of organic matter and total N in sediment increased greatly, while the enrichment ratios of organic matter and total N in sediment reduced correspondingly. When the soils in gully-hilly loess region were fertilized with same amount of NH4NO3, the ammonium and nitrate loss in runoff was respectively 0.9-3.5% and 8.2-19.7% of the application amount. Nitrate mainly lossed in runoff, not in sediment. The correlation coefficient of soil erosion module, organic matter and total N loss with > 20 microns soil aggregates was -0.8935, -0.7928 and -0.8151, respectively. The content of > 20 microns soil aggregates could be used as an index to differentiate the soil organic matter and total N loss.
Keywords:Soil types  Water  scoured  Soil aggregate  Fertilizer N loss  
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