scholarly journals Organic amendment effects on nematode distribution within aggregate fractions in agricultural soils

2019 ◽  
Vol 1 (3-4) ◽  
pp. 147-156 ◽  
Author(s):  
Xiaoke Zhang ◽  
Xia Wu ◽  
Shixiu Zhang ◽  
Yuehua Xing ◽  
Wenju Liang
Keyword(s):  
Organic Amendment ◽  
Agricultural Soils ◽  
Aggregate Fractions

scholarly journals Evaluation of Non-Conventional Biological and Molecular Parameters as Potential Indicators of Quality and Functionality of Urban Biosolids Used as Organic Amendments of Agricultural Soils

2020 ◽  
Vol 10 (2) ◽  
pp. 517 ◽  
Author(s):  
Miriam del Rocío Medina-Herrera ◽  
María de la Luz Xochilt Negrete-Rodríguez ◽  
José Luis Álvarez-Trejo ◽  
Midory Samaniego-Hernández ◽  
Leopoldo González-Cruz ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Microorganisms ◽  
Organic Amendment ◽  
Agricultural Soils ◽  
Organic Amendments ◽  
Biological Properties ◽  
Different Seasons ◽  
C And N ◽  
Two Indices ◽  
Enzymatic Machinery

Biosolids are waste from wastewater treatment and have a high content of organic matter and nutrients. In this study, not conventional physicochemical and biological properties of biosolids produced during different seasons of the year were evaluated. These properties are not considered in environmental regulations; however, they are of agronomic interest as indicators of quality and functionality in soils. Also, molecular analysis by Fourier-transform infrared (FTIR) was conducted, enzymatic analysis using the APIZYM® system was performed and two indices of functional and microbial diversity were established. The results showed that the biosolids had a high content of total organic carbon, total nitrogen, P, and K. FTIR analyses showed that chemical composition of biosolids was similar during all year. The C and N of microbial biomass demonstrated presence of active microorganisms, as well as a uniformity in its richness and abundance of species that could present a positive synergy with soil microorganisms. The enzymatic activities showed that the biosolids contained an enzymatic machinery available to promote the mineralisation of the organic matter of biosolids and could even transcend into the soil. Finally, biological properties can be used as indicators of quality and functionality of biosolids before being used as an organic amendment, especially in agricultural soils.

scholarly journals Soil Aggregate Stability of Forest Islands and Adjacent Ecosystems in West Africa

2020 ◽  
Author(s):  
Amelie Baomalgré Bougma ◽  
Korodjouma Ouattara ◽  
Halidou Compaore ◽  
Hassan Bismarck Nacro ◽  
Caleb Melenya ◽  
...  
Keyword(s):  
West Africa ◽  
Agricultural Soils ◽  
Direct Action ◽  
Soil Aggregates ◽  
Aggregate Stability ◽  
Mean Annual Precipitation ◽  
Savanna Vegetation ◽  
Aggregate Fractions ◽  
Study Sites ◽  
Forest Islands

Abstract. In the more mesic savanna areas of West Africa, significant areas of relatively tall and dense vegetation with a species composition more characteristic of forest than savanna are often found around villages areas. These forest islands may be the direct action of human activity. To better understand the processes leading to the development of these patches with relatively luxuriant vegetation, our study focused on the stability of the soil aggregates of forest islands, nearby areas of natural savanna vegetation across a precipitation transect in West Africa for which mean annual precipitation at the study sites ranges from 0.80 to 1.27 m a−1. Soil samples were taken from 0 to 5 cm and 5 to 10 cm depths and aggregate fractions with diameters: > 500 μm, 500–250 μm and 250–53 μm (viz. macro aggregates, mesoaggregates and microaggregates) determined using the water sieving method. The results showed significant higher proportion of stable meso and macro- aggregates in forest islands and natural savanna compared to agricultural soils (p 

Impact of spent coffee grounds as organic amendment on soil fertility and lettuce growth in two Mediterranean agricultural soils

2017 ◽  
Vol 64 (6) ◽  
pp. 790-804 ◽  
Author(s):  
Ana Cervera-Mata ◽  
Silvia Pastoriza ◽  
José Ángel Rufián-Henares ◽  
Jesús Párraga ◽  
Juan Manuel Martín-García ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Organic Amendment ◽  
Agricultural Soils ◽  
Spent Coffee Grounds ◽  
Coffee Grounds ◽  
Lettuce Growth

scholarly journals Effect of the Long-Term Application of Sewage Sludge to A Calcareous Soil on Its Total and Bioavailable Content in Trace Elements, and Their Transfer to the Crop

