scholarly journals Fertility Impact of Separate and Combined Treatments with Biochar, Sewage Sludge Compost and Bacterial Inocula on Acidic Sandy Soil

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1612 ◽  
Author(s):  
Nikolett Uzinger ◽  
Tünde Takács ◽  
Tibor Szili-Kovács ◽  
László Radimszky ◽  
Anna Füzy ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Microbial Activity ◽  
Sandy Soil ◽  
Combined Treatments ◽  
Short Term ◽  
Root Colonisation ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Combined Application

The short-term effects of processed waste materials: sewage sludge compost (up to 0.5%), biochar made of paper sludge and grain husk (BC) (up to 2%) combined with plant growth-promoting rhizobacterial (PGPR) inoculum, on the fertility of acidic sandy soil at 65% of field capacity were tested in a pot experiment in separate and combined treatments. The soil pH, organic matter content, total and plant-available nutrients, substrate-induced respiration, arbuscular mycorrhizal fungal (AMF) root colonisation parameters and maize (Zea mays L.) biomass were investigated in experiments lasting two months. The positive priming (21% organic matter loss) induced by BC alone was not observed after combined application. The combination of compost and PGPR with 1.5% BC resulted in 35% higher P and K availability due to greater microbial activity compared to BC alone. Only compost applied alone at 0.5% gave a 2.7 times increase in maize biomass. The highest microbial activity and lowest AMF colonisation were found in combined treatments. In the short term the combined application of BC, compost and PGPR did not result in higher fertility on the investigated soil. Further research is needed with a wider range of combined treatments on acidic sandy soil for better understanding of the process.

Short-term Effects of Sewage-Sludge Compost on a Degraded Mediterranean Soil

2006 ◽  
Vol 70 (4) ◽  
pp. 1178-1188 ◽  
Author(s):  
Marie Larchevêque ◽  
Virginie Baldy ◽  
Nicolas Montès ◽  
Catherine Fernandez ◽  
Gilles Bonin ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Short Term ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Mediterranean Soil ◽  
Short Term Effects

Changes in soil nutrient content, biological activity and CO2 emission rate as a result of low-dose municipal sewage sludge compost application

2020 ◽  
Author(s):  
Andrea Prof. Dr. Farsang ◽  
Katalin Dr. Perei ◽  
Attila Bodor ◽  
Zsuzsanna Dr. Ladányi ◽  
Katalin Csányi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Enzyme Activity ◽  
Biological Activity ◽  
Sewage Sludge ◽  
Low Dose ◽  
Nutrient Content ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Sludge Compost ◽  
Sewage Sludge Compost

<p>Land application of sewage sludge is an increasingly popular means of the reuse of sewage sludge as it allows for recycling of valuable components, such as organic matter, N, P and other nutrients. Indeed, sewage sludge amendment to the soil modifies the soil’s physico-chemical properties, such as plant-available macro/micro nutrient contents, organic matter content. Additionally, sewage sludge applications can significantly increase the amount of microbial biomass in the soil and can also increase the soil enzyme activities. The aim of the present study is to investigate the impact of low-dose municipal sewage sludge compost amendment on the nutrient status and the biological activity in Chernozem soils. </p><p>The study area, located near Újkígyós (SE Hungary), is a 5.6 ha arable land, where 2.5 m<sup>3</sup>/ha/year municipal sewage compost has been regularly disposed since 2013. The pH (in H<sub>2</sub>O) and humus content of soils were measured according to standard procedures. The macronutrients P<sub>2</sub>O<sub>5</sub> and K<sub>2</sub>O were extracted using ammonium-lactate, while the nitrogen forms (NO<sub>2</sub><sup>-</sup> + NO<sub>3</sub><sup>-</sup> -N) were extracted with KCl-solution. The nutrient content was then determined by a flow injection analysis photometer. In order to determine the bacterial composition and enzyme activity of the soil samples, the number of living cells (CFUs), the catalase enzyme activity (CAT) and the dehydrogenase activity (DHA) were determined. The CO<sub>2</sub> emission was measured by an EGM-5 Portable High Precision CO<sub>2</sub> Meter in the field.  </p><p>The sewage sludge compost applied to Chernozem soils improved soil properties by adding slowly decomposing organic matter, abundant in plant macronutrients (N, K, P). The anaerobic microorganisms and the DHA enzyme activity in the anaerobic soil layers did not increase in the compost-amended soils. The aerobic microorganisms (CFUs) and CAT activity tended to be higher in treated soils compared to the non-amended (control) site, however not significantly. These results suggest that the soil biological activity is only moderately affected by the low-dose municipal sewage sludge compost applications. According to our field CO<sub>2</sub> emission measurements, the yearly application of the sewage sludge compost in a low-dose seemingly did not affect the soil respiration rates, compared to a local control site.</p><p>The research was funded by the ‘Thematic Network for the Sustainable Use of Re-sources – RING2017’ project (program code: EFOP-3.6.2-16-201700010).</p>

