Changes in soil organic carbon fractions and residence time five years after implementing conventional and conservation tillage practices

Rahmati, Mehdi; Eskandari, Iraj; Kouselou, Mehdi; Feiziasl, V; Mahdavinia, Gholam Reza; Aliasgharzad, Nasser; McKenzie, Blair M.

doi:10.1016/j.still.2020.104632

Cited by 50 publications

(22 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adaptability of the conservation tillage system, such as the residue incorporation and minimum tillage, can increase soil organic matter (SOM), improve soil physical and biological conditions, and prevent soil degradation [14,15]. Conservation tillage, which involves multiple tillage operations, including zero and minimumtillage, has been considered as a potential measure to reduce structure degradation, minimize the loss of organic matter, and ultimately improve soil quality [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zero and Minimum Tillage on Cotton Productivity and Soil Characteristics under Different Nitrogen Application Rates

Khan

Khan²,

Goheer³

et al. 2021

Sustainability

View full text Add to dashboard Cite

Long-term conservation tillage and straw incorporation are reported to improve the soil health, growth, and yield traits of crops; however, little is known regarding the optimal nitrogen (N) supply under conservation tillage with straw incorporation. The present study evaluated the effects of conservation tillage practices (ZTsas: zero tillage plus wheat straw on the soil surface as such, and MTsi: minimum tillage plus wheat straw incorporated) and different N application rates (50, 100, 150, and 200 kg ha−1) on the yield and quality traits of cotton and soil characteristics in a five-year field experiment. The results showed that ZTsas produced a higher number of bolls per plant, boll weight, seed cotton yield, 100-seed weight, ginning out-turn (GOT), fiber length, and strength than MTsi. Among different N application rates, the maximum number of bolls per plant, boll weight, seed cotton yield, GOT, 100-seed weight, fiber length, strength, and micronaire were recorded at 150 kg N ha−1. Averaged over the years, tillage × N revealed that ZTsas had a higher boll number plant−1, boll weight, 100-seed weight, GOT, fiber length, and strength with N application at 150 kg ha−1, as compared to other tillage systems. Based on the statistical results, there is no significant difference in total soil N and soil organic matter among different N rates. Further, compared to MTsi, ZTsas recorded higher soil organic matter (SOM, 8%), total soil N (TSN, 29%), water-stable aggregates (WSA, 8%), and mean weight diameter (MWD, 28.5%), particularly when the N application of 150 kg ha−1. The fiber fineness showed that ZTsas had no adverse impact on fiber fineness compared with MTsi. These results indicate that ZTsas with 150 kg N ha−1 may be the optimum and most sustainable approach to improve cotton yield and soil quality in the wheat–cotton system.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Zero and Minimum Tillage on Cotton Productivity and Soil Characteristics under Different Nitrogen Application Rates

Khan

Khan²,

Goheer³

et al. 2021

Sustainability

View full text Add to dashboard Cite

show abstract

“…Understanding SOC status and potential will be aided if precise causes of change were identified in terms of shifts in SOC components and microbial activity following intensification and during rehabilitation. Methods for raising SOC need to be tested experimentally in these landscapes [43], since experience in other studies suggest no single approach is likely to work [1,12,39].…”

Section: Discussionmentioning

confidence: 99%

“…Both experience and modelling agree that the conversion of arable to pasture would give the greatest rate of increase in C storage, but other interventions such as short-term leys and cover crops, particularly legume forages [37], could also be effective [1,11,12]. Some practices such as reduced tillage, while raising SOC in some situations [39] may in others alter the depth-distribution of SOC with little increase in the total [40]. Even applying some or all of these changes, the rate of accumulation is likely to decrease year on year before settling at a new equilibrium [41], which might be lower than that before the original decline due to intensification [1].…”

Section: Soil Carbon Zones and Targets For Rehabilitationmentioning

confidence: 95%

Defining Targets for Reversing Declines of Soil Carbon in High-Intensity Arable Cropping

et al. 2020

View full text Add to dashboard Cite

Soil organic carbon (SOC) is declining globally due to intensification of agriculture. Reversing declines should reduce soil erosion, maintain yields, raise the soil’s atmospheric carbon sink, and improve habitat for biodiversity. Commercial fields were sampled in a diverse European Atlantic zone cropland to relate SOC status to cropping intensity and to define a realistic target for restoration. SOC (%C by mass) decreased from 4% to 2% as the proportion of high-intensity crops increased from zero to 55% (linear regression, F pr. < 0.001). In further sampling in and around high-intensity fields, mean SOC increased from 2.4% in cultivated soil to 3.3% in field margins and 4.8% in nearby uncultivated land (F pr. < 0.001). Three broad zones of SOC in close spatial proximity were then defined: 1) high-intensity arable from 1% to 3%, 2) mid-intensity arable and arable-grass from 3% to 5% and 3) uncultivated and semi-natural land from 5% upwards. C:N ratio was constrained around 12, unaffected by cropping intensity, but slightly lower in fields than in margins and uncultivated land (F pr. < 0.001). A feasible target SOC of just above 3% was defined for high-intensity sites. There should be no biophysical obstacle to raising SOC above 3% in the high-input sector. Results argue against treating cropland of this type as uniform: assessment and restoration should be implemented field by field.

show abstract

“…According to the SOC saturation theory, SOC firstly accumulates in fine particles. When the soil has a relatively low clay content and rich organic matter sources, and the quantity of organic matter combined with clay reaches saturated firstly, and then organic matter begins to accumulate in coarse particles (Rahmati et al 2020). Therefore, the increment of carbon sequestration for particles of <0.05 mm was higher than aggregates and coarser particles during vegetation restoration.…”

Section: Carbon Sequestration Effects Of Different Soil Particlesmentioning

confidence: 99%

Long‐term vegetation restoration increases carbon sequestration of different soil particles in a semi‐arid desert

et al. 2021

View full text Add to dashboard Cite

show abstract

Changes in soil organic carbon fractions and residence time five years after implementing conventional and conservation tillage practices

Cited by 50 publications

References 42 publications

Effect of Zero and Minimum Tillage on Cotton Productivity and Soil Characteristics under Different Nitrogen Application Rates

Effect of Zero and Minimum Tillage on Cotton Productivity and Soil Characteristics under Different Nitrogen Application Rates

Defining Targets for Reversing Declines of Soil Carbon in High-Intensity Arable Cropping

Long‐term vegetation restoration increases carbon sequestration of different soil particles in a semi‐arid desert

Contact Info

Product

Resources

About