Soil Organic Matter Quality in Jatropha spp. Plantations in Different Edaphoclimatic Conditions

Freitas, Renato de; Popin, Gustavo Vicentini; Milori, Débora Marcondes Bastos Pereira; Signor, Diana; Drumond, M. A.; Cerri, Carlos Eduardo Pellegrino

doi:10.1590/18069657rbcs20160218

Cited by 5 publications

(5 citation statements)

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“…Some reasons favor soil microbial biomass under native vegetation: a) higher plant diversity and lowest variation in temperature and moisture (Carvalho et al 2018); b) higher organic inputs and better quality and quantity of plant litter (Lopes et al 2010). These results are in agreement with previous studies, which have found higher soil microbial biomass under native vegetation than cropland (Viana et al 2011;Novak et al 2017;Freitas et al 2017). D' Andréa et al (2002 evaluated Brazilian oxisols under different land use and found a decrease of 49 and 73% in the MBC under pastures and cropland, respectively, as compared with native vegetation.…”

Section: Resultssupporting

confidence: 90%

Soil microbial biomass and enzyme activity in six Brazilian oxisols under cropland and native vegetation

Melo

et al. 2020

Bragantia

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Oxisols are important soils that have been converted from native vegetation to croplands, and can affect soil biological properties such as microbial biomass and enzyme activity. Thus, the aim of this study was to evaluate the changes on soil microbial biomass and enzyme activity when native vegetation (NV) was converted to cropland (CL), such as maize or sugarcane in six oxisols from São Paulo state, Brazil. Soil microbial biomass C (MBC) and N (MBN), and the activity of arylsulphatase, dehydrogenase and fluorescein diacetate hydrolysis (FDA) were assessed in samples collected at 0-0.20 m. In general, MBC was higher under NV than CL (about + 40%), while MBN and FDA did not show a consistent pattern between NV and CL. All soils showed higher values of arylsulfatase (increased from 101 to 717%) and dehydrogenase (increased 15 to 220%) under NV than CL. In conclusion, soil microbial biomass C is usually higher under native vegetation than cropland. Arylsulphatase and dehydrogenase were the attributes that presented better differentiation between native and cropped soils.

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Section: Resultssupporting

confidence: 90%

Soil microbial biomass and enzyme activity in six Brazilian oxisols under cropland and native vegetation

Melo

et al. 2020

Bragantia

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“…AR: área de referência; SM8: plantio de soja em cultivo mínimorecente; SM18: plantio de soja em cultivo mínimo -antigo ......................................................................................................... 55 Tabela 13 -Contribuição de Carbono oriundo de plantas de ciclo fotossintético C4 nas áreas de pastagem estudadas em Belterra, PA. AR: área de referência; PN4: pastagem nominal; PM6: pastagem melhorada . ............................................................................................................. 27 Figura 5 -Área plantada (ha) de grãos no município de Belterra, PA entre 2000a 2017 Figura 10 -Grau de humificação da MOS (HFIL) em amostras de solo das áreas de estudo (Belterra, PA AR: área de referência; PN4: pastagem nominal; PM6: pastagem melhorada; SM8: plantio de soja em cultivo mínimorecente; SM18: plantio de soja em cultivo mínimoantigo ..…”

Section: Lista De Tabelasunclassified

“…O melhoramento da pastagem além de aumentar o estoque de C no solo (CERRI et al, 2007;MAIA et al, 2009;BUSTAMANTE et al, 2012;CERRI et al, 2018) também é necessário para melhorar a produtividade. Silva et al (2004) Rosa et al (2005), Favoretto et al (2008), Freitas et al (2017) e Oliveira (2018). Vale ressaltar que o processo de humificação da MOS também está relacionado à condição edafoclimática do local, ao tipo de material de origem, assim como ao manejo aplicado na área (BAYER et al, 2002).…”

Section: Fracionamento Físico Da Mosunclassified

“…Mas é relevante observar que a SM18 apresentou maior HFIL na camada superficial em relação às demais (Figura 3), este resultado sugere que a biomassa incorporada à área é decomposta em maior velocidade devido ao uso dos implementos agrícolas utilizados no cultivo dos grãos, conforme observado também por Freitas et al (2017) e Martins et al (2011).…”

Section: Fracionamento Físico Da Mosunclassified

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Estoque de carbono e qualidade da matéria orgânica do solo em diferentes sistemas agropecuários em Belterra, Amazônia Oriental

Chaves¹

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The aim of this work was to investigate the carbon stock and soil organic matter (MOS) quality after the conversion from forest-pasture and forest-soybean in Belterra-PA. The climate there is hot and humid, and the annual average temperature is 25.3 °C, while rainfall averages are 1943 mm, concentrated between January and June. The soil of the region is classified as very clayey yellow Latosol. In this research we investigated: (i) a soybean areas in minimum tillage with similar managements-18 years old; (ii) a soybean areas in minimum tillage with similar managements-8 years old; (iii) a nominal pasture (implanted four years ago, managed with fire, without soil fertility correction and managed with extensive livestock) and an improved pasture (implanted six years ago, managed with crop rotation and soil fertility correction by a period of three years. Subsequently, it only remained homogeneous pasture, where the beef cattle herd is managed in a rotational system); (iv) an area of dense ombrophylous forest, used as the reference. Soil samples were collected at six different equidistant points every 50 m. Deformed samples were collected from 0-10, 10-20, 20-30, 30-50, 50-80, 80-100 cm depths and undisturbed samples were collect until 50 cm depth. We estimated the carbon content, soil density, carbon stocks and the C:N ratio. Natural abundance of 13C:12C was used to estimate the amount of carbon from grasses incorporated into the soil. The quality of the MOS was evaluated by humification index and by its physical fractionation. The same soil layers from different areas were compared by analysis of variance and Tukey test (5%). Both pastures were compared between them and in relation to forest area and soybean crops were also compared between them and the forest area. Soil bulk density increased significantly after forest to pasture conversion and forest to soybean conversion. The carbon stock accumulated in the 0-50 cm layer and the degree of humification of the MOS did not differ between the areas. This similarity may be the result of the high clay content presented in this soil, which leads to organic matter slow decomposition, even after changes in vegetation cover. On the soybean areas, the carbon management index was lower in the longer cultivated area, indicating a loss of carbon in this soil. On pasture areas, improved pasture incorporated more carbon from C4 plants in the soil in relation to the nominal pasture, reflecting a positive effect of the rational management on this production system.

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“…Análises de variância (ANOVA) foi utilizada para checar os efeitos do manejo de solo sobre a cultura do milho, considerando um delineamento experimental aleatório, com cinco repetições (Cherubin et al, 2016;Freitas et al, 2017;Signor et al, 2018). Todas as análises foram executadas no software estatístico SAS.…”

Section: Análise Estatísticaunclassified

Impacto da braquiária na qualidade de solo e na produtividade de milho safrinha e de soja

Silva¹

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Soil Organic Matter Quality in Jatropha spp. Plantations in Different Edaphoclimatic Conditions

Cited by 5 publications

References 35 publications

Soil microbial biomass and enzyme activity in six Brazilian oxisols under cropland and native vegetation

Soil microbial biomass and enzyme activity in six Brazilian oxisols under cropland and native vegetation

Estoque de carbono e qualidade da matéria orgânica do solo em diferentes sistemas agropecuários em Belterra, Amazônia Oriental

Impacto da braquiária na qualidade de solo e na produtividade de milho safrinha e de soja

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