Effects of conservation tillage on soil aggregation and aggregate binding agents in black soil of Northeast China

Zhang, Shixiu; Li, Qi; Zhang, Xiaoping; Wei, Kai; Chen, Lijun; Liang, Wenju

doi:10.1016/j.still.2012.06.007

Cited by 203 publications

(108 citation statements)

References 36 publications

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“…Formation and stabilization of aggregates in soil mainly depend on the amount of biomass input and the rate of organic matter mineralization (Blanco-Canqui and Lal, 2004). Similarly, the increased amounts of 4.0-2.0 mm aggregates in the NT tillage practice was also reported by Zhang et al (2012) and Du et al (2013) in long term experiments. Moreover, Zhang et al (2012) found that the >2.0 mm aggregate size in a clay loam soil was higher under no-tillage in comparison to conventional tillage.…”

Section: Resultsmentioning

confidence: 63%

“…For conventional practices, this may be due to tillage causing the destruction of the aggregates conserving organic matter and in turn the increased temperature and aeration of the soil. Many studies reported that higher SOC contents in aggregates were found in conservation tillage systems in comparison to conventional tillage practices (Pinherio et al, 2004;Bhattacharyya et al, 2009;Zhang et al, 2012;Andruschkewitsch et al, 2014). 9.6 ± 0.7 d 9.5 ± 0.6 c 8.5 ± 0.4 b 9.6 ± 0.6 d CT2…”

Section: Soil Organic Carbon Accumulation In Different Aggregate Sizesmentioning

confidence: 99%

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Effects of long-term tillage systems on aggregate-associated organic carbon in the eastern Mediterranean region of Turkey

Acar¹,

Çeli̇k²,

Günal³

2018

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 28.03.2017 Accepted : 09.08.2017 The stability of aggregates plays a vital role in preserving and long term storing of soil organic carbon (SOC). In this study, the long-term (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014) effects of six tillage systems on aggregate-associated SOC were investigated in a field experiment conducted under Mediterranean conditions. The tillage treatments were; conventional tillage with residue incorporated in the soil (CT1), conventional tillage with residue burned (CT2), reduced tillage with heavy tandem disc-harrow (RT1), reduced tillage with rotary tiller (RT2), reduced tillage with heavy tandem disc harrow fallowed by no-tillage (RNT) for the second crop, and no tillage (NT). The most frequently encountered aggregates in all tillage systems were at 4.0-2.0 mm size and the least frequently found aggregates were 1.0-0.5 mm. The mean weight diameter (MWD) value increased in the NT compared to the conventional tillage practices at the rates of 137% and 204%, respectively at 0-15 cm soil depth. Aggregate-associated SOC contents in 0-15 cm depth were higher under conservation tillage systems. However, the highest SOC at 15-30 cm depth were greater mainly in conventional tillage systems as 9.4% for both CT1 and CT2. The results indicated that conservation tillage systems had greater aggregation and carbon storage at the soil surface.

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Section: Resultsmentioning

confidence: 63%

Section: Soil Organic Carbon Accumulation In Different Aggregate Sizesmentioning

confidence: 99%

Effects of long-term tillage systems on aggregate-associated organic carbon in the eastern Mediterranean region of Turkey

Acar¹,

Çeli̇k²,

Günal³

2018

Eurasian Journal of Soil Science (Ejss)

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“…In contrast, NT can promote soil surface macro-aggregation and improve structural stability due to lower soil disturbance and higher SOC, arbuscular mycorrhizal fungi, and microbial biomass and glomalin, which are more important driving factors for aggregate stability, and consequently enhance C retention (Castro et al, 1998;Blanco-Moure et al, 2012;Zhang et al, 2012Zhang et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

Water-Stable Aggregates and Associated Carbon in a Subtropical Rice Soil Under Variable Tillage

