Soil physical properties and carbon/nitrogen relationships in stable aggregates under legume and grass fallow

Udom, B. E.; Omovbude, S.

doi:10.1016/j.chnaes.2018.05.008

Cited by 19 publications

(11 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results show that the management adopted in NTS and PP have contributed to the maintenance of the StockC both in surface and subsurface soil layers, a behavior previously observed by other authors (Rosset 2014a;2014b;Rosset et al, 2016;Sales et al, 2018;Assunção et al, 2019;Rosset et al, 2019). This increase in soil StockC in the PP and NTS areas is important for improving soil quality, considering that C directly acts in the reduction of Sd (Velasquez and Lavelle, 2019;Falcão et al, 2020), porosity maintenance (Bertollo and Levien, 2019) as well as in the regulation of water infiltration (Silva et al, 2019), improving microorganism activity (Souza et al, 2018) and providing greater soil aggregation (Ozório et al, 2019;Udom and Omovbude, 2019).…”

Section: Resultssupporting

confidence: 65%

Stock and indices of carbon management under different soil use systems

Morais

Silva

Rosset

et al. 2021

Rev. Bras. Ciênc. Ambient. (Online)

View full text Add to dashboard Cite

The aim of this study was to evaluate the stock of total organic carbon (TOC) and to perform the physical-granulometric fractionation of soil organic matter (SOM) in different management systems (MS). Three MS and one reference area of Native Forest (NF) were studied, and the three systems were sugarcane (SC), permanent pasture (PP) and no-tillage system (NTS). Soil samples were collected in the 0–0.05, 0.05–0.10, 0.10–0.20-m layers. Soil density (Sd), TOC, stratification index (SI), carbon stock (StockC), variation in StockC (∆StockC), carbon content of particulate organic matter (C-POM) and mineral organic matter (C-MOM), carbon stock index (CSI), lability (L), lability index (LI), and carbon management index (CMI) were determined. The MS presented higher Sd than the NF area. The NF area had higher TOC contents in the first layers, reaching 25.40 g kg-1 in the 0–0.05-m layer, with the PP area having higher values than the NF in the 0.10–0.20-m layer. The NF area showed the highest levels of C-POM (15.25 g kg-1) and C-MOM (10.15 g kg-1) in the first layer. In the 0.10–0.20-m layer, the PP and NTS systems were superior to the others. Regarding the C-MOM content, SC and PP showed higher levels in the 0.10–0.20-m layer. The highest CMI values were observed in the NTS and PP areas in the 0.10–0.20-m layer. The MS increased the Sd and reduced the TOC levels. The different MS modified the POM fraction, and the MOM fraction was most impacted by the SC area. The lability of the SOM was altered by the MS in the most superficial layers.

show abstract

Section: Resultssupporting

confidence: 65%

Stock and indices of carbon management under different soil use systems

Morais

Silva

Rosset

et al. 2021

Rev. Bras. Ciênc. Ambient. (Online)

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

“…Mendes et al (1999) reported that mineralizable contents of carbon in differed aggregate-size classes differed under cover crop treatments [28]. Moreover, Udom and Omovbude (2019) showed that grass cover crops improved OC con-tents of macroaggregates in the Guinea soils [5]. However, Veloso et al (2019) reported that the cropping systems with two legume cover crops showed a strong carbon enrichment in the microaggregates of the superficial soil layer as compared to soil with no legume cover crop [14].…”

Section: Discussionmentioning

confidence: 99%

“…These crops are planted in the bare-fallow between two major commodity crops, for example, such as between, corn and soybean, and cotton and corn [1,2]. The vegetation cover by service plants may improve soil biological, physical, and chemical properties [3][4][5]. The cover crops include both legumes and grasses, while these crops may enhance the storage of carbon and nitrogen in the soil, which is important for soil health and crop productivity [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The different soil aggregate-size classes may have different impacts on OC contents. For instance, macro-aggregates demonstrated a greater impact on the OC storage in goosegrass soils, and the micro-aggregates showed a greater impact on storage of OC under Calopogonium plantation [5]. There are also studies that have not reported the impact of cover cropping on OC contents of the soil.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Cover Crop Monocultures and Mixtures on Organic Carbon Contents of Soil Aggregates

