Cumulative effects of nitrogen additions on litter decomposition in three tropical forests in southern China

被引：18

作者：

Hua Fang

Jiangming Mo

Shaolin Peng

Zhian Li

Hui Wang

机构：

[1] The Chinese Academy of Sciences,South China Botanical Garden

[2] Guangzhou Institute of Geography,School of Life Sciences

[3] The Graduate University of Chinese Academy of Sciences,undefined

[4] Sun Yat-sen University,undefined

来源：

Plant and Soil | 2007年 / 297卷

关键词：

N deposition; Litter decomposition; Cumulative effect; Tropical forest;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A field-scale experiment with nitrogen (N) addition treatments was performed in three forest types – a pine (Pinus massoniana Lamb.) forest, a pine-broadleaf mixed forest (mixed) and a mature monsoon evergreen broadleaf forest (mature) – in tropical China. Two kinds of leaf litter, Schima superba Chardn. & Champ. and Castanopsis chinensis Hance, were studied using the litterbag technique after more than 2 years of continuous N additions. The objective of this study was to understand the cumulative effect of N addition on litter decomposition in the tropical forests and to determine if the initial effects of N addition changes over time. Results indicated that leaf litter decomposition was significantly faster in the mature forest than in the mixed or pine forests. The mean fraction of mass remaining after 12-months of decomposition was: mature (0.22) < mixed (0.50) < pine (0.51) for the two litters. Nitrogen addition significantly depressed litter decomposition in the pine forest and the mature forest, but had no significant effect in the mixed forest. These results suggest that N deposition has significant cumulative effect on litter decomposition.

引用

页码：233 / 242

页数：9

共 148 条

[1]

Aber JD(1989)Nitrogen saturation in northern forest ecosystem: hypothesis and implications Bioscience 39 378-386

[2]

Nadelhoffer KJ(1998)Nitrogen saturation in temperate forest ecosystems Bioscience 48 921-934

[3]

Steudler P(2004)Microbial enzyme activities in leaf litter, humus and mineral soil layers of European forests Soil Biol Biochem 36 1527-1537

[4]

Melillo JM(1997)Nutritional and plant-mediated controls on leaf litter decomposition of Ecology 78 244-260

[5]

Aber J(2001) species Oecologia 128 94-98

[6]

McDowell W(1986)Combining theory and experiment to understand effects of inorganic N on litter decomposition Scand J For Res 1 359-370

[7]

Nadelhoffer K(1997)Nutrient release from litter and humus in coniferous forest soils, a mini review Environ Rev 5 1-25

[8]

Magill A(1998)Effect of nitrogen deposition on decomposition of plant litter and soil organic matter in forest ecosystems For Ecol Manag 107 159-172

[9]

Berntson G(1995)Long-term decomposition of successive organic strata in an N saturated Scots pine forest soil Biotropica 27 276-289

[10]

Kamakea K(2000)Structure and organic matter dynamics of a human-impacted pine forest in a MAB reserve of subtropical China Ecology 81 2359-2365

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