scholarly journals UTILIZAÇÃO DE LODO DE ESTAÇÃO DE TRATAMENTO DE ÁGUA RESIDUÁRIA DE CURTUME NOS PARÂMETROS MICROBIOLÓGICOS DO SOLO

2018 ◽  
Vol 10 (Especial) ◽  
pp. 217-222
Author(s):  
Isabella Santander de Souza ◽  
Rita de Cássia Lima Mazzuchelli ◽  
Fabio Fernando de Araujo
Keyword(s):  
Microbial Biomass ◽  
Analysis Of Variance ◽  
Soil Surface ◽  
Basal Respiration ◽  
Soil Parameters ◽  
Tannery Sludge ◽  
Carbon And Nitrogen ◽  
The City ◽  
Different Doses ◽  
Microbiological Properties

The present work has the objective of evaluating the microbiological properties of the soil that presents increasing doses of tannery sludge. The experiment was carried out under greenhouse conditions, located at Campus II - UNOESTE, in the city of Presidente Prudente. The application of different doses of tannery sludge in microbiological soil parameters was evaluated. The study was conducted in 30 pots of 10 kg during the period of one hundred days, after which samples were collected and sent to the laboratory for the soil biological evaluations of carbon and nitrogen of the microbial biomass and basal respiration of the soil. The data were submitted to analysis of variance, and the comparison was made by regression. The application of the dosage of 2 Mg of sludge ha-1 under the soil surface allowed an increase in the carbon and nitrogen of the microbial biomass being efficient. Higher dosages end up reducing the elements in the biomass.

scholarly journals Urochloa Hybrid Submitted to Biostimulant Application in Grazing Simulation

2019 ◽  
Vol 11 (6) ◽  
pp. 556
Author(s):  
Luara Cristina de Lima ◽  
Renato Aurélio Severino de Menezes Freitas ◽  
Leandro Martins Barbero ◽  
Regina Maria Quintão Lana ◽  
Fernanda Carvalho Basso ◽  
...  
Keyword(s):  
Analysis Of Variance ◽  
Block Design ◽  
Minas Gerais ◽  
Randomized Complete Block Design ◽  
Regression Test ◽  
Dead Material ◽  
The City ◽  
Different Doses ◽  
Rate Of Accumulation

The objective of this work was to evaluate the performance of Urochloa hybrid Convert HD364 applied in different doses as a vegetable biostimulant under grazing simulation in intermittent stocking in the city of Uberlândia, Minas Gerais. The treatments consisted of a control (absence of biostimulant) and in 5 doses of biostimulant, 0.25; 0.5; 0.75; 1.0 and 1.25 L ha-1, in a randomized complete block design with 4 replicates. Productive and qualitative parameters were evaluated. The data were submitted to analysis of variance, using for the comparison of means, the Regression test at 5% of significance. The biostimulant promotes an increase in the accumulation of DM and in the rate of accumulation of forage, leaves and stems of Urochloa hybrid and reduction in the percentage of dead material and the L:S ratio of Urochloa hybrid.

scholarly journals Alteration of carbon, nitrogen, and phosphorus stoichiometry and their related enzymes as affected by increased soil coarseness

2016 ◽  
Author(s):  
Ruzhen Wang ◽  
Linyou Lü ◽  
Courtney A. Creamer ◽  
Heyong Liu ◽  
Xue Feng ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Total Nitrogen ◽  
Enzyme Activities ◽  
Microbial Biomass Carbon ◽  
Soil Parameters ◽  
Available Phosphorus ◽  
Carbon And Nitrogen ◽  
Acid Phosphomonoesterase

Abstract. Soil coarseness decreases ecosystem productivity, ecosystem carbon and nitrogen stocks, and soil nutrient contents in sandy grasslands. To gain insight into changes in soil carbon and nitrogen pools, microbial biomass, and enzyme activities in response to soil coarseness, a field experiment of sand addition was conducted to coarsen soil with different intensities: 0 % sand addition, 10 %, 30 %, 50 %, and 70 %. Soil organic carbon and total nitrogen decreased with the intensification of soil coarseness across three depths (0–10 cm, 10–20 cm, and 20–40 cm) by up to 43.9 % and 53.7 %, respectively. At 0–10 cm, soil microbial biomass carbon (MBC) and nitrogen (MBN) declined with soil coarseness by up to 44.1 % and 51.9 %, respectively, while microbial biomass phosphorus (MBP) increased by as much as 73.9 %. Soil coarseness significantly decreased the activities of β-glucosidase, N-acetyl-glucosaminidase, and acid phosphomonoesterase by 20.2 %–57.5 %, 24.5 %–53.0 %, and 22.2 %–88.7 %, respectively. Soil coarseness enhanced microbial C and N limitation relative to P, indicated by the ratios of β-glucosidase and N-acetyl-glucosaminidase to acid phosphomonoesterase (and MBC:MBP and MBN:MBP ratios). As compared to laboratory measurement, values of soil parameters from theoretical sand dilution was significantly lower for soil organic carbon, total nitrogen, dissolved organic carbon, total dissolved nitrogen, available phosphorus, MBC, MBN, and MBP. Phosphorus immobilization in microbial biomass might aggravate plant P limitation in nutrient-poor grassland ecosystems as affected by soil coarseness. We conclude that microbial C:N:P and enzyme activities might be good indicators for nutrient limitation of microorganisms and plants.

