Soil Aggregate Stability and Aggregate-Associated Carbon Under Different Tillage Systems in the North China Plain

	Soil Aggregate Stability and Aggregate-Associated Carbon Under Different Tillage Systems in the North China Plain
	Du Zhang-liu 1; Ren Tu-sheng 2; Hu Chun-sheng 3; Zhang Qing-zhong 1; Blanco-Canqui, Humberto 4
刊名	Journal of Integrative Agriculture
	2013
卷号	12 期号:11 页码:2114-2123
关键词	tillage systems aggregate stability aggregate-associated C
ISSN号	2095-3119
英文摘要	The inlfuences of tillage systems on soil carbon (C) stocks have been studied extensively, but the distribution of soil C within aggregate fractions is not well understood. The objective of this study was to determine the inlfuences of various tillage systems on soil aggregation and aggregate-associated C under wheat (Triticum aestivum L.) and corn (Zea mays L.) double cropping systems in the North China Plain. The experiment was established in 2001, including four treatments:moldboard plow (MP) with residue (MP+R) and without residue (MP-R), rotary tillage with residue (RT), and no-till with residue (NT). In 2007 soil samples were collected from the 0-5, 5-10, and 10-20 cm depths, and were separated into four aggregate-size classes (>2 000, 250-2 000, 53-250, and<53 μm) by wet-sieving method. Aggregate-associated C was determined, and the relationships between total soil C concentration and aggregation-size fractions were examined. The results showed that NT and RT treatments signiifcantly increased the proportion of macroaggregate fractions (>2 000 and 250-2 000 μm) compared with the MP-R and MP+R treatments. Averaged across all depths, mean weight diameters of aggregates (MWD) in NT and RT were 47 and 20% higher than that in MP+R. The concentration of bulk soil organic C was positively correlated with MWD (r=0.98; P=0.024) and macroaggregate fraction (r=0.96; P=0.036) in the 0-5 cm depth. In the 0-20 cm depth, comparing with MP+R, total C occluded in the>2 000 μm fraction was increased by 9 and 6%under NT and RT, respectively. We conclude that adoption of conservation tillage system, especially no-till, can increase soil macro-aggregation and total C accumulation in macroaggregates, which may improve soil C sequestration in the intensive agricultural region of the North China Plain.
学科主题	农业基础科学 ; 环境科学基础理论
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/16972]
专题	农业环境与可持续发展研究所
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China 3.Chinese Acad Sci, Ctr Agr Resources Res, Inst Genet & Dev Biol, Shijiazhuang 050021, Peoples R China 4.Kansas State Univ, Agr Res Ctr Hays, Hays, KS 67601 USA
推荐引用方式 GB/T 7714	Du Zhang-liu,Ren Tu-sheng,Hu Chun-sheng,et al. Soil Aggregate Stability and Aggregate-Associated Carbon Under Different Tillage Systems in the North China Plain[J]. Journal of Integrative Agriculture,2013,12(11):2114-2123.
APA	Du Zhang-liu,Ren Tu-sheng,Hu Chun-sheng,Zhang Qing-zhong,&Blanco-Canqui, Humberto.(2013).Soil Aggregate Stability and Aggregate-Associated Carbon Under Different Tillage Systems in the North China Plain.Journal of Integrative Agriculture,12(11),2114-2123.
MLA	Du Zhang-liu,et al."Soil Aggregate Stability and Aggregate-Associated Carbon Under Different Tillage Systems in the North China Plain".Journal of Integrative Agriculture 12.11(2013):2114-2123.