scholarly journals Enzymatic Activity and Enchytraeids Abundance in Agricultural Mountain Soils / Aktywność enzymatyczna i liczebność wazonkowców w glebach górskich użytkowanych rolniczo

2015 ◽  
Vol 66 (3) ◽  
pp. 133-138 ◽  
Author(s):  
Agnieszka Józefowska ◽  
Anna Miechówka
Keyword(s):  
Enzymatic Activity ◽  
Arable Land ◽  
Total Porosity ◽  
Soil Organisms ◽  
Arable Soils ◽  
Grassland Soils ◽  
Soil Mesofauna ◽  
Soil Material ◽  
Edaphic Conditions ◽  
S Poland

AbstractThe number of soil mesofauna and enzymatic activity of soils are good indicators of changes in soil influenced by cultivation. The aim of this study was to compare density of enchytraeids and the activity of dehydrogenases (ADh), urease (AU), and invertase (AI) in the soils of grassland and arable land. Relationships that exist between those biological parameters and the basic soil properties (the content of total organic carbon (TOC) and nitrogen (TN), pH, texture, and total porosity) were defined. In the research, soil material from humus horizon of 12 soils which were located in the Mały Beskid and Silesian Foothills (S Poland) was used. The main density of enchytraeids in grassland soils (12 982 ind⋅m-2) was twice higher than in arable land soils (6099 ind⋅m-2), and the differences were statistically significant. Grassland soils were characterised by higher enzymatic activity than arable land soils. However, only ADh, which were almost three times higher in grassland than in arable soils (2024 and 742 μmol TPFkg-1h-1, respectively), showed significant differences. In grassland soils more favourable edaphic conditions for the development of soil organisms occurred in comparison with arable land.

The effect of rainfall intensity on soil erosion and particulate phosphorus transfer from arable soils

1999 ◽  
Vol 39 (12) ◽  
pp. 41-45 ◽  
Author(s):  
A. I. Fraser ◽  
T. R. Harrod ◽  
P. M. Haygarth
Keyword(s):  
Soil Erosion ◽  
Suspended Sediment ◽  
Rainfall Intensity ◽  
Overland Flow ◽  
Agricultural Soils ◽  
Arable Land ◽  
Significant Proportion ◽  
Particulate Phosphorus ◽  
Arable Soils ◽  
Flow Monitoring

Soil erosion, in the form of transported suspended sediment in overland flow, is often associated with high rates of particulate phosphorus (PP) (total P>0.45 μm) transfer from land to watercourses. Particulate P may provide a long-term source of P for aquatic biota. Twenty-two sites for winter overland flow monitoring were selected in south-west England within fields ranging from 0.2–3.8 ha on conventionally-managed arable land. Fields were situated on highly porous, light textured soils, lacking impermeable horizons and often overlying major aquifers. Long arable use and modern cultivation methods result in these soils capping under rain impact. Overland flow was observed when rainfall intensity approached the modest rate of 0.8 mm hr−1 on land at or near to field capacity. Low intensity rainfall (<2 mm hr−1) produced mean suspended sediment losses of 14 kg ha−1 hr−1, with associated PP transfer rates of 16 g ha−1 hr−1. In high intensity rainfall (>9 mm hr−1) mean PP losses of 319 g ha−1 hr−1 leaving the field were observed. As might be expected, there was a good relationship between PP and suspended sediment transfer in overland flow leaving the sites. The capacity of light soils to cap when in arable use, combined with heavy or prolonged rainfall, resulted in substantial discharges, soil erosion and associated PP transfer. Storms with heavy rain, typically of only a few hours duration, were characterised by considerable losses of PP. Such events, with return periods of once or twice a winter, may account for a significant proportion of total annual P transfer from agricultural soils under arable crops. However, contributions from less intense rain with much longer duration (around 100 hours per winter in many arable districts of the UK) are also demonstrated here.

scholarly journals Microbial soil characteristics of grassland and arable soils linked to thermogravimetry data: correlations, use and limits

2021 ◽  
Author(s):  
Helena Doležalová-Weissmannová ◽  
Stanislav Malý ◽  
Martin Brtnický ◽  
Jiří Holátko ◽  
Michael Scott Demyan ◽  
...  
Keyword(s):  
Soil Properties ◽  
Soil Parameters ◽  
Organic Carbon Content ◽  
Regression Equations ◽  
Arable Soils ◽  
Grassland Soils ◽  
Simple Method ◽  
Organic C ◽  
Mass Losses ◽  
C And N

