不同管理方式对黑土农田根际土壤团聚体稳定性的影响

被引：20

作者：

李海波

韩晓增

许艳丽

候雪莹

机构：

[1] 中国科学院东北地理与农业生态研究所海伦农田生态系统国家野外科学观测研究站

来源：

水土保持学报 | 2008年 / 03期

关键词：

土壤有机碳; 根际土壤; 水稳性团聚体; 黑土;

D O I：

10.13870/j.cnki.stbcxb.2008.03.020

中图分类号：

S152.4 [土壤结构];

学科分类号：

摘要：

以长期定位试验为平台,采集草地（GL）、作物轮作（当季作物为大豆,RS）和连作（玉米、大豆、小麦连作,CM,CS,CW）共5个样地的根际土壤样品作为实验处理,通过对根际土壤团聚体稳定性及有机碳含量的研究,旨在阐明不同植被覆盖与作物轮作—连作对土壤团聚体稳定性的影响。结果表明,土壤有机碳以如下顺序递减:GL>CS>CM>RS>CW;土壤全氮含量以如下顺序递减:GL>CS>CM>CW>RS。农田经过20年的生态恢复,植被演替成为草地,土壤有机碳含量比农田各处理平均高出7.8%。水稳性大团聚体(WSA>0.25mm)质量分数以如下顺序递减:GL>CM>RS>CS>CW,草地WSA>0.25mm的质量分数比农田平均高出18.0%。WSA>0.25mm有机碳含量与土壤总有机碳含量呈显著正相关（r=0.89,p<0.05）。从草地到农田各处理WSA>2mm与其WSA>0.25mm的变化趋势基本一致。WSA>2mm有机碳含量与平均重量直径（MWD）呈极显著正相关（r=0.99.p<0.01）,对土壤团聚体的稳定性具有重要作用。根密度与WSA>0.25mm、WSA>2mm质量分数及有机碳含量呈显著或极显著正相关,与MWD的相关性也达极显著水平（r=0.97,p<0.01）,表明植物根系在水稳性大团聚体的形成与稳定过程中起着重要作用。

引用

页码：110 / 115

页数：6

共 9 条

[1]

Extraction and Characterization of Humic Acids and Humin Fractions from a Black Soil of China[J]. XING Bao-Shan, LIU Ju-Dong, LIU Xiao-Bing and HAN Xiao-ZengNortheast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin 150040 (China). Department of Plant, Soil and Insect Sciences, University of Massachusetts, MA 01003 (USA).Pedosphere. 2005(01)

[2] 不同施肥处理对红壤性水稻土微团聚体有机碳汇的影响 [J].

袁颖红 ;

李辉信 ;

黄欠如 ;

胡锋 ;

潘根兴 .

生态学报, 2004, (12) :2961-2966

[3] 红壤侵蚀裸地植被恢复及土壤有机碳对团聚体稳定性的影响 [J].

彭新华 ;

张斌 ;

赵其国 .

生态学报, 2003, (10) :2176-2183

[4]

Dynamics of soil organic carbon and its fractions after abandonment of cultivated wetlands in northeast China[J] . Zhang Jinbo,Song Changchun,Wang Shenmin.Soil ＆ Tillage Research . 2007 (1)

[5]

Change of Organic Carbon Content and Its Fractions in Black Soil under Long‐Term Application of Chemical Fertilizers and Recycled Organic Manure[J] . Xiaozeng Han,Shouyu Wang,Peter L. M. Veneman,Baoshan Xing.Communications in Soil Science and Plant Analysis . 2006 (7-8)

[6]

Physical protection and biochemical quality of organic matter in mediterranean calcareous forest soils: a density fractionation approach[J] . Pere Rovira,V.Ramón Vallejo.Soil Biology and Biochemistry . 2003 (2)

[7]

The role of arbuscular mycorrhizal fungi and glomalin in soil aggregation: comparing effects of five plant species[J] . Matthias C. Rillig,Sara F. Wright,Valerie T. Eviner.Plant and Soil . 2002 (2)

[8]

Influence of dry–wet cycles on the interrelationship between aggregate, particulate organic matter, and microbial community dynamics[J] . Karolien Denef,Johan Six,Heleen Bossuyt,Serita D. Frey,Edward T. Elliott,Roel Merckx,Keith Paustian.Soil Biology and Biochemistry . 2001 (12)

[9]

Change in soil Carbon after land clearing or afforestation in highly weathered lateritic and sandy softs of south-western Australia. Mendham DS O,Counell AM,Grove TS. Agric.Ecosyst.Envi- ron . 2003

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