Study of biochemical and microbiological parameters during composting of pine and eucalyptus bark

Cunha‐Queda, Cristina; Ribeiro, Henrique; Ramos, A.; Cabral, F. M.

doi:10.1016/j.biortech.2006.07.006

Cited by 82 publications

(33 citation statements)

References 31 publications

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“…In particular, β‐GLU is involved in the decomposition of cellulose compounds and is synthesized by soil microorganisms in the presence of suitable substrates. Furthermore, Cunha‐Queda, Ribeiro, Ramos, and Cabral (2007) reported that low activity of β‐GLU in the final stages of composting is one consequence of the decrease in available organic substrates. The values of β‐GLU activity in this study were greater than those reported by several previously cited authors for soil under organic management (Bhat et al., 2017; Cordovil et al., 2017; de Almeida et al., 2015).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of physicochemical properties and enzymatic activity of organic substrates during four crop cycles in soilless containers

Guerra

Sanjuán

López

2018

Food Science & Nutrition

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BackgroundOrganic soilless production in containers requires substrates with appropriate physicochemical and biological properties to ensure that production is sustainable and profitable for several production cycles. The main objective of this study was to comprehensively evaluate these properties in three different mixtures of organic substrates (vermicompost [V] and coconut fibers [CF] in ratios 20V80CF, 40V60CF, 60V40CF) for four horticultural crop production cycles (PCs) using vermicompost tea (VT) as the main source of nutrients.ResultsReadily available water (25%) in the control treatment (20V80CF) was below the recommended limit, and dry bulk density (>450 g/L) surpassed the recommended limit in the 60V40CF treatment (p < 0.05). In terms of chemical properties, cations and anions in the saturated media extract decreased significantly to values below established optimal conditions. Furthermore, the substrates presented high enzymatic activity in successive production cycles (p < 0.05), including dehydrogenase (350–400 μg TFF g−1), acid phosphatase (4,700 μg p‐nitrophenol g−1 soil hr−1), and β‐glucosidase (1,200 μg p‐nitrophenol g−1 soil hr−1) activity during transformation from organic matter to inorganic compounds.ConclusionThe 40V60CF treatment presents adequate physicochemical and biological characteristics for reuse for more than four growing cycles when organic supplements are administered.

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Section: Resultsmentioning

confidence: 99%

Evaluation of physicochemical properties and enzymatic activity of organic substrates during four crop cycles in soilless containers

Guerra

Sanjuán

López

2018

Food Science & Nutrition

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“…Therefore, phytotests using seeds of selected plants, e.g. Lepidium sativum L. or Brasica parachinensis Bailey are one of the most important assays in the assessment of both water extracts and solid fractions of composts [10,23,24]. Plant reaction is not only a response to the chemical composition of the solid and aqueous compost fractions, but also to the presence of microorganisms in these fractions.…”

Section: Introductionmentioning

confidence: 99%

Composts and Water Extracts of Lignocellulosic Composts in the Aspect of Fertilization, Humus-Forming, Sanitary, Phytosanitary and Phytotoxicity Value Assessment

Bohacz

2018

Waste Biomass Valor

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Purpose Lignocellulosic biomass waste is produced in large quantities and only a small part is used for utility purposes. The aim of the work was to assess the fertilization value of the solid fraction and water extract of lignocellulosic composts. Methods Compost I contained 42.86% pine bark, 34.28% grass, 20.0% sawdust and 2.86% chicken feathers; compost II contained 25.54% pine bark, 10.63% wheat straw, 51.07% sawdust and 12.76% chicken feathers. Seldom described physical properties and phytosanitary and sanitary status of composts as well as macro-and micronutrients and heavy metals concentrations were determined in the solid fraction and water extracts of composts and their impact on the germination of Lepidium sativum L. using PC analysis. Results Composts were characterized by good physical properties and a light product, safe phytosanitary status, which was related to the prevalence of potentially antagonistic fungi, especially in compost II. The frequency of Aspergillus fumigatus, considered an opportunistic human pathogen, decreased during the composting. Heavy metal concentrations did not exceed permissible values for improvers and cultivation media in the solid and aqueous compost fractions. The tested composts were sanitary safe. Both composts were non-toxic to plants, because the germination index in compost I was PCA analysis demonstrated that the majority of micro-and macronutrients and heavy metals had a significantly negative effect on root elongation and germination of the test plant (cress) seeds, especially in compost I. Conclusions Lignocellulosic waste after composting is a valuable and safe organic fertilizer.

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“…Phosphatase is one example of a suite of enzymes involved in organic matter degradation and nutrient cycling that can be affected by nutrient loading [18,19]. Urease hydrolyzes long chain peptides into polypeptides and ammonia [20]. Because of the close relationship between enzyme activities with soil microbes and nutrient cycling, it is possible to use the variations in enzyme activities in littoral sediments to reflect changes in both the physical and biological mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

Wang

Yin²,

Wang

2010

CLEAN Soil Air Water

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Land/water ecotones, the transitional boundary zone between terrestrial and aquatic ecosystems, can effectively trap and assimilate nutrients from external sources. The changes of nutrient cycling will cause a response in enzyme activity. In this paper, the enzyme kinetics of land/water ecotones in a shallow eutrophic wetland in China, dominated by a reed (Phragmites australis) community, are studied. The results indicate that land/water ecotones exhibit a strong filtration function and nutrient factor is an important feature affecting the distribution of enzymes in the transect of the littoral zone. The obvious spatial differences of enzyme activities and nutrients are present in the transect of the reed beds. The land area is the hot zone, where significant changes in enzyme activity occur. T-test results show that the landward spot, 1 m away from the water-land interface, is quite different from other spots, and the 1 m spot is the hot spot where great biochemical change happens. The principal component analysis of the environmental variables shows that nutrient factors have an important affect on enzyme distribution in the transect of the littoral zone. The nutrient factor explains about 54% of the observed variance. In particular, TOC (total organic carbon) correlates with the other five factors (TN; total nitrogen, TP; total phosphorus, phosphatase, b-glucosidase, and urease) with correlative coefficients of 0.932, 0.595, 0.488, 0.433, and -0.468, respectively. The results indicate that TOC is a very important factor in Baiyangdian wetlands.

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Study of biochemical and microbiological parameters during composting of pine and eucalyptus bark

Cited by 82 publications

References 31 publications

Evaluation of physicochemical properties and enzymatic activity of organic substrates during four crop cycles in soilless containers

Evaluation of physicochemical properties and enzymatic activity of organic substrates during four crop cycles in soilless containers

Composts and Water Extracts of Lignocellulosic Composts in the Aspect of Fertilization, Humus-Forming, Sanitary, Phytosanitary and Phytotoxicity Value Assessment

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

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