Cover crops and no-till effects on physical fractions of soil organic matter

Nascente, Adriano Stephan; Li, Yuncong; Crusciol, Carlos Alexandre Costa

doi:10.1016/j.still.2013.02.008

Cited by 71 publications

(56 citation statements)

References 29 publications

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“…Perennial forages used as cover crops have great potential for C storage and directly influence SOM levels and soil aggregation (Nascente et al, 2013). There are many studies regarding soil aggregation (Castro Filho et al, 2002;Ferreira et al, 2007;Calonego and Rosolem, 2008;Canton et al, 2009;Kasper et al, 2009;.…”

Section: Introductionmentioning

confidence: 99%

Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System

Nascente

Crusciol

2015

Rev. Bras. Ciênc. Solo

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Soil aggregation and the distribution of total organic carbon (toc) may be affected by soil tillage and cover crops. the objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, toc concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NtS) and conventional tillage system (ctS, one plowing and two disking). this was a three-year study with cover crop/rice/cover crop/rice rotations in the brazilian cerrado. A randomized block experimental design with six treatments and three replications was used. the cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow plus ctS, was included as a control. Soil samples were collected at the depths of 0.00-0.05 m, 0.05-0.10 m, and 0.10-0.20 m after the second rice harvest. the treatments under the NtS led to greater stability in the soil aggregates (ranging from 86.33 to 95.37 %) than fallow plus ctS (ranging from 74.62 to 85.94 %). fallow plus ctS showed the highest number of aggregates smaller than 2 mm. the cover crops affected soil bulk density differently, and the millet treatment in the NtS had the lowest values. the cover crops without incorporation provided the greatest accumulation of toc in the soil surface layers. the toc concentration was positively correlated with the aggregate stability index in all layers and negatively correlated with bulk density in the 0.00-0.10 m layer.

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Section: Introductionmentioning

confidence: 99%

Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System

Nascente

Crusciol

2015

Rev. Bras. Ciênc. Solo

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“…The no-till system is considered to the most important for the sustainability of Brazilian agro-ecosystems (Crusciol et al, 2010;Franchini et al, 2012;Nascente et al, 2013). Currently, it is estimated that this system in used in 75% of the area occupied by annual grain cultivations in Brazil (Embrapa, 2015).…”

Section: Introductionmentioning

confidence: 99%

Weed Incidence After Soybean Harvest in No-Till and Conventional Tillage Croprotation Systems in Roraima’s Cerrado

et al. 2017

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The goal of this study was to evaluate the occurrence of weeds after soybean harvest in rotational systems of no-till and conventional tillage in the savannah of Roraima, Brazil. Two simultaneous experiments were conducted in adjacent areas, the first one with no-till soil management system and the second one with the conventional system, with crop rotations for five agricultural years: pearlmillet (2007/2008), soybean (2008/2009), maize (2009/2010), cowpea with maize (2010/2011), soybean (2011/2012) and maize (2012/2013). The used experimental design was the randomized block one with 28 plots, sized 3 x 15 m (45 m2) distributed in 4 blocks. In May 2010, the combined sowing of cowpea and maize was performed, and later, during the same month of 2011 soybean was sown. Thirty days after harvesting, weeds were collected. The botanical classification of species was performed by classes, families, scientific and popular names, as well as comparisons with specialized bibliographies. The evaluated phyto-sociological parameters were: relative frequency (FRR), relative density (DRR), dominance (Do), importance value index (IVI), Sorensen’s similarity index (SI), numbers of individuals (ha-1) and dry mass (%). Among the 37 species found in both planting systems, 60% belonged to the Liliopsida class; Fabaceae and Malvaceae stood out. However, Poaceae, belonging to the Magnoliopsida class, had the highest number of species in both systems. Most weed species were common in both systems.

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“…Despite of the importance of the subject, there are very few studies on this subject in upland rice (Nascente et al, 2013d). Identification of the correct interval between cover crops desiccation and rice sowing could be important to increase its grain yield adjust at NTS.…”

Section: Introductionmentioning

confidence: 99%

“…Identification of the correct interval between cover crops desiccation and rice sowing could be important to increase its grain yield adjust at NTS. This measure may provide greater availability of nutrients, greater presence of straw on the soil surface and less possible release of allelopathic substances to the soil (Weston, 1990;Barbosa et al, 2008, Zaidan & Carreira, 2008Weih et al, 2008;Nascente et al, 2013d).…”

Section: Introductionmentioning

confidence: 99%

Upland rice yield as affected by Brachiaria coverage management

Nascente

Stone

Guimarães

2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TAn important point in no-tillage system is the time between cover crop glyphosate desiccation and rice sowing. This study aimed to verify the effect of Brachiaria ruziziensis management time before rice sowing on rice yield and its components. The experiment was conducted under greenhouse conditions and consisted of four types of B. ruziziensis management: with Brachiaria and with herbicide (WBWH), without Brachiaria shoots and with herbicide (NBWH), without Brachiaria shoots and without herbicide (NBNH), and with Brachiaria and without herbicide (WBNH), at four times: 30, 20, 10, and 0 days, preceding the rice sowing. The amount of B. ruziziensis dry matter increased as the management was done closer to the rice sowing date. The WBWH and WBNH managements (this one causes the lowest rice grain yield) must be done 30 days before rice sowing; while NBWH management must be done ten or more days before rice sowing. On the other hand, NBNH management (this one favors the best rice grain yield) can be done until rice sowing day. Despite some reduction in rice yield caused by the B. ruziziensis management, when it was done at the proper time the rice grain yield was similar to the control (without Brachiaria sowing and without herbicide application).Produtividade do arroz de terras altas em função do manejo da cobertura de Brachiaria R E S U M ONo sistema de plantio direto é importante o tempo entre a dessecação da cobertura com glifosato e a semeadura do arroz. Este estudo objetivou verificar o efeito da época de manejo da Brachiaria ruziziensis antes da semeadura do arroz na produtividade do arroz e seus componentes de produção. O experimento foi conduzido em casa de vegetação, com quatro tipos de manejo da B. ruziziensis: com Brachiaria e com herbicida (CBCH), sem a parte aérea da Brachiaria e com herbicida (SBCH), com Brachiaria e sem herbicida (CBSH) e sem a parte aérea da Brachiaria e sem herbicida (SBSH), em quatro épocas: 30, 20, 10 e 0 dias anteriores à semeadura do arroz. A matéria seca de B. ruziziensis aumentou à medida que o manejo foi realizado próximo à semeadura do arroz. Os manejos CBCH e CBSH (este proporcionou a menor produtividade de arroz) devem ser feitos 30 dias antes da semeadura do arroz; já o manejo SBCH deve ser feito dez ou mais dias antes da semeadura. O manejo SBSH, que proporcionou a maior produtividade de arroz, pode ser feito até o dia da semeadura do arroz. Apesar de alguma redução na produtividade causada pelo manejo da B. ruziziensis, quando ele foi feito no momento adequado a produtividade do arroz foi semelhante ao controle (sem semeadura da Brachiaria e sem herbicida).

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Cover crops and no-till effects on physical fractions of soil organic matter

Cited by 71 publications

References 29 publications

Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System

Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System

Weed Incidence After Soybean Harvest in No-Till and Conventional Tillage Croprotation Systems in Roraima’s Cerrado

Upland rice yield as affected by Brachiaria coverage management

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