Comparison of carbon and nitrogen determination methods for samples of a Paleudult subjected to no-till cropping systems

Dieckow, Jeferson; Mielniczuk, João; Knicker, Heike; Bayer, Cimélio; Dick, Deborah Pinheiro; Kögel‐Knabner, Ingrid

doi:10.1590/s0103-90162007000500011

Cited by 34 publications

(14 citation statements)

References 8 publications

(13 reference statements)

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“…Nevertheless, it is the most widely used method in many laboratories because it is simple, rapid and less expensive and requires minimal equipment. Strong correlation is also found between these two methods regardless of agroecological region, land uses, cropping systems and managements (Dieckow et al ., ; Tivet et al ., ). For soils of the Indian NEHR, the Walkley and Black method has been an acceptable analytical technique to generate SOC data by weight to volume (Bhattacharyya et al ., ).…”

Section: Methodsmentioning

confidence: 96%

Impact of Land Uses, Agrophysical Variables and Altitudinal Gradient on Soil Organic Carbon Concentration of North‐Eastern Himalayan Region of India

et al. 2015

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In the fragile hilly ecosystem of Northeastern Himalayan Region (NEHR) of India, interaction of landuse change and soil organic carbon (SOC) holds significance in sustaining land productivity. However, due to limited data, effect of landuse on SOC inventory at regional level is poorly quantified. Present study assessed the influence of seven major landuses and agro-physical variables (soil texture, bulk density, annual rainfall and mean

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Section: Methodsmentioning

confidence: 96%

Impact of Land Uses, Agrophysical Variables and Altitudinal Gradient on Soil Organic Carbon Concentration of North‐Eastern Himalayan Region of India

et al. 2015

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“…The effect of crop rotation in increasing C stocks, in this soil layer, was probably linked to the cover crop root system. Previously, Dieckow et al (2007) reported that 36 and 63 % of the gain in soil C stocks associated to the use of pigeon pea (Cajanus cajan (L.) Milsp. )/maize and lablab bean (Dolichos lablab L.)/maize, respectively, occurred below 0.175 m depth.…”

Section: Carbon Stocks In Stratified Soil Layersmentioning

confidence: 99%

Carbon stock and its compartments in a subtropical oxisol under long-term tillage and crop rotation systems

Campos

Amado

Bayer

et al. 2011

Rev. Bras. Ciênc. Solo

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Soil organic matter (SOM) plays a crucial role in soil quality and can act as an atmospheric C-CO 2 sink under conservationist management systems. This study aimed to evaluate the long-term effects (19 years) of tillage (CT-conventional tillage and NT-no tillage) and crop rotations (R0-monoculture system, R1-winter crop rotation, and R2-intensive crop rotation) on total, particulate and mineralassociated organic carbon (C) stocks of an originally degraded Red Oxisol in Cruz Alta, RS, Southern Brazil. The climate is humid subtropical Cfa 2a (Köppen classification), the mean annual precipitation 1,774 mm and mean annual temperature 19.2 o C. The plots were divided into four segments, of which each was sampled in the layers 0-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m. Sampling was performed manually by opening small trenches. The SOM pools were determined by physical fractionation. Soil C stocks had a linear relationship with annual crop C inputs, regardless of the tillage systems. Thus, soil disturbance had a minor effect on SOM turnover. In the 0-0.30 m layer, soil C sequestration ranged from 0 to 0.51 Mg ha -1 yr -1 , using the CT R0 treatment as base-line; crop rotation systems had more influence on soil stock C than tillage systems. The mean C sequestration rate of the cropping systems was 0.13 Mg ha -1 yr -1 higher in NT than CT. This result was associated to the higher C input by crops due to the improvement in soil quality under long-term no-tillage. The particulate C fraction Brazil. was a sensitive indicator of soil management quality, while mineral-associated organic C was the main pool of atmospheric C fixed in this clayey Oxisol. The C retention in this stable SOM fraction accounts for 81 and 89 % of total C sequestration in the treatments NT R1 and NT R2, respectively, in relation to the same cropping systems under CT. The highest C management index was observed in NT R2, confirming the capacity of this soil management practice to improve the soil C stock qualitatively in relation to CT R0. The results highlighted the diversification of crop rotation with cover crops as a crucial strategy for atmospheric C-CO 2 sequestration and SOM quality improvement in highly weathered subtropical Oxisols.Index terms: carbon sequestration, no-tillage, conventional tillage, soil management. 0-0,05, 0,05-0,10, 0,10-0,20 e 0,20-0,30 RESUMO: ESTOQUE E COMPARTIMENTOS DE CARBONO EM UM LATOSSOLO VERMELHO SUBTROPICAL SOB DIFERENTES SISTEMAS DE LONGO PRAZO DE PREPARO E ROTAÇÃO DE CULTURAS A matéria orgânica do solo (MOS) desempenha papel relevante na qualidade do solo e pode atuar como dreno de C-CO 2 atmosférico em solos sob sistemas de manejo conservacionista. Este estudo foi realizado com o objetivo de investigar o efeito de longo prazo (19 anos) de sistemas de preparo do solo (PC-preparo convencional e PD-plantio direto) e de rotação de culturas (R0-sucessão de monoculturas, R1-rotação de culturas de inverno e R2-rotação intensiva de culturas) no estoque de carbono (C) orgânico total, particulado e associad...

