different soils
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2022 ◽  
Author(s):  
Loren Billet ◽  
Stéphane Pesce ◽  
Fabrice Martin-Laurent ◽  
Marion Devers-Lamrani

Abstract The fertilization of agricultural soil by organic amendment that may contain antibiotics, like manure, can transfer bacterial pathogens and antibiotic-resistant bacteria to soil communities. However, the invasion by manure-borne bacteria in amended soil remains poorly understood, being hardly observed. Here, we assessed the invasions of manure-borne bacteria during a coalescence event between manure and soil, in different soils and in the presence or absence of antibiotics. To this end, microcosms of four different soils were amended or not with manure at an agronomical dose and/or exposed or not to the antibiotic sulfamethazine (SMZ). After one month of incubation, the diversity, structure and composition of bacterial communities of the soils were assessed by 16S rDNA sequencing. The invasion of manure-borne bacteria was still perceptible one month after the soil amendment. The results obtained with the soil already amended in situ with manure six months prior to the experiment suggest that some of the bacterial invaders were established in the community over the long term. Even if differences were observed between soils, the invasion was mainly attributable to some of the most abundant OTUs of manure (mainly Firmicutes). SMZ exposure had a limited influence on soil microorganisms. It was significant in only one soil, where it enhanced the invasion potential of some manure-borne invaders.


2022 ◽  
Author(s):  
Kaixuan Hou ◽  
Yue Yang ◽  
Lei Zhu ◽  
Ruolin Wu ◽  
Zhongkun Du ◽  
...  

Abstract The present study utilized a biomarker response method to evaluate the effect of 3,5,6-trichloro-2-pyridinol (TCP) in artificial and natural soils on Eisenia fetida after 7, 14, 28, 42 and 56 days exposure. Results indicated that TCP induced excessive reactive oxygen species, caused oxidative stress and DNA damage to Eisenia fetida. Biomarker responses were standardized to calculate the Integrated Biomarker Response (IBR) index. The IBR index of three enzymes activities showed that TCP induced the enzymes activities of earthworm in red clay was stronger than the other three soils. Specifically, chlorpyrifos exposure group showed a lower toxicity than TCP exposure group after 28 days exposure but a higher toxicity than TCP exposure group after 56 days exposure. Despite the deficiencies of this study, the above information is of great significance for assessing the risk of chlorpyrifos and its metabolite TCP pollution in soil ecosystems.


CATENA ◽  
2022 ◽  
Vol 208 ◽  
pp. 105759
Author(s):  
N.C. Womack ◽  
I. Piccoli ◽  
C. Camarotto ◽  
A. Squartini ◽  
G. Guerrini ◽  
...  

2022 ◽  
Vol 169 ◽  
pp. 104216
Author(s):  
Martina Mazzon ◽  
Paola Gioacchini ◽  
Daniela Montecchio ◽  
Salvatore Rapisarda ◽  
Claudio Ciavatta ◽  
...  

Agronomy ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 70
Author(s):  
Rafael Antón-Herrero ◽  
Carlos García-Delgado ◽  
Begoña Mayans ◽  
Raquel Camacho-Arévalo ◽  
Laura Delgado-Moreno ◽  
...  

Due to the environmental issues that conventional fertilization is causing, biostimulants are proposed as environmentally friendly alternative for crop nutrition in agriculture. The aim of this study was to determine the effects of new Micro Carbon Technology (MCT®) fertilizers with biostimulant activity based on humic acids biologically digested from leonardite on pepper plant growth in three different soils with different textures. The assays were performed under controlled conditions in a growth chamber and in commercial greenhouses in Spain. The effects on soil were analyzed after the addition of the fertilizers by microbial respiration and enzymatic activities (hydrolase, dehydrogenase and urease). For the plant assays, biometric parameters (fresh weight and fruit hardness) and foliar analysis (chlorophyll indices and nutrients) were evaluated. Under controlled conditions, the use of these biostimulants resulted in a greater soil microbial activity in a 24 h interval with increased soil enzymatic activity. In plants, a positive correlation was found between fertilizers with biostimulant activity and Dualex indices of leaves and content of macronutrients Ca and Mg. In commercial greenhouses, the fertilizers with biostimulant activity strongly depended on the soil texture. In conclusion, these products have real potential to replace conventional fertilizers in commercial production fields.


