Effects of tillage systems on soil organic carbon dynamics, structural stability and crop yields in irrigated wheat (Triticum aestivum L.)–cotton (Gossypium hirsutum L.) rotation in semi-arid Zimbabwe

Gwenzi, Willis; Gotosa, Jephita; Chakanetsa, S.; Mutema, Z.

doi:10.1007/s10705-008-9211-1

Cited by 76 publications

(51 citation statements)

References 20 publications

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“…MWD and GMD under straw returning plots NTS and CTS were higher than those of other treatments with significant difference in 2015 than 2013. These results are same with another study that MWD was significantly affected by straw returning and no-tillage systems in the top 0-30 cm (Gwenzi et al, 2009). In agreement to our results, Kahlon et al (2013) and Chen et al (2014) In present study, tillage and straw returning plots NTS and CTS treatments significantly increased MWD and GMD values of soil aggregates in both soil depths, but was more obvious at 0-20 cm depth.…”

Section: Mean Weight Diameter and Geometric Mean Diameter Of Soil Aggsupporting

confidence: 93%

“…Similarly also reported in some other studies (Zhou et al, 2007;Zhang et al, 2014). The improvement in the fractal dimensions may have been accelerated by the returned residue retention, which increased aggregate stability, SOC (Gwenzi et al, 2009), and significantly increased aggregate size distribution (Six et al, 2000). Fractal dimensions D can be more strongly affected by the changes in land management and residue management practices in agro-ecosystem.…”

Section: Fractal Dimensionssupporting

confidence: 55%

“…It was mainly because soil microaggregates (< 0.25 mm) consist of small particles, coated with fine organic and inorganic materials. However, macroaggregates (> 0.25 mm) are result of gathering of small particles (Gwenzi et al, 2009). The stability of these soil aggregates affected due to the tillage and residue management practices (Six et al, 2000), macroaggregates were of low stable and persistence because they are weekly cemented by organic residues (Six et al, 2000;Sandoval et al, 2007), such type of soil aggregates could readily disintegrate into smaller units under wet sieving.…”

Section: Aggregate Size Distributionmentioning

confidence: 99%

“…The aggregate stability indices can reflect the changing of soil aggregate size distribution and describe soil aggregate distribution status in many studies (Gwenzi et al, 2009;Paul et al, 2013;Zhang et al, 2014). Aggregates comprise both macroaggregates (> 0.25 mm) and microaggregates (< 0.25 mm) in the hierarchical model of aggregate organization as described by Tisdall and Oades (1982).…”

Section: Introductionmentioning

confidence: 99%

“…Sandoval-Estrada et al (2008) reported that standing residues and chopped residues had better structural stability and a higher proportion of macroaggregates (> 0.25 mm), as well as a significant increase in SOC. Soil aggregation be responsible for physical protection of SOC against rapid decomposition (Blanco-Canqui and Lal, 2004), and soil aggregate formation and stability of soil aggregates is closely linked with SOC storage (Gwenzi et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Integrative effects of no-tillage and straw returning on soil organic carbón and water stable aggregation under rice-rape rotation

Kubar¹,

Li²,

Lu³

et al. 2018

Chil. j. agric. res.

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No-tillage and straw returning are important practices for preserving and improving soil quality for the sustainable management system. The experimental field was established in 2007 with conventional tillage (CT), conventional tillage with straw returning (CTS), no-tillage (NT), and no-tillage with straw returning (NTS) practice in rice (Oryza sativa L.)-rape (Brassica napus L.) cropping system. The soil samples were collected in 2013-2015 from 0-20 and 20-40 cm depth to investigate the effects on soil organic C (SOC), water-stable aggregation (> 5, 5-2, 2-1, 1.0-0.5, 0.25-0.5, and < 0.25 mm), and their stability in paddy soil of the central China. In the last year (2015), the integrative use of no-tillage and straw returning significantly increased SOC content and contribution of the macroaggregates in 0-20 cm and microaggregates in 20-40 cm depth. Compared with CT, SOC content, mean weight diameter (MWD), geometric mean diameter (GMD), and fractal dimensions (FD) under NTS were increased 25%, 21%, 19%, and 12%, respectively, in the 0-20 cm depth. In 20-40 cm depth, the soil micro-aggregates were higher under CTS treatment. Percentages of macroaggregates and microaggregates under NTS were increased 60% and 40% in the 0-20 cm depth. The SOC had positive linear relationship with MWD, GMD, > 5, 2-5, 1-2, and 0.25-0.5 mm aggregates. Thus, long-term combine use of NT with straw returning practices significantly improved SOC and water-stable aggregation. No-tillage and straw returning appeared to be promising and sustainable strategies to conserve SOC sequestration and stable soil aggregates in rice-rape cropping system.

