Productivity and carbon storage in silvopastoral systems with Pinus ponderosa and Trifolium spp., plantations and pasture on an Andisol in Patagonia, Chile

被引：30
作者：
Dube, Francis [1 ]
Espinosa, Miguel [1 ]
Stolpe, Neal B. [2 ]
Zagal, Erick [2 ]
Thevathasan, Naresh V. [3 ]
Gordon, Andrew M. [3 ]
机构：
[1] Univ Concepcion, Dept Silviculture, Fac Forest Sci, Concepcion, Vii Region, Chile
[2] Univ Concepcion, Dept Soils & Nat Resources, Fac Agron, Concepcion, Vii Region, Chile
[3] Univ Guelph, Sch Environm Sci, Guelph, ON N1G 2W1, Canada
来源：
AGROFORESTRY SYSTEMS | 2012年 / 86卷 / 02期
关键词：
C stocks; N storage; Growth; Ponderosa pine; Silvopasture; Volcanic soils; SOIL ORGANIC-CARBON; INTERCROPPING SYSTEMS; SOUTHERN ONTARIO; VOLCANIC SOIL; SEQUESTRATION; NITROGEN; FOREST; RESPIRATION; AGROFORESTS; MANAGEMENT;
D O I：
10.1007/s10457-011-9471-7
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
No information is available about carbon (C) sequestration potentials in ecosystems on Andisols of the Chilean Patagonia. This study was undertaken to measure the size of C stocks in three predominant ecosystems: Pinus ponderosa-based silvopastoral systems (SPS), pine plantations (PPP) and natural pasture (PST), and examine how clover affect tree growth and stocks of soil C. The C contents of trees and pasture were determined by destructive sampling and dry combustion. Soil samples were taken at 0-5, 5-20, 20-40 cm depths in order to determine soil C and N. For PPP and SPS total aboveground tree C was 38.4 and 53.1 kg tree(-1) and belowground was 21.3 and 23.4 kg tree(-1), respectively. Annual diameter increment at breast height was 1 and 2 cm in PPP and SPS, respectively, and was significantly higher in SPS. Trees in SPS, due to lower density and the presence of leguminous pasture, demonstrated enhanced growth and C sequestration. Soil organic C (SOC) stocks at 0-40 cm depth were 193.76, 177.10 and 149.25 Mg ha(-1) in SPS, PST and PPP, respectively. The conversion of PPP to SPS and PST to PPP resulted in an increase of 44.51 Mg ha(-1) and a decrease of 27.85 Mg ha(-1) in SOC, respectively. Favorable microclimatic conditions in relation to air temperature and soil moisture were observed in SPS as well as a synergy between trees and pasture.
引用
收藏
页码：113 / 128
页数：16
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