Liu

Chen

et al. 2016

Rev. Bras. Ciênc. Solo

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Tillage systems can influence C sequestration by changing aggregate formation and C distribution within the aggregate. This study was undertaken to explore the impact of no-tillage without straw (NT-S) and with straw (NT+S), and moldboard plow without straw (MP-S) and with straw (MP+S), on soil aggregation and aggregate-associated C after six years of double rice planting in a Hydragric Anthrosol in Guangxi, southwest of China. Soil samples of 0.00-0.05, 0.05-0.20 and 0.20-0.30 m layers were wet-sieved and divided into four aggregate-size classes, >2 mm, 2.00-0.25 mm, 0.25-0.053 and <0.053 mm, respectively, for measuring aggregate associated C and humic and fulvic acids. Results showed that the soil organic carbon (SOC) stock in bulk soil was 40.2-51.1 % higher in the 0.00-0.05 m layer and 11.3-17.0 % lower in the 0.05-0.20 m layer in NT system (NT+S and NT-S) compared to the MP system (MP+S and MP-S), respectively. However, no statistical difference was found across the whole 0.00-0.30 m layer. The NT system increased the proportion of >2 mm aggregate fraction and reduced the proportion of <0.053 mm aggregates in both 0.00-0.05 and 0.05-0.20 m layers. The SOC concentration, SOC stock and humic and fulvic acids within the >0.25 mm macroaggregate fraction also significantly increased in the 0.00-0.5 m layer in NT system. However, those within the 2.00-0.25 mm aggregate fraction were significantly reduced in the 0.05-0.200 m layer under NT system. Straw incorporation increased not only the SOC stock in bulk soil, but also the proportion of macroaggregate, aggregate associated with SOC and humic and fulvic acids concentration within the aggregate. The effect of straw on C sequestration might be dependent on the location of straw incorporation. In conclusion, the NT system increased the total SOC accumulation and humic and fulvic acids within macroaggregates, thus contributing to C sequestration in the 0.00-0.05 m layer.

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“…Establishment of perennial vegetation following cultivation showed the positive effects of root length, microbial biomass, and mycorrhizae on aggregate formation Jastrow et al, 1998;Miller and Jastrow, 1990). Based on much of the experimental work done to date, additional biological factors influence aggregation, including the positive influences of microbial biomass and by-products (Zhang et al, 2012), mycorrhizae (Wilson et al, 2009), and soil fauna such as Collembola (Siddiky et al, 2012a,b) and nematodes . Recent work has shown strong positive links between root biomass and the abundance of nematodes and several taxa of mesofauna (Eisenhauer et al, 2013), suggesting that changes in root biomass alters the structure of soil food webs, changing belowground C cycling and the mean residence time of different SOC pools (Reid et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Factors influencing soil aggregation and particulate organic matter responses to bioenergy crops across a topographic gradient

et al. 2015

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Bioenergy crops have the potential to enhance soil carbon (C) pools fromincreased aggregation and the physical protection of organicmatter; however, our understanding of the variation in these processes over heterogeneous landscapes is limited. In particular, little is known about the relative importance of soil properties and root characteristics for the physical protection of particulate organic matter (POM). We studied short-term (3-year) changes in aggregation and POM-C pools under three cropping systems (switchgrass, a triticale/sorghumdouble crop, continuous corn) replicated across five landscape positions along a topographic gradient in Iowa, USA.We isolated POMassociated with three aggregate fractions (N2mm, 0.25-2mm, and 0.053-0.25mm) to determine the relative influence of ten soil and three root properties. Aggregation increased in all cropping systems andwas greatest under switchgrass; however cropping systemeffectswere not consistent among positions. Total soil organic C stocks did not change, but Cwithin both physically protected (iPOM-C) and unprotected (frPOM) C pools increased. Shifts in iPOM-C were concurrently influenced by soil properties and root traits. Soil texture had the strongest influence (65% relative importance), with finer-textured soils showing greater gains in total iPOM-C, while greater root biomass influenced (35% relative importance) accrual of total iPOM-C. Aggregate fractions varied in their iPOM-C response to soil and root variables, however individual pools similarly showed the importance of soil texture and root biomass and annual root productivity (BNPP). Changes in frPOM-C were strongly correlated with BNPP. Our data suggest that macroaggregate formation drives short-term responses of POM, which are influenced by both soil and root system properties. Crops that maximize root biomass and BNPP will lead to the largest increases in protected soil C stocks. However, C storage rates will vary across landscapes according to soil conditions, with texture as the primary influence. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. Bioenergy crops have the potential to enhance soil carbon (C) pools from increased aggregation and the physical protection of organic matter; however, our understanding of the variation in these processes over heterogeneous landscapes is limited. In particular, little is known about the relative importance of soil properties and root characteristics for the physical protection of particulate organic matter (POM). We studied short-term (3-year) changes in aggregation and POM-C pools under three cropping systems (switchgrass, a triticale/sorghum double crop, continuous corn) replicated across five landscape positions along a topographic gradient in Iowa, USA. We isolated POM associated with three aggregate fractions (N 2 mm, 0.25-2 mm, and 0.053-0.25 mm) to determine the relative influence of ten soil and three root properti...

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Effects of conservation tillage on soil aggregation and aggregate binding agents in black soil of Northeast China

Cited by 203 publications

References 36 publications

Effects of long-term tillage systems on aggregate-associated organic carbon in the eastern Mediterranean region of Turkey

Effects of long-term tillage systems on aggregate-associated organic carbon in the eastern Mediterranean region of Turkey

Water-Stable Aggregates and Associated Carbon in a Subtropical Rice Soil Under Variable Tillage

Factors influencing soil aggregation and particulate organic matter responses to bioenergy crops across a topographic gradient

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