森林与环境学报Issue(1)：31-37,7.DOI:10.13324/j.cnki.jfcf.2015.01.006
邓恩桉林土壤腐殖质对模拟硫、氮复合沉降的响应
Responses of humus compositions to sulfur and nitrogen complex simulated depositions in an artificial young Eucalyptus dunnii plantation
摘要
Abstract
To explore the response mechanisms of plantation ecosystems to acid deposition in red soil areas , the experiment about the simulation of sulfur ( S) and nitrogen ( N) complex depositions was carried out in an artificial young Eucalyptus dunnii plantation in July, 2009.It was studied by the quadratic rotating orthogonal regression design principle , and the humus compositions in soil aggregates were tested after one year simulated depositions .The One-Way ANOVA between 17 treatments showed that under the 1 a simulated S and N deposition the variances of humus carbon content , humic acid carbon content and fulvic acid carbon content were significantly different in soil grain sizes lower than 0.25 mm, while humin carbon content and the ratio of humic acid carbon content and fulvic acid carbon content were significantly different in 0.25-1 mm grain sizes, but none of variance differences of five humus composition were significant in 1 -2 mm grain sizes at P <0.05.Those compositions in five significantly different groups were chosen to be analyzed and to establish models, the result showed that the carbon content of humus , humic acid, fulvic acid, humin in treatment groups were decreased compared to the control groups in the same grain sizes , but the ratios of humic acid carbon content and fulvic acid carbon content increased , followed by decrease in some values in red soil aggregates .The main effects of simulated S and N deposition on carbon content of the five kinds of humus components were different to each other factor , and all the interactions of two factors were insignificant .It has been proved that the effects of simulated S and N depositions on humus components in red soil aggregates of plantation ecosystems were dominated by single effect , and the soil fertility under S and N depositions increased followed by decrease, the actual depositions corresponding to the cut-off points were 20.02, 63.70 kg· hm-2· a-1.关键词
邓恩桉/腐殖质成分/硫/氮复合沉降Key words
Eucalyptus dunnii/humus composition/sulfur and nitrogen complex depositions分类
农业科技引用本文复制引用
杜锟,张江勇,林勇明,张广帅,邓浩俊,吴承祯..邓恩桉林土壤腐殖质对模拟硫、氮复合沉降的响应[J].森林与环境学报,2015,(1):31-37,7.基金项目
教育部博士点学科专项基金项目（20123515110011）；福建省科技厅重大专项项目（2012NZ01）。 （）
