Incorporation of nitrogen from crop residues into light-fraction organic matter in soils with contrasting management histories

Bending, Gary D.; Turner, Mary K.

doi:10.1007/s00374-008-0326-y

Cited by 9 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inter‐cropping did not strongly influence the LF, and results were similar to those reported by others (Conti et al , 1997; Alvarez et al , 1998a,b; Bending & Turner, 2009), and followed a trend comparable to that of SOC and soil total N (Mensah et al , 2003). The greater C:N ratio in the inter‐crops suggested that the LF was not readily mineralized compared with that in the single crops.…”

Section: Discussionsupporting

confidence: 89%

Evaluating soil carbon and nitrogen dynamics in recently established maize‐soyabean inter‐cropping systems

Oelbermann

Echarte

2010

European J Soil Science

View full text Add to dashboard Cite

The Pampa comprises the most productive land in Argentina, but the widespread adoption of sole cropping has drastically reduced soil organic carbon (SOC) stocks. This paper presents baseline data on the effects of maizelegume inter-crops compared with maize and soyabean sole crops on SOC and nitrogen (N) stocks, gross SOC turnover, soil microbial biomass (SMB), soil organic matter light fraction (LF) and the partitioning of carbon (C) derived from C 3 -and C 4 crops into SOC, LF and SMB. For soil characteristics, only the C:N ratio was significantly different (0-120 cm) between treatments. Gross SOC and SMB-C turnover time (0-120 cm) was faster in the maize sole crop followed by the inter-crops and the soyabean sole crop. The SMB-C and N were significantly greater in the intercrops. Soil LF-N (0-20 cm) was significantly smaller in the inter-crop. Soil became significantly enriched (0-120 cm) in δ 15 N in the inter-crop, suggesting that microbial decomposers incorporated C derived from maize and soyabean residues. The greatest proportion of C in the soil and in the soil LF was derived from a C 4 -C source, and the δ 13 C of the SMB (0-20 cm) was enriched compared with that of the SOC and the soil LF. Results from this study indicated that after only 1 year of inter-cropping, soil biological and chemical characteristics were influenced positively by this land management practice.

show abstract

Section: Discussionsupporting

confidence: 89%

Evaluating soil carbon and nitrogen dynamics in recently established maize‐soyabean inter‐cropping systems

Oelbermann

Echarte

2010

European J Soil Science

View full text Add to dashboard Cite

show abstract

“…The light fraction C is thought to be an early indicator of soil quality improvement and C sequestration because it is more sensitive than total soil organic C to land-use and management practices (Six et al, 2002;Bending and Turner, 2009). Soon et al (2007) found that the light fraction C contents showed a marked response to tillage after 4 years, whereas the effect of tillage on total soil C was not apparent until the 12 th year.…”

Section: The Role Of the Light Fraction In Carbon Sequestrationmentioning

confidence: 99%

“…For example, the light fraction organic matter, which can be isolated from soil organic matter by flotation, is a plant-like fraction with high C concentration (Tan et al, 2007) and has a relatively short turnover time in the soil (Gregorich et al, 1996). Thus, this fraction is generally considered to be a highly dynamic soil property, and may therefore provide an early indicator of management-induced changes in soil quality (Six et al, 2002;Murage et al, 2007;Bending and Turner, 2009;Wang et al, 2009).…”

mentioning

confidence: 99%

Carbon sequestration in the total and light fraction soil organic matter along a chronosequence in grazing exclosures in a semiarid degraded sandy site in China

Chen¹,

Li²,

Awada³

et al. 2012

Journal of Arid Land

View full text Add to dashboard Cite

Horqin Sandy Land is a fragile, seriously desertified region located in Inner Mongolia of China. Overgrazing is one of the primary drivers of desertification in this region. We investigated whether the establishment of grazing exclosures in areas with active sand dunes enhances soil carbon (C) sequestration and benefits soil recovery. The results showed that soil organic C storage was 1.4, 1.9, and 3.5 times, and light fraction C storage was 2.3, 3.2, and 4.4 times in the 100-cm topsoil after 7, 12, and 25 years of grazing exclusion, respectively, compared to the case in active sand dunes. The light fraction of soil played an important role in soil C sequestration, although it might not change rapidly to provide an early indication of how soil C is increasing in response to grazing exclusion. The results indicated that soils could potentially sequester up to 13.8 Mt C in 25 years if active sand dunes in the study area were to be protected by exclosures. This corresponds to 12.8% of the estimated carbon loss (107.53 Mt) that has been associated with desertification over the past century in the Horqin Sandy Land. Our results suggested that exclosures have the capacity to increase soil C sequestration; however, decades will be required for soil C to recover to historical grassland levels observed prior to desertification.

show abstract

“…The application of a mineral fertiliser is an important measure used to ensure the grain yield (Ying et al 2017). When a mineral fertiliser is applied to increase the crop yield, it will also promote the growth of the entire plant (Bending & Turner 2009), thereby improving the SOC content of the soil (Liu et al 2011). Previous studies found that the SOC content in the 0-20 cm soil layer increased significantly with the long-term application of mineral fertilisers (Guo et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Straw application and soil organic carbon change: A meta-analysis

Wang¹,

Liu²,

Li³

et al. 2021

Soil Water Res.

View full text Add to dashboard Cite

Straw return is considered an effective way to improve the soil organic carbon (SOC) content of farmland. Most studies have suggested that a straw application increases the SOC content; however, some suggest that a straw application reduces the SOC content when used in combination with mineral fertilisation. Therefore, a meta-analysis of the effect of a straw application on the SOC change is needed. This study comprises a meta-analysis of 115 observations from 65 research articles worldwide. Straw applications can significantly increase the proportion of the SOC in the soil. Straw applications caused a significant microbial biomass carbon (MBC) increase in tropical and warm climatic zones. The MBC increase was higher than the SOC increase. For agriculture, the most important soil functions are the maintenance of the crop productivity, the nutrient and water transformation, the biological flora and activity, and the maintenance of the microbial abundance and activity. These functions should be prioritised in order to maintain the SOC function and services. Straw applications should not be excessive, especially when combined with mineral fertilisation, in order to avoid the loss of carbon from the straw in the form of greenhouse gases. A large amount of unused fertiliser also leads to a series of environmental problems.

show abstract

Incorporation of nitrogen from crop residues into light-fraction organic matter in soils with contrasting management histories

Cited by 9 publications

References 26 publications

Evaluating soil carbon and nitrogen dynamics in recently established maize‐soyabean inter‐cropping systems

Evaluating soil carbon and nitrogen dynamics in recently established maize‐soyabean inter‐cropping systems

Carbon sequestration in the total and light fraction soil organic matter along a chronosequence in grazing exclosures in a semiarid degraded sandy site in China

Straw application and soil organic carbon change: A meta-analysis

Contact Info

Product

Resources

About