Abstract. Thermogravimetry (TG) is a simple method that enables rapid analysis of soil properties such as the content of total organic C, nitrogen, clay and C fractions with different stability. However, the possible link between TG data and microbiological soil properties has not been systematically tested yet and limits TG application for soil and soil organic matter assessment. This work aimed to search and to validate relationships of thermal mass losses (TML) to total C and N contents, microbial biomass C and N, basal and substrate-induced respiration, extractable organic carbon content, anaerobic ammonification, urease activity, short-term nitrification activity, specific growth rate, and time to reach the maximum respiration rate for two sample sets of arable and grassland soils. Analyses of the training soil set revealed significant correlations of TML with basic soil properties such as carbon and nitrogen content with distinguishing linear regression parameters and temperatures of correlating mass losses for arable and grassland soils. In a second stage the equations of significant correlations were used for validation with an independent second sample set. This confirmed applicability of developed equations for prediction of microbiological properties mainly for arable soils. For grassland soils was the applicability lower, which was explained as the influence of rhizosphere processes. Nevertheless, the application of TG can facilitate the understanding of changes in soil caused by microorganism’s activity and the different regression equations between TG and soil parameters reflect changes in proportions between soil components caused by land use management.

Soil drugs of the future: The sustainability of BioAg and the repair of arable land

2020 ◽  
pp. 251484862094389
Author(s):  
Peter Oviatt
Keyword(s):  
Mycorrhizal Fungi ◽  
Arable Land ◽  
Biologically Active ◽  
Industrial Agriculture ◽  
Root Tips ◽  
Arable Soils ◽  
Agricultural Commodity ◽  
Scientific Communities ◽  
Three Stages

BioAg, short for biological agriculture, is an umbrella term used by agricultural conglomerates to market biologically active products used for pest control and fertilization. Within this framing, I investigate the commodification of a type of fungus that forms a beneficial relationship with plant roots. Mycorrhizal fungi connect with root tips to exchange photosynthesized sugars for an array of what biologists call “ecosystem services,” which include the translocation of soil minerals, water, and pathogen antagonism. I discuss three conditions that now give rise to the commodification of mycorrhizal fungi in industrial agriculture: the creation of an inoculant form produced under sterile (in vitro) conditions; the declaration of industrial arable soils as lacking functioning communities of mycorrhizal fungi, a deficit most easily remedied through the application of industrially produced inoculants; the build-up of a broader mycorrhizal subjectivity, which has made the loss of mycorrhizal fungi in agricultural lands a concern for those beyond agricultural and scientific communities. To analyze these three stages of the commodification of mycorrhizal fungi, I engage the framework of accumulation by restoration as part of the economy of repair. Following the work of Christopher Henke, I discuss how mycorrhizal inoculants are poised to bring about two forms of repair to soil ecologies and industrial agriculture: maintenance and transformation. I examine the challenges and controversies surrounding the efficacy of mycorrhizal inoculants, testing claims about ecological restoration and how an emergent and heavily promoted agricultural commodity might impact regional agricultural infrastructures, rural ecologies, and agrarian livelihoods. I use the case of mycorrhizal inoculants within BioAg to sort out promissory claims of sustainability, and look at how agricultural conglomerates are now building their envisioned future of industrial agriculture.

scholarly journals Soil acidity and mobile aluminum status in pseudogley soils in Cacak-Kraljevo basin

2012 ◽  
Vol 77 (6) ◽  
pp. 833-843 ◽  
Author(s):  
Ivica Djalovic ◽  
Djordje Jockovic ◽  
Goran Dugalic ◽  
Goran Bekavac ◽  
Bozana Purar ◽  
...  
Keyword(s):  
Forest Soil ◽  
Forest Soils ◽  
Soil Acidity ◽  
Arable Land ◽  
Soil Samples ◽  
Soil Conditions ◽  
Arable Soils ◽  
Mean Values ◽  
Exchangeable Acidity ◽  
The Mean

Soil acidity and aluminum toxicity are considered most damaging soil conditions affecting the growth of most crops. This paper reviews the results of tests of pH, exchangeable acidity and mobile aluminum (Al) concentration in profiles of pseudogley soils from Cacak-Kraljevo basin. For that purpose, 102 soil pits were dug in 2009 in several sites around Cacak- Kraljevo basin. The tests encompassed 54 field, 28 meadow, and 20 forest soil samples. Samples of soil in the disturbed state were taken from the Ah and Eg horizons (102 samples), from the B1tg horizon in 39 field, 24 meadow and 15 forest pits (a total of 78 samples) and from the B2tg horizon in 14 field, 11 meadow, and 4 forest pits (a total of 29 samples). Mean pH values (1M KCl) of the tested soil profiles were 4.28, 3.90 and 3.80 for the Ah, Eg and B1tg horizons, respectively. Soil pH of forest samples was lower than those in meadow and arable land samples (mean values of 4.06, 3.97 and 3.85 for arable land, meadow and forest samples, respectively). Soil acidification was especially intensive in deep horizons, as 27% (Ah), 77% (Eg) and 87% (B1tg) soil samples had the pH value below 4.0. Mean values of total exchangeable acidity (TEA