et al. 2021

View full text Add to dashboard Cite

Cover crops are considered an integral component of agroecosystems because of their positive impacts on biotic and abiotic indicators of soil health. At present, we know little about the impact of cover crop types and diversity on the organic carbon (OC) contents of different soil aggregate-size classes. In this study, we investigated the effect of cover plant diversity on OC contents of different soil aggregates, such as macro- (<2000–500 μm), meso- (<500–250 μm), and micro-aggregates (<250 μm). Our experiment included a total of 12 experimental treatments in triplicate; six different monoculture treatments such as chickling vetch (Vicia villosa), crimson clover (Trifolium incarnatum), hairy vetch (Vicia villosa), field peas (Pisum sativum), oilseed radish (Raphanus sativus), and mighty mustard (Brassica juncea), and their three- and six-species mixture treatments, including one unplanted control treatment. We performed this experiment usingdeep pots that contained soil collected from a corn-soybean rotation field. At vegetative maturity of cover plants (about 70 days), we took soil samples, and the soil aggregate-size classes were separated by the dry sieving. We hypothesized that cover crop type and diversity will improve OC contents of different soil aggregate-size classes. We found that cover plant species richness weakly positively increased OC contents of soil macro-aggregates (p = 0.056), whereas other aggregate-size classes did not respond to cover crop diversity gradient. Similarly, the OC contents of macroaggregates varied significantly (p = 0.013) under cover crop treatments, though neither monoculture nor mixture treatments showed significantly higher OC contents than the control treatment in this short-term experiment. Interestingly, the inclusion of hairy vetch and oilseed radish increased and decreased the OC contents of macro- and micro-aggregates, respectively. Moreover, we found a positive correlation between shoot biomass and OC contents of macroaggregates. Overall, our results suggest that species-rich rather than -poor communities may improve OC contents of soil macroaggregates, which constitute a major portion of soil systems, and are also considered as important indicators of soil functions.

show abstract

Evaluating soil carbon stability by combining δ13C and soil aggregates after afforestation on agricultural land and thinning management

Zhang

Geng

et al. 2023

Plant Soil

View full text Add to dashboard Cite

Background and AimsAfforestation and thinning management are effective ways to mitigate global warming. The mechanism of soil carbon recovery is effectively explored by linking soil aggregate and isotopic 13 C. MethodsSoil samples were collected from nearby agricultural land (AL) and larch plantations (established in 1965 and thinning in1995, UT: 2500 tree ha − 1 , MT: 1867 tree ha − 1 , and ST: 1283 tree ha − 1 ). The soil was separated into three aggregates (LMAC: >2 mm, SMAC: 2-0.25 mm, MIC: 0.25 − 0.053), minerals associated with organic matter (MAOM: <0.053 mm), and carbon fractions within macroaggregate. ResultsWe found that afforestation on agricultural land signi cantly increased mean weight diameter (MWD).But thinning intensifying decreased MWD resulting from the distribution of LMAC replaced by SMAC.Moreover, after afforestation, the carbon concentration in soil aggregates and MAOM was signi cantly decreased, and the C stability of macroaggregates was weakened, while could be strong after thinning. Thinning decreased the C/N in soil aggregates and MAOM and the effect of thinning intensity on C/N was obvious with the shrinking of particle size. The δ 13 C, controlled by soil aggregates, signi cantly decreased in each soil aggregate after afforestation while increased after thinning. Additionally, the carbon concentrations, C/N and δ 13 C of small-size particles (< 0.25 mm) and the distribution of SMAC are important for soil carbon indicators (SOC, C/N, CO 2 uxes and δ 13 C). ConclusionWe conclude that soil aggregate distribution shows a recovery tendency for soil carbon, suggesting that increasing thinning intensity is bene cial for the accumulation of older carbon and the e ciency of nitrogen in more stable fractions.

show abstract

Soil physical properties and carbon/nitrogen relationships in stable aggregates under legume and grass fallow

Cited by 19 publications

References 22 publications

Stock and indices of carbon management under different soil use systems

Stock and indices of carbon management under different soil use systems

Impact of Cover Crop Monocultures and Mixtures on Organic Carbon Contents of Soil Aggregates

Evaluating soil carbon stability by combining δ13C and soil aggregates after afforestation on agricultural land and thinning management

Contact Info

Product

Resources

About