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Section: Mean Weight Diameter and Geometric Mean Diameter Of Soil Aggsupporting

confidence: 93%

Section: Fractal Dimensionssupporting

confidence: 55%

Section: Aggregate Size Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integrative effects of no-tillage and straw returning on soil organic carbón and water stable aggregation under rice-rape rotation

Kubar¹,

Li²,

Lu³

et al. 2018

Chil. j. agric. res.

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Trade‐offs between forage crop productivity and soil nutrients for different ages of alfalfa grassland

et al. 2020

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Obtaining sustainable high yield and suitable soil nutrient management is crucial for cultivate alfalfa grassland. However, the information on the trade-offs between soil nutrient and productivity of alfalfa grassland following long-term cultivation under intensive agricultural management is scare. Six alfalfa grasslands of different ages under a highly intensive agricultural management system were chosen for this study.It was shown that long-term planting of alfalfa reduced soil nutrients overall. In the 0-100, 100-200, and 200-300 cm layers, the highest values of soil organic carbon (SOC), soil total nitrogen (TN), and soil total phosphorus (TP) content were observed in one-year-old alfalfa grassland. SOC, TN, and TP contents in each 100 cm soil layers linearly declined with increasing stand age, and decreasing rates of SOC and TN (4.31 and 0.03 g kg −1 yr −1 ) in the 0-100 cm layer were higher than other two soil layers.The SOC storage (SOC S ) and TN storage (TN S ) in 0-20 cm soil were significantly higher than other soil profiles in six alfalfa grasslands of different ages. SOC S and TN S in 0-100 cm, especially in upper 40 cm soil, decreased over time until the fourth year, and gradually increased in the fifth and sixth years. While in the third and fourth years, productivity reached peak value (3.13 and 3.12 t ha −1 ), and then reduced. Correlation analysis showed productivity was significantly negatively correlated with SOC S and TN S in 0-100 cm soil depth. The decline in soil nutrients affected alfalfa growth and then feedback its productivity, and the optimal stand age of alfalfa grasslands should not be longer than 6 years for the limitation of soil nutrient, especially SOC storage. To acquire sustainable high productivity of artificial alfalfa grassland, our study suggested that more organic and nitrogen/phosphorus fertilizers should be applied to the upper soil layer beginning in the third year after planting.

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Effects of tillage systems on soil organic carbon and some soil physical properties

2022

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Conservation tillage by increasing soil organic carbon can improve soil structure, especially in arid and semiarid regions. In this study, the effects of three tillage systems [conventional (CT), reduced (RT), and no‐till (NT)] in a wheat‐maize crop rotation on soil organic carbon content (SOC) and some physical properties of a clay loam soil were investigated. The field experiment was set up in a randomized complete block design with three replications in the third year in northeastern Iran. Samples of disturbed and undisturbed soil were collected from 0–15 and 15–30 cm depths and analyzed to quantify SOC content, pore size distribution, hydraulic properties, and aggregate stability. SOC was higher in NT than in the RT and CT treatments, due to the use of cover crops (clover) and the retention of crop residues in this system. The highest water‐stable and macro‐aggregate content were also obtained in the NT system. The highest water contents (for most of the matric suctions) were found in the treatments CT and RT, which also had a high total soil porosity. It was found that tillage in CT and RT loosened the soil and thus increased the total porosity. The highest air‐entry value was found in the CT treatment at 15–30 cm depth, which contained the most micro‐aggregates. However, the maximum n‐value (shape parameter of the water retention curve) was obtained in the treatment with the largest pores, that is, NT at a depth of 15–30 cm. X‐ray images of the pore space and pore function data (dmean, dmode, and dmedian) showed that the largest soil pores were found in the NT treatment, probably due to the high SOC in the NT system. The results of this study showed that the effects of tillage systems on soil physical properties are strongly dependent on SOC. Based on the results of this study, the use of a no‐till system with crop rotation that includes cover crops and crop residue retention is recommended to increase soil organic matter and thereby improve soil structural stability in arid and semiarid regions.

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Effects of tillage systems on soil organic carbon dynamics, structural stability and crop yields in irrigated wheat (Triticum aestivum L.)–cotton (Gossypium hirsutum L.) rotation in semi-arid Zimbabwe

Cited by 76 publications

References 20 publications

Integrative effects of no-tillage and straw returning on soil organic carbón and water stable aggregation under rice-rape rotation

Integrative effects of no-tillage and straw returning on soil organic carbón and water stable aggregation under rice-rape rotation

Trade‐offs between forage crop productivity and soil nutrients for different ages of alfalfa grassland

Effects of tillage systems on soil organic carbon and some soil physical properties

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