Soil carbon and nitrogen stocks and physical properties under no‐till and conventional tillage cotton‐based systems in the <scp>B</scp>razilian <scp>C</scp>errado

Souza, Letícia Helena Campos de; Matos, Eduardo da Silva; Magalhães, Ciro Augusto de Souza; Torre, E. R. de La; Lamas, F. M.; Lal, Rattan

doi:10.1002/ldr.3105

Cited by 22 publications

(9 citation statements)

References 62 publications

(81 reference statements)

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“…These results were consistent with those of previous studies in which lower BD values in the upper soil layers were attributed to greater SOC contents and greater root density in the tillage layer as well as greater soil microorganism abundance (De Vos, Van Meirvenne, Quataert, Deckers, & Muys, ; Han et al, ). Significantly lower BDs were observed in the GW and G systems than in the M and GM systems, which was probably attributed to the absence of annual tillage and the input of low‐quality litter (Souza et al, ). In contrast, the GW and W systems received regular tillage, and large amounts of wheat stubble and root as well as the higher stand density of the G system will benefit the litter input (Li et al, ).…”

Section: Discussionmentioning

confidence: 99%

Afforestation and agroforestry enhance soil nutrient status and carbon sequestration capacity in eastern China

Guo

Wang

et al. 2019

Land Degrad Dev

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Afforestation and agroforestry both sequester atmospheric carbon (C) and store C in the soil. However, the response of soil nutrients and soil organic carbon (SOC) to these practices has not been fully examined, especially in deep soil layers. We therefore investigated the effects of afforestation and agroforestry on the nutrient contents and organic carbon (OC) stocks within a 100-cm depth in eastern China. The soil nutrient contents and stoichiometry as well as the SOC contents and stocks exhibited different vertical patterns and varied among the five planting systems.The total nitrogen (TN), total phosphorus (TP), and SOC contents decreased dramatically at a 20-cm depth, and the total potassium (TK) content exhibited a different pattern. Compared with adjacent croplands and nurseries, the forest plantation and agroforestry systems had higher SOC stocks, ranging from 42.9 to 111.6 t·hm −2 in the whole soil profile. The SOC distribution among the depth gradient varied among planting systems, and the topsoil SOC stocks played crucial roles in total SOC storage within a depth of 100 cm in the cropland and nursery systems. The soil pH and bulk density (BD) were negatively correlated with the SOC content, and a significant positive linear relationship occurred between the TN and SOC contents and between the TP and SOC contents. We recommend that combinations of nitrogen (N) and phosphorus (P) fertilizers would benefit SOC storage and improve stabilization in agroforestry and plantation systems.

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Section: Discussionmentioning

confidence: 99%

Afforestation and agroforestry enhance soil nutrient status and carbon sequestration capacity in eastern China

Guo

Wang

et al. 2019

Land Degrad Dev

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“…Such intensive tillage practices have led to the acceleration of soil degradation (Asmamaw, 2017). Conservation agriculture, including minimal tillage, the use of surface residue covers and crop rotation, has received wide attention globally and is believed to improve soil functions (Campos Souza et al, 2018). A study on fine-silty Udic Haplustolls (USDA classification) showed that no tillage (NT) resulted in lower soil bulk density and improved soil aggregation, soil organic carbon (SOC) and the total N (TN) content, at 0-15 cm depth, at the harvest stages of a maize-soybean rotation system (Alhameid, Ibrahim, Kumar, Sexton, & Schumacher, 2017).…”

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confidence: 99%

The effects of eight years of conservation tillage on the soil physicochemical properties and bacterial communities in a rain‐fed agroecosystem of the loess plateau, China

Sun

Wang

et al. 2020

Land Degrad Dev

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Conservation tillage is an alternative to conventional tillage (CT) for addressing the issue of soil degradation, while how it affects soil quality remains unclear. To characterise the temporary and stable effects of 8 years of conservation tillage on soil quality, topsoil (0-20 cm) properties, 16S rDNA-based bacterial community properties and their relationships were analysed. Three tillage practices (CT [as the control], subsoiling tillage [ST] and no tillage [NT]) were compared at the sowing and harvest stages of a continuous winter wheat (Triticum aestivum L.) system. The mean weight diameter of the water-stable aggregate, organic matter, total N/P/K and available K consistently improved with NT at both crop stages, with averages of 26.8, 35.3, 38.5, 29.2, 13.1 and 59.1%, respectively. Similar but lower levels of improvements were observed under ST. Tillage did not significantly affect soil bulk density, penetration resistance and temperature, whereas NT significantly decreased capillary porosity by 7.9% at sowing. At the sowing stage, CT showed higher bacterial α/β-diversity but lower soil water content and abundances of N-cycling bacteria. The physicochemical properties showed significant correlation with the abundances of some genera belonging to Proteobacteria, Nitrospirae and Actinobacteria. After 8 years of experimentation, we found that conservation tillage, especially NT, resulted in stable effects on soil aggregation and nutrient storage. Although soil compaction temporarily decreased after CT, the bacterial community, soil water storage and the aforementioned stable effects were more favourable for soil sustainability under conservation tillage.

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“…However, in the superficial layers (0 -100 mm), the systems with higher soil mobilization (CC and MC) had lower MRP values when compared to NT. Values below 2000 KPa, providing a favorable condition for root development, according to [24], when they affirm that in CC systems, where the surface layer of the soil is periodically revolved, it is common to observe the momentary increase of the macroporosity values, possible reason why areas submitted to the CC have smaller values of MRP in the superficial layer of the soil.…”

Section: Resultsmentioning

confidence: 94%

Soil Mechanical Resistance Penetration after Fifteen Years with Previous Crops and Tillage Systems and Productivity of Green Corn Cob in Northeast Brazil

Pedrotti

Filho

Assunção

et al. 2019

JEAI

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Conservation systems for less soil movement and when associated with previous crops may reduce the effects of soil compaction. The objective of this work was to evaluate soil mechanical resistance penetration (MRP) in different cropping systems associated with previous corn crop after fifteen years. The experimental design was composed of experimental strips with subdivided plots, combining three soils management systems: CC- conventional cultivation, MC- minimum cultivation and NT- no-tillage, and four species of crops antecedent to maize for the production of commercial ears of green corn. In the determination of soil MRP, the electronic penetrometer (FALKER model SoloTrack PLG 5200) was used, with readings up to a depth of 400 mm. The results showed that there was a significant effect on the MRP values of the soil when submitted to the different cropping systems and previous crops at the end of fifteen years. The lowest MRP values were located in the superficial layers in the CC and MC. The NT cultivar system showed higher MRP values, at depth 0-100 mm. At conditions of tableland, after fifteen years, it was observed that the NT system provides better corn productivity levels combined with lower MRP values along the profile.

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Soil carbon and nitrogen stocks and physical properties under no‐till and conventional tillage cotton‐based systems in the Brazilian Cerrado

Cited by 22 publications

References 62 publications

Afforestation and agroforestry enhance soil nutrient status and carbon sequestration capacity in eastern China

Afforestation and agroforestry enhance soil nutrient status and carbon sequestration capacity in eastern China

The effects of eight years of conservation tillage on the soil physicochemical properties and bacterial communities in a rain‐fed agroecosystem of the loess plateau, China

Soil Mechanical Resistance Penetration after Fifteen Years with Previous Crops and Tillage Systems and Productivity of Green Corn Cob in Northeast Brazil

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