scholarly journals Variation in Soil Chemical and Microbiological Properties as a Result of Yearly Amendment with Organic Fertilizer

2018 ◽  
pp. 1-7
Author(s):  
O. A. Babalola ◽  
M. O. Adigun ◽  
I. O. Abiola
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Fertility ◽  
Organic Fertilizer ◽  
Organic Fertilizers ◽  
Project Work ◽  
Microbial Biomass C ◽  
Soil Parameters ◽  
Microbial Biomass Nitrogen ◽  
Microbiological Properties

Millions of organic fertilizers are produced annually all over the world. Substantial quantities of these were crop residues and the remaining being animal waste based. Meanwhile maintaining and improving soil fertility in the tropic is essential for increasing food production for rapidly expanding the population. This project work, therefore, investigated the variation in soil chemical and microbiological properties as a result of yearly amendment with compost. The experimental site was the Organic Agricultural Farm located within the Federal University of Agriculture, Abeokuta. Soil samples were collected between 0 – 15 cm depth using soil auger and the samples were analyzed for the following soil parameters; total viable counts, total fungal counts, microbial biomass carbon, microbial biomass nitrogen, percentage organic carbon, microarthropod counts and earthworm counts. The experiment was a split-plot design using 2 varieties of tomato x 3 levels of compost and two durations of application. The variations include one improved variety (UCB 8) and a local variety (Beske), rate of compost – (0, 10, and 20) kg/ha and years of application (one and two years). Results generally showed that: duration has a significant effect on viable counts, microarthropod counts, microbial biomass P, microbial biomass C and percentage organic carbon but has no significant effect on fungal counts, microbial biomass nitrogen, and earthworm counts. The results indicate that application of compost manure is the preferred option to enhance SOM accumulation, improve soil fertility and quality, and increase tomato yield.

scholarly journals Chemical and microbiological changes in the soil mediated by different vegetative coverings in a Natal orange orchard

2022 ◽  
Vol 43 (1) ◽  
pp. 331-350
Author(s):  
Gabriel Danilo Shimizu ◽  
◽  
Jean Carlo Baudraz de Paula ◽  
Adriana Pereira da Silva ◽  
Camilla de Andrade Pacheco ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Basal Respiration ◽  
Poncirus Trifoliata ◽  
Vegetative Development ◽  
Carbon And Nitrogen ◽  
Significant Difference ◽  
Microbiological Parameters ◽  
Spontaneous Vegetation ◽  
Chemical Attributes ◽  
Orange Orchard

Proper soil cover management for citrus cultivation can contribute to increased productivity and improved soil quality. This study examined five different vegetative coverings [Urochloa brizantha; U. decumbens, U. ruziziensis, spontaneous vegetation, and herbicide application (glyphosate) in the total area] in the inter rows of a Natal orange orchard [Citrus sinensis (L.) Osbeck] grafted on the Swingle citrumelo (C. paradisi × Poncirus trifoliata). Their effects on the microbiological and chemical attributes of the soil and the vegetative development in the orchard were examined. Chemical (Ca2+, Mg2+, K+, P, pH, H+Al, CECpH7, base saturation, and OM) and microbiological (carbon and nitrogen of microbial biomass, basal respiration, and metabolic quotient) soil attributes in the rows and inter-rows were evaluated for the orchard in 2018 and 2019. There was a significant difference for most variables in the 2 years studied, emphasizing 2019 for microbiological parameters and OM, with the latter being 14.8% lower in the treatment with glyphosate in the total area compared to the treatment with spontaneous vegetation. The results showed the benefits of vegetation cover with brachiaria in inter-rows of the Natal sweet orange orchard in the chemical and microbiological attributes of the soil, especially in carbon and nitrogen of the microbial biomass.

scholarly journals Changes of Soil Microbiological Properties during Grass Litter Decomposition in Loess Hilly Region, China