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“…Indeed, this factor of conversion, which is quite variable (1.35 to 14.1; [54]), has been shown to vary with soil type, mineralogy and soil depth [55,56]. Similarly, dry combustion processes have also resulted in greater N values than the Kjeldahl method [57,58]. Thus, considering this limitation, we were unable to test for the effect of time on soil C, N and CN ratios.…”

Section: Discussionmentioning

confidence: 98%

Effects of Restoration Techniques on Soil Carbon and Nitrogen Dynamics in Florida Longleaf Pine (Pinus palustris) Sandhill Forests

Lavoie

Mack

Hiers

et al. 2014

Forests

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Historic fire suppression and intensive forest management in longleaf pine (Pinus palustris) sandhill forests has resulted in hardwood encroachment and degradation of this fire-dependent ecosystem. Active management is now required to restore native community structure and composition, but little is known about the long-term impacts of typical restoration techniques on ecosystem properties. In 1994, the Longleaf Pine Restoration Project (LPRP) was established in fire-excluded longleaf pine sandhills of Eglin Air Force Base, Florida, to explore the effects of restoration treatments on plant and animal community composition and soil processes. Experimental treatments applied included three hardwood reduction techniques and delayed burn. Reference sites were concurrently monitored. Fifteen years later, we revisited the LPRP plots to determine whether soil processes showed lasting treatment effects. This study showed that there were OPEN ACCESSForests 2014, 5 499 no differences in soil C and N between the reference and the fire-suppressed plots prior to the treatments, suggesting that soil C and N were relatively resistant to degradation. This study also showed that the restoration treatments had a significant effect by reducing soil C, but this effect was only short-lived (<3 years). In addition, a MRPP (multi-response permutation procedure) analysis showed that only the herbicide treatment was still different from the reference plots 15 years after the initial treatments. Thus, this study suggests that repeated fires (or lack of) or hardwood removal treatments have little detectable effect on soil nutrients in these nutrient-poor ecosystems.

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Comparison of carbon and nitrogen determination methods for samples of a Paleudult subjected to no-till cropping systems

Cited by 34 publications

References 8 publications

Impact of Land Uses, Agrophysical Variables and Altitudinal Gradient on Soil Organic Carbon Concentration of North‐Eastern Himalayan Region of India

Impact of Land Uses, Agrophysical Variables and Altitudinal Gradient on Soil Organic Carbon Concentration of North‐Eastern Himalayan Region of India

Carbon stock and its compartments in a subtropical oxisol under long-term tillage and crop rotation systems

Effects of Restoration Techniques on Soil Carbon and Nitrogen Dynamics in Florida Longleaf Pine (Pinus palustris) Sandhill Forests

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