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 356
Author(s):  
Armelle Zaragüeta ◽  
Alberto Enrique ◽  
Iñigo Virto ◽  
Rodrigo Antón ◽  
Henar Urmeneta ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Organic Amendment ◽  
Agricultural Soils ◽  
Total Concentration ◽  
Organic Fertilizer ◽  
Barley Straw ◽  
Soil Protection ◽  
Diethylene Triamine Pentaacetic Acid ◽  
Mn Concentrations

Sewage sludge (SS) can be used as an organic amendment in agricultural soils, provided they comply with the relevant legislation. This use can incorporate traces of metals into the soil, which can cause environmental or human health problems. In the study period between 1992 and 2018 (26 years), it was observed that the use of SS as an organic fertilizer significantly increased the total concentration of Zn, Cu, Cr, Ni and Hg of this study between 55.6% (Hg) and 7.0% (Ni). The concentration of Zn, Cu, Pb, Ni and Cd extracted with DTPA, also increased between 122.2% (Zn) and 11.3% (Cd). In contrast, the Mn concentrations extracted with Diethylene Triamine Pentaacetic Acid (DTPA)were 6.5% higher in the treatments without SS. These changes in the soil had an impact on the crop, which showed a significant increase in the concentration of Zn, Cu and Cr in the grain, between 15.0% (Cr) and 4.4% (Cu), and a decrease in the concentration of Mn, Cr and Ni in the barley straw when SS was added to the soil between 32.2% (Mn) and 29.6% (Ni). However, the limits established by current legislation on soil protection and food were not exceeded. This limited transfer to the crop, is likely due to the high content of carbonates and organic matter in the soil, which limit the bioavailability of most of the trace metals (TM) in the soil. As a conclusion, we observe that the use of SS as an organic amendment increased the concentration of some TM in the soil, in its bioavailable forms, and in the crop.

scholarly journals Low occurrence of Pseudomonas aeruginosa in agricultural soils with and without organic amendment

2014 ◽  
Vol 4 ◽  
Author(s):  
Amélie Deredjian ◽  
Céline Colinon ◽  
Edmond Hien ◽  
Elisabeth Brothier ◽  
Benjamin Youenou ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Organic Amendment ◽  
Agricultural Soils

Organic amendment effects on aggregate-associated organic C, microbial biomass C and glomalin in agricultural soils

CATENA ◽  
2014 ◽  
Vol 123 ◽  
pp. 188-194 ◽  
Author(s):  
Xiaoke Zhang ◽  
Xia Wu ◽  
Shixiu Zhang ◽  
Yuehua Xing ◽  
Ren Wang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Amendment ◽  
Agricultural Soils ◽  
Microbial Biomass C ◽  
Organic C

The effect of organic amendment, water content, and oxygen on the incorporation of 15N2 by some agricultural and forest soils

1969 ◽  
Vol 15 (8) ◽  
pp. 899-905 ◽  
Author(s):  
R. Brouzes ◽  
J. Lasik ◽  
R. Knowles
Keyword(s):  
Forest Soils ◽  
Organic Amendment ◽  
Agricultural Soils ◽  
Dry Weight ◽  
Anaerobic Conditions ◽  
Litter Addition ◽  
Consistent Effect ◽  
Ph Values ◽  
Area Basis ◽  
Profile Depth

Thirty samples of nine soil profiles were variously treated and incubated in aerobic and in anaerobic 15N-labelled atmospheres in the laboratory. The addition of glucose to agricultural soils stimulated nitrogen fixation, especially under anaerobic conditions, but glucose had little or no consistent effect in most forest soils. The addition of straw litter to aerobically incubated waterlogged agricultural soils caused increased fixation. In general, however, and especially in forest soils, there was no consistent effect of either litter addition or waterlogging. It may be noted that in many cases greater fixation occurred in waterlogged soil–litter mixtures when incubated anaerobically than when incubated aerobically. About 80% of all treatments showed greater fixation under anaerobic than under aerobic conditions. Nitrogen incorporation during 28 days at 25 °C ranged from 0 to 70 μg N/g dry weight. Estimates on an area basis for a 17-cm profile depth ranged from 2 to 200 kg N fixed/ha per year.Azotobacter was confined to agricultural soils above about pH 6.5. Clostridium was widely distributed and usually abundant even in soils with pH values as low as 3.3. "Oligonitrophiles" were abundant but their significance remains uncertain.

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