Organic carbon in soil physical fractions under different-aged plantations of Mongolian pine in semi-arid region of Northeast China
Organic carbon in soil physical fractions under different-aged plantations of Mongolian pine in semi-arid region of Northeast China
复制标题
东北半干旱区不同树龄蒙古松人工林土壤物理组分有机碳
DOI：
10.1016/j.apsoil.2009.09.003
复制
发表时间：
2010-01-10
影响因子：
4.8
通讯作者：
Liao, Peng-Fei
中科院分区：
文献类型：
--
作者：
Chen, Fu-Sheng;Zeng, De-Hui;Liao, Peng-Fei
为了了解沙地草原造林后表层土壤碳(C)储量的变化，采用物理分级方法对樟子松两个重复时间序列上的全土和不同颗粒组分的C含量和蔗糖酶活性进行了定量研究。蒙古利卡(MonGolica Litv.)东北科尔沁沙地东南部的种植园，中国。草地造林后，表层土壤(0-15 cm)全层碳含量呈下降趋势，随着林木成熟，表土碳含量逐渐升高。一般来说，C浓度的这种变化模式与所有颗粒级分(粘土除外)以及大团聚体和微团聚体都有关。表层土壤碳的格局也受到风蚀和沉积的影响，在森林发展过程中，粉砂和细沙的相对质量显著增加。随着森林的发展，团聚体的形成抵消了植树造林后团聚体的损失，有助于碳的稳定。在这类半干旱地区的沙地造林中，为了提高土壤碳储量，建议尽量减少种植期间对草地植被的破坏。(C)2009爱思唯尔B.V.保留所有权利。
In order to understand the changes of surface soil carbon (C) storage following the afforestation of sandy grasslands, we used physical fractionation procedures to quantify C concentrations and sucrase enzyme activity in bulk soil and different particle fractions along two replicate chronosequences of Mongolian pine (Pinus sylvestris var. mongolica Litv.) plantations in the southeastern Keerqin Sand Lands, Northeast China. Carbon concentration in bulk topsoil (0-15 cm) initially decreased following afforestation of grassland and subsequently increased as the forest matured. In general, this pattern of C concentration changes was associated with all particle-size fractions (except clays) and both macro- and microaggregates. The patterns of topsoil C were also influenced by wind erosion and deposition, with marked increases in the relative mass of silt and fine sand fractions occurring during forest development. The loss of aggregates immediately following afforestation was counteracted by formation of aggregates as the forests developed, contributing to the stabilization of carbon. To enhance soil C storage during afforestation of sandy soils in such semi-arid regions it is recommended to minimize disruption of grassland vegetation during the planting stage. (C) 2009 Elsevier B.V. All rights reserved.