ISWC OpenIR  > 水保所知识产出(1956---)
黄土区不同退耕方式下土壤碳氮的 差异及其影响因素
王志齐1; 杜兰兰1; 赵慢2; 郭胜利1,2,3
2016
Source Publication应用生态学报
Volume27Issue:3Pages:716--722
Abstract

研究植被恢复对土壤碳氮动态的影响,对了解陆地生态系统碳氮循环,应对全球温
室效应具有重要意义.本研究以黄土丘陵区不同人工恢复植被为对象,以农田为参照,分析了
不同人工植被恢复方式对0~100 cm 剖面土壤有机碳( SOC) 和全氮( TN) 含量影响的差异及
其影响因素.结果表明: 退耕还林还草显著提高了土壤的SOC 和TN 含量.退耕后,SOC 和TN
含量均较农田明显提高.0~100 cm 土层SOC 平均含量人工乔木林为农田的1.43 倍,增幅最
大; 其次是人工灌木,为1.36 倍; 最后是人工草地,为1.21 倍.0 ~ 100 cm 土层TN 平均含量人
工乔木林增幅最大,是农田的1.30 倍; 其次是人工草地,为1.21 倍; 而人工灌木增幅最小,为
1.13 倍.与农田相比,人工恢复植被类型间SOC 和TN 含量及细根密度的差异在土壤剖面深度
上表现出不同,人工乔木和灌木最明显,影响深度>100 cm; 草地最小,仅为60 cm.恢复植被的细
根密度、C ∶ N 和凋落物量显著高于农作物,细根密度与SOC、TN 呈显著线性相关( P<0.01) .细
根的质和量以及凋落物量是不同人工恢复植被下SOC 和TN 含量差异的重要影响因素.

Other Abstract

Knowledge of the effect of different vegetation restoration measures on soil organic carbon
( SOC) and total soil nitrogen ( TN) is of importance to better understand carbon and nitrogen cycling
in terrestrial ecosystems and deal with the global greenhouse effect. The differences in SOC and
TN content in 0-100 cm soil profile between different restoration measures and their impact factors
were investigated in the Loess Plateau. The results showed that artificial vegetation restoration led to
a significant increase in both SOC and TN content in the 0-100 cm soil profile compared with that
of cropland. The highest increase in average SOC content was observed in the artificial woodland
( 1.43 times that of the cropland) ,followed by the artificial shrubland ( 1.36 times) and artificial
grassland ( 1.21 times) ; whereas the highest increase in average TN content was observed in the artificial
woodland ( 1. 30 times that of the cropland) ,followed by the artificial grassland ( 1. 21
times) and artificial shrubland ( 1.13 times) . Compared with the cropland,there was a significant
difference in SOC and TN content and fine root density up to a maximum depth of >100 cm in the
artificial woodland and shrubland,but about 60 cm in the artificial grassland. The fine root density,
soil C: N ratio and aboveground litter production of artificial woodland,shrubland and grassland
were significantly higher than that of cropland,and fine root density was significantly linearly corre-lated with SOC and TN ( P<0.01) . The quantity and quality of fine root and litter biomass might be
the dominant factors contributing to the observed difference in SOC and TN contents between the
different artificial vegetation types in the Loess Plateau.

Keyword土壤全氮 土壤有机碳 细根 凋落物 植被类型
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8617
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.西北农林科技大学资源与环境学院
3.中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
王志齐,杜兰兰,赵慢,等. 黄土区不同退耕方式下土壤碳氮的 差异及其影响因素[J]. 应用生态学报,2016,27(3):716--722.
APA 王志齐,杜兰兰,赵慢,&郭胜利.(2016).黄土区不同退耕方式下土壤碳氮的 差异及其影响因素.应用生态学报,27(3),716--722.
MLA 王志齐,et al."黄土区不同退耕方式下土壤碳氮的 差异及其影响因素".应用生态学报 27.3(2016):716--722.
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