水土保持学报2018，Vol.32Issue(2)：198-203,6.DOI:10.13870/j.cnki.stbcxb.2018.02.029
五台山土壤水稳性团聚体Ca-SOC和Fe(Al)-SOC分布特征
Distribution Characteristics of Ca-SOC and Fe(Al)-SOC in Soil Water-stable Aggregates in Wutai Mountain
摘要
Abstract
In this study,the vertical distributed soils from Wutai Mountain were used as the object,and the subalpine meadow soil (A),mountain meadow soil (B),brown soil (C),leached cinnamon soil (D) and calcareous cinnamon soil (E) were collected from high to low according to the vertical distribution.The distribution characteristics of Ca SOC and Fe(Al)-SOC in soils and all level water-stable aggregates (＞2 mm,2～0.25 mm,0.25～0.053 mm and ＜0.053 mm) were analyzed.The results showed that:From A to E,the content of Ca SOC in soils didn't change significantly,while the content of Fe(Al)-SOC increased firstly and then decreased.With the decrease of aggregates' particle size,the change trend of Ca SOC and Fe(Al)-SOC's content in A was opposite (the former increased firstly and then decreased,the latter decreased firstly and then increased),and decreased firstly and then increased in B.Also,the change trend of Ca SOC and Fe(Al) SOC's content in D was opposite to that of B,which was increased firstly and then decreased.In addition,the Ca-SOC and Fe(Al)-SOC's content in C decreased gradually,while increased gradually in E.The correlation analysis showed that the soils and ＞ 2 mm aggregates had a significant positive correlation between Fe(Al)-SOC and TOC,the correlation coefficient were rsoil=0.898 (P＜0.05) and r＞2 mm =0.978 (P＜0.01).The content of Fe(Al)-SOC in soils and all level aggregates was significantly higher than that of Ca-SOC,and the contents of Ca-SOC and Fe(Al)-SOC in 2～0.25 mm and 0.25～0.053 mm aggregates were significantly positive correlated.Therefore,in Wutai mountain soil,the bonding ability of FeAl bond and the stability of Fe-Al complex were higher than Ca-SOC,besides,the content and distribution ratio of Fe(Al)-SOC in soil and all level aggregates were significantly higher than that of Ca-SOC.关键词
五台山/水稳性团聚体/钙键合有机碳/铁铝键合有机碳Key words
Wutai Mountain/water-stable aggregate/Ca-SOC/Fe(Al)-SOC分类
农业科技引用本文复制引用
李雄飞,刘奋武,樊文华..五台山土壤水稳性团聚体Ca-SOC和Fe(Al)-SOC分布特征[J].水土保持学报,2018,32(2):198-203,6.基金项目
山西省科技攻关项目(20120313011-1) （20120313011-1）
