Carbon pools in tree biomass and the soil in improved fallows in eastern Zambia

被引：25
|
作者：
Kaonga, Martin L. [1 ]
Bayliss-Smith, Tim P. [1 ]
机构：
[1] Univ Cambridge, Dept Geog, Cambridge CB4 3EN, England
来源：
AGROFORESTRY SYSTEMS | 2009年 / 76卷 / 01期
关键词：
Carbon pools; Improved fallows; Net organic carbon intake (NOC); Soil organic carbon (SOC); Trees; ORGANIC-MATTER; AGROFORESTRY SYSTEMS; NITROGEN; MAIZE; MANAGEMENT; SEQUESTRATION; PRODUCTIVITY; DYNAMICS;
D O I：
10.1007/s10457-008-9185-7
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
This study quantified tree and soil C stocks and their response to different tree species and clay contents in improved fallows in eastern Zambia. From 2002 to 2003, soil, and destructively harvested two-year old tree, samples were analysed for C. There were significant differences (P < 0.05) in aboveground tree C stocks, and in net organic C (NOC) intake rates across coppicing tree species at Msekera and Kalunga. Aboveground C stocks ranged from 2.9 to 9.8 t ha(-1), equivalent to NOC intakes of 0.8-4.9 t ha(-1) year(-1). SOC stocks in non-coppiced fallows at Kalichero and Msekera significantly differed (P < 0.05) across treatments. SOC stocks to 200 cm depth ranged from 64.7 t C ha(-1) under non-coppicing fallows at Kalunga to 184.0 t ha(-1) in 10-year-old coppicing fallows at Msekera. Therefore, tree and soil C stocks in improved fallows can be increased by planting selected tree species on soils with high clay content.
引用
收藏
页码：37 / 51
页数：15
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