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| Silva,Davi José; Bassoi,Luís Henrique; Rocha,Marlon Gomes da; Silva,Alexsandro Oliveira da; Deon,Magnus Dall’Igna. |
| ABSTRACT Viticulture is an activity of great social and economic importance in the lower-middle region of the São Francisco River valley in northeastern Brazil. In this region, the fertility of soils under vineyards is generally poor. To assess the effects of organic and nitrogen fertilization on chemical properties and nitrate concentrations in an Argissolo Vermelho-Amarelo (Typic Plinthustalf), a field experiment was carried out in Petrolina, Pernambuco, on Syrah grapevines. Treatments consisted of two rates of organic fertilizer (0 and 30 m3 ha-1) and five N rates (0, 10, 20, 40, and 80 kg ha-1), in a randomized block design arranged in split plots, with five replications. The organic fertilizer levels represented the main plots and the N levels, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertigation; Soil solution; Carbon; Micronutrients; Vitis vinifera. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100503 |
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| Signor,Diana; Deon,Magnus Dall’Igna; Camargo,Plínio Barbosa de; Cerri,Carlos Eduardo Pellegrino. |
| ABSTRACT: Soil organic matter (SOM), which influences chemical, physical and biological soil attributes, is the main form of C found in the soil which can also be used as a soil sustainability index. The aim of this study was to use the quantity and quality of SOM as an indicator to determine the sustainability of different land uses (native vegetation, secondary vegetation, fruit orchards, horticultural areas, degraded pasture, improved pasture, and fields with annual crops) in the eastern Amazon. Improved pasture had higher soil C stock than the other land uses and was similar to the native vegetation, and also presented the highest quantity of C in a stable form in the soil (fraction < 53 μm). According to the C management index, improved pasture is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C stocks; Changes in land use; Physical fractionation; Carbon management index; Microbial biomass. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300225 |
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