生态学杂志2017，Vol.36Issue(11)：3036-3042,7.DOI:10.13292/j.1000-4890.201711.004
林农复合对沙地樟子松人工林土壤团聚体、有机碳及微生物生物量碳分配的影响
Allocation of soil aggregates, organic carbon and microbial biomass carbon affected by agroforestry modes in Pinus sylvestris var.mongolica plantations in sandy area
摘要
Abstract
The objective of this study was to assess how agroforestry modes affect allocation of soil aggregates (SA),organic carbon (SOC) and microbial biomass carbon (MBC).We measured the contents of the SA,SOC and MBC in three modes:Pinus sylvestris var.mongolica (PS),P.sylvestris var.mongolica-Arachis hypogaea (PA),P.sylvestris var.mongolica-Setaria italica (PH) in Fujia Forest Farm,Northwest Liaoning.The results showed that (1) the aggregate composition was dominated by particles of 0.053-0.25 mm which accounted for 37％-45％ of the total under the three modes and the proportion of soil aggregates with particles ＞0.25 mm was the highest in the PH.(2) The change pattern of organic carbon content in aggregates with aggregate size was significantly different between the two kinds of agroforestry (P＜0.05).The distribution of organic carbon contents in soil aggregates with the increase of aggregate size exhibited an "upside-down N type" for PA and a "N" type for PH.(3) SOC and MBC in the top-layer soil (0-20 cm) of the three modes were in the order of PH ＞ PS ＞ PA.(4) The SOC accumulation was mainly influenced by the contents of aggregates of 0.053-0.25 mm and ＞ 2 mm.In addition,MBC was significantly correlated with SOC in 0-50 cm soil layer in the PH,but not in the PA.These results indicate that agroforestry modes can affect MBC and SOC contents.关键词
林农复合/土壤团聚体/微生物生物量碳/土壤有机碳Key words
agroforestry mode/soil aggregates/microbial biomass carbon/soil organic carbon引用本文复制引用
郭鑫炜,李志远,秦胜金,周永斌,魏亚伟..林农复合对沙地樟子松人工林土壤团聚体、有机碳及微生物生物量碳分配的影响[J].生态学杂志,2017,36(11):3036-3042,7.基金项目
林业公益行业科研专项(2014043005)和辽宁省科学技术计划项目(20141063)资助. （2014043005）