2018 ◽  
Vol 15 (9) ◽  
pp. 1797
Author(s):  
Yun Xiang ◽  
Shaoshan An ◽  
Man Cheng ◽  
Lijun Liu ◽  
Ying Xie
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Soil Microbial Biomass ◽  
Change Rate ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
Microbial Carbon ◽  
Microbiological Properties

Litter, the link between soil and plant, is an important part of nutrient return to soil. Deeply understanding the effect of litter decomposition on soil microbiological properties is important for the sustainable development of grasslands. Three plants (Thymus quinquecostatus Celak., Stipa bungeana Trin. and Artemisia sacrorum ledeb.) leaf litter were selected. A simulation experiment using the nylon bag method was conducted to measure the soil microbial biomass carbon and nitrogen, and soil enzyme activity during litter decomposition. The results showed that the decomposition of three leaf litter enhanced soil microbial carbon and nitrogen. The change rate of soil microbial carbon and nitrogen decreased as Ar.S > St.B > Th.Q. The activities of soil invertase, soil urease, and soil nitrate reductase were significantly improved by the coverage of leaf litter. After 741-day litter decomposition, the change rate of soil invertase was from 16.7% to 33.2%. The change rate of soil urease was highest in the Th.Q treatment; St.B treatment and Ar.S treatment followed, and lowest in the control. The change rates of soil nitrate reductase in the St.B and Ar.S treatment were >1000% higher than those of other treatments. The response of soil enzyme activity to litter decomposition “lagged” behind the change of soil microbial biomass. The significant increase of soil microbial biomass and enzyme activity demonstrated that litter decomposition played an important role in maintaining soil ecological function.

scholarly journals Microbial responses to doses of cover plant straw in cerrado piauiense oxisol

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Sarah Priscilla do Nascimento Amorim ◽  
Cacio Luiz Boechat ◽  
Lizandra de Sousa Luz Duarte ◽  
Daniela Fernandes de Oliveira ◽  
João Carlos Medeiros ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Microbial Population ◽  
Microbial Biomass Carbon ◽  
Basal Respiration ◽  
Microbial Biomass C ◽  
Biomass Carbon ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
Soil Basal Respiration

Carbon and nitrogen from the soil microbial biomass play a significant role in the rotation of C and N, and promote nutrient cycling. Thus, the objective of this study was to evaluate changes in the soil microbial biomass with growing doses of cover plant straw species. The cover plants cultivated in the cerrado biome region were incorporated an Oxisol Ustox. The straw of each cover plant was incorporated at doses of 0; 10; 20 and 30 Mg ha-1. The soil basal respiration was determined by incubating, after 21 days. The microbial biomass carbon and nitrogen were determined by the method the microwave irradiation. The microbial biomass carbon and nitrogen contents in extracts were determined by the wet combustion method and Kjeldahl-N. The metabolic quotient was calculated as the ratio between soil basal respiration rate and microbial biomass C, and the microbial quotient as the ratio between soil microbial biomass C and total carbon of soil. The soil microbial population measured by the attributes of quality responds to the addition of the of grass and legume straws incorporated to the soil; The treatments that cause the greatest stress to the microbial population, at 21 days, mediated by the metabolic quotient, are guandu-anão at a dose of 10 Mg ha-1; Guandu-anão and Guandu fava-larga at 20 Mg ha-1 and Brachiária at a dose of 30 Mg ha-1; The best result regarding microbial attributes of soil quality evaluated was observed with the incorporation of all doses of the straw of Crotalaria-ocroleuca.  

scholarly journals Mapping the Pollution Plume Using the Self-Potential Geophysical Method: Case of Oum Azza Landfill, Rabat, Morocco

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 961
Author(s):  
Meryem Touzani ◽  
Ismail Mohsine ◽  
Jamila Ouardi ◽  
Ilias Kacimi ◽  
Moad Morarech ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Water Table ◽  
Soil Surface ◽  
The Self ◽  
Drainage Network ◽  
Geophysical Method ◽  
Direct Measurements ◽  
Sandy Material ◽  
The City ◽  
Self Potential

The main landfill in the city of Rabat (Morocco) is based on sandy material containing the shallow Mio-Pliocene aquifer. The presence of a pollution plume is likely, but its extent is not known. Measurements of spontaneous potential (SP) from the soil surface were cross-referenced with direct measurements of the water table and leachates (pH, redox potential, electrical conductivity) according to the available accesses, as well as with an analysis of the landscape and the water table flows. With a few precautions during data acquisition on this resistive terrain, the results made it possible to separate the electrokinetic (~30%) and electrochemical (~70%) components responsible for the range of potentials observed (70 mV). The plume is detected in the hydrogeological downstream of the discharge, but is captured by the natural drainage network and does not extend further under the hills.

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