Effects of Sewage Sludge Compost on the Physicochemical Properties of the Aeolian Sandy Soil

2014 ◽  
Vol 955-959 ◽  
pp. 2764-2767
Author(s):  
Jie Wang ◽  
Feng De Tang ◽  
Yan Li Yi
Keyword(s):  
Sewage Sludge ◽  
Bulk Density ◽  
Sandy Soil ◽  
Ph Value ◽  
Organic Fertilizer ◽  
Field Capacity ◽  
Total N ◽  
Available N ◽  
Sludge Compost ◽  
Sewage Sludge Compost

The aim of this study was to assess the effects of the addition of sewage sludge compost (SSC) on the properties of aeolian sandy soil by measuring electric conductivity (EC),pH value,bulk density,field capacity,total N(TN),total P(TP),organic matter (OM),available N,available P and available K.Seven treatments were included in this experiment,the SSC was applied at rates of 0,2,5,10,15,20,25 kg·m-1.The results showed that the physichemical properties changed greatly with the addition of SSC to the soil. As for physical properties of the soil, bulk density decreased gradually, the field capacity increased significantly compared with CK,As for chemical properties, pH changed inapparently, the concentration of OM and other nutrients were positive correlated with SSC dosages. It was concluded that the addition of SSC could enhance the soil’s fertility and improve the soil’s physical structure,it was an effective disposition way for sewage sludge to be used as the organic fertilizer in soil.

scholarly journals Short-Term Effects of Sewage Sludge Compost Amendment on Semiarid Soil

Soil Systems ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 48 ◽  
Author(s):  
Maddalena Curci ◽  
Anna Lavecchia ◽  
Giovanna Cucci ◽  
Giovanni Lacolla ◽  
Ugo De Corato ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Properties ◽  
Mineral Fertilizer ◽  
Short Term ◽  
Total N ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Dose Rates ◽  
Compost Amendment ◽  
Short Period

The adoption of sewage sludge as an agricultural management strategy to improve soil properties and crop production is attracting great interest. Despite many positive effects on soil inorganic and organic components reported for different soil types, little information is available on sewage sludge application on Mediterranean soils, as well as on its use at different dose rates. The objectives of the present research was to evaluate, through an integrated approach, the effects of sewage sludge compost from urban wastewater on physicochemical, hydrological, biochemical parameters, and microbiota composition in soil pots under a three-year crop rotation system. Four different doses of sewage sludge compost (C3, C6, C9, C12) from municipal wastewater and a dose of them in combination with mineral fertilizer (C6N) were used. We have used 3-6-9-12 Mg/ha of sewage sludge compost for the treatments C3, C6, C9 and C12, respectively, and 6 Mg/ha of sewage sludge compost in combination with 60 kg/ha of ammonium nitrate for the treatment C6N.The effects were compared to non-fertilized (C0) and mineral fertilized (Min) sets of controls. The electrical conductivity, soil pH, stability of soil aggregates, percent of moisture of the dry soil both at the field capacity and at the wilting point, available P, and exchangeable K were all positively affected by increasing the amounts of composted sludge. The organic carbon and total N increased up to 66% and 39%, respectively. Increased enzymatic activities and microbial biomass were also observed in soil after the application of sewage sludge compost when compared to un-amended control. A higher richness and evenness among the soil plots amended with sewage sludge compost was observed, with no significant differences among the application dose rates, when compared to the un-amended soil control and soil treated with a mineral fertilizer. A three-year amendment was able to separate soil plots amended with high doses of sewage sludge compost from the low dose amended and control samples. Among the microbial groups responsible for such marked separation, bacteria belonging to Actinobacteria, Acidobacteria, Cyanobacteria and Bacteroidetes contribute the most, with a shift from oligotrophic to copiotrophic taxa. Significant changes in bacterial composition and taxonomic structure should be considered in order to properly balance agronomic and economic advantages with environmental concerns. After all, our results have evidenced the effects of sewage sludge amendment on different soil properties, microbial activity, and composition already after a short period of application. The findings are particularly relevant in semiarid soils, where an immediate restoration of soil fertility by short-term compost application is needed.

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