Agronomy ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 51
Author(s):  
Vladimír Šimanský ◽  
Elena Aydın ◽  
Ján Horák

Understanding nutrient management is essential to ensure healthy and adequate food production, especially in the context of biochar applied to soil with different soil textures. Additionally, farmers are beginning to understand the importance of nutrient management and there are still several knowledge gaps in this area. Several studies on biochar showed its positive effects, especially in sandy and nutrient-poor soils. There is still a lack of information on the impact of biochar on nutrient regimes in texturally different soils with sufficient nutrient supply and favorable soil chemistry. This study investigates the effect of two biochar substrates (a) biochar blended with farmyard manure (BS1), and (b) biochar blended with farmyard manure and digestate (BS2) applied at rates of 10 and 20 t ha−1 alone or in combination with fertilization on the changes in sorption capacity and nutrient regime of two texturally different soils: (a) sandy Arenosol, and (b) loamy Chernozem, (both in western Slovakia) which have a favorable nutrient content. The results showed that in sandy soil, the BS2 at rate of 20 t ha−1 increased the sum of basic cations (by +112%) and CEC (by +93%) compared to the control. In sandy soil, the content of total P increased by +35 and +16% in BS1 20 t ha–1 and BS2 20 t ha−1, respectively, when compared to the unfertilized control. The content of total P increased by +18% in BS1 20 t ha−1 after fertilization compared to the fertilized control. In loamy soil, the content of total P increased significantly by +53 and +14% in unfertilized treatment BS2 20 t ha−1 and fertilized treatment with BS1 at 20 t ha−1 compared to the respective controls. Available Ca increased in sandy soil by +50 and +53% in fertilized treatments with BS2 at 20 t ha−1 and BS1 at 20 t ha−1, respectively, when compared to fertilized control. In loamy soil, available Mg increased by +13% in fertilized treatment with BS1 applied at 20 t ha−1. In conclusion, BS application at a dose of 20 t ha−1 had a stronger positive effect on soil sorption parameters in sandy soil than the application dose of 10 t ha−1. The same BS application rate significantly increased total P in both soils.


Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1526
Author(s):  
Gudla Amulya ◽  
Arif Ali Baig Moghal ◽  
Abdullah Almajed

The increase in infrastructure requirement drives people to use all types of soils, including poor soils. These poor soils, which are weak at construction, must be improved using different techniques. The extinction of natural resources and the increase in cost of available materials require us to think of alternate resources. The usage of industry by-products and related methods for improving the properties of different soils has been studied for several years. Granite dust is an industrial by-product originating from the primary crushing of aggregates. The production of huge quantities of granite dust in the industry causes severe problems from the handling to the disposal stage. Accordingly, in the civil engineering field, the massive utilization of granite dust has been proposed for various applications to resolve these issues. In this context, the present review provides precise and valuable content on granite dust characterization, its effect as a stabilizer on the behavior of different soils, and its interaction mechanisms. The efficacy of the granite dust in replacing sand in concrete is explored followed by its ability to improve the geotechnical characteristics of clays of varying plasticity are explored. The review is even extended to study the effect of binary stabilization on clays with granite dust in the presence of calcium-based binders. The practical limitations encountered and its efficiency over other stabilizers are also assessed. This review is further extended to analyze the effect of the granite dust dosage for various field applications.


2021 ◽  
Vol 11 (4) ◽  
pp. 529-540
Author(s):  
A.A. Prisyazhnaya ◽  
◽  
O.V. Chernova ◽  
G.V. Mitenko ◽  
V.V. Snakin ◽  
...  

The representativeness of the soil diversity in the network of nature protected areas of the Russian Arctic was calculated on the basis of the Soil Map of the Russian Federation, 1:2.5 M scale by using geoinformation analysis. The authors estimated soil cover composition and soil contours areas using the ArcView GIS system. They have identified 90 different soils and soil complexes in the Arctic zone of Russia, 30 of them belong to the Arctic and tundra soils and occupy 47% of total Russian Arctic zone area. In the nature reserves and national parks territory, 48 different soils and soil complexes have been identified, 15 of them belong to the group of arctic and tundra soils, which occupy 60% of the area of protected areas. The investigation shows that currently the existing system of the Arctic protected areas is characterized by high representation of the taxonomic soil diversity (the representativeness indicator is 94%). The only soil type, Arctic Gleezem (Turbic Criosols), is not territorial protected within its typical distribution areas. To optimize the system of Arctic protected areas, the authors propose to adjust the boundaries of the existing nature protected areas in the Anadyr River basin, as well as to consider the possibility of organizing a protected area in the southern part of the Novaya Zemlya Archipelago.


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