Simulação e analise de custos na produção de biodisel a partir de oleos vegetais

Santana, Gean Claudio de Souza; Maciel, Maria Regina Wolf

doi:10.47749/t/unicamp.2008.432208

Cited by 1 publication

(1 citation statement)

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“…To determine the absorption of macronutrients and micronutrients by the grasses in each treatment, the mineral composition of the leaves was measured next, following the methodology of developed by researchers at Embrapa [25]. Based on this analysis, the recovery rate for each nutrient was determined.…”

Section: Methodsmentioning

confidence: 99%

Improved Production of Marandu Palisade Grass (Brachiaria brizantha) with Mixed Gelatin Sludge Fertilization

Ferreira,

de Abreu,

da Silva

et al. 2024

Grasses

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Gelatin industry residues are increasingly used as fertilizer and soil conditioner. However, correct residue dosage is critical for grass development and minimizing environmental impacts. This randomized block design study determined adequate dosage of mixed gelatin sludge (MGS) for Marandu grass production in wet/dry seasons in Brazil. Five MGS levels (0–200% of required nitrogen) were compared to mineral fertilizer. Agronomic/productivity characteristics, bromatological composition, macro/micronutrient composition of leaves, and soil chemical attributes were evaluated. Agronomic/productivity characteristics were influenced by MGS dose in both dry/rainy seasons, except for leaf blade pseudostem ratio and percentage of leaves/pseudostem. Bromatological composition was influenced by MGS doses in dry/rainy seasons except for dry/mineral material quantities. Marandu leaf tissue chemical composition was significantly influenced by MGS dose, except for potassium, boron, and iron. Chemical composition of four soil layers between 0 and 50 cm influenced MGS dose, except for pH, organic matter, magnesium, copper, manganese, and zinc. GMS dose for Marandu production should be 200% of nitrogen requirement. MGS application increased productivity/quality of Marandu grass. Macronutrients (nitrogen, phosphorus) and micronutrients (calcium, magnesium, sulfur, copper, and zinc) increased in Marandu grass and in the soil (calcium, sulfur, and sodium). The increased sodium level was not limiting.

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Section: Methodsmentioning

confidence: 99%