How important is plant litter to the regulation of mineral-N leaching to streams in winter? An observations-led experimental approach

被引：6

作者：

Riaz, M. ^{[1
]}

Mian, I. A. ^{[1
]}

Cresser, M. S. ^{[1
]}

机构：

[1] Univ York, Dept Environm, York YO10 5DD, N Yorkshire, England

来源：

SOIL USE AND MANAGEMENT | 2011年 / 27卷 / 01期

关键词：

DOC; litter; leaching; NO3-; NH4+; winter; NITROGEN DYNAMICS; MANURE TYPE; LONG-TERM; NITRATE; FOREST; NITRIFICATION; SOILS; BUDGETS; COVER;

D O I：

10.1111/j.1475-2743.2010.00306.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Ammonium-N concentrations were frequently observed to exceed nitrate-N concentrations in an intermittently flowing stream draining acid grassland in North Yorkshire. This prompted the design of a soil microcosm experiment to investigate the role of litter in the leaching of ammonium and nitrate from soil profiles during winter. Drainage water was analysed weekly for N species, pH, mineral acid anions and dissolved organic carbon (DOC) for a period of 11 weeks, while extractable mineral-N was determined after 5 and 11 weeks. The results demonstrate that litter plays an important role in reducing mineral-N leaching in winter months. They also suggest that DOC from the litter participates in mineral-N retention in the soil profiles in winter. Ammonium-N and nitrate-N concentrations measured in the microcosm drainage water are similar to those of the stream.

引用

页码：10 / 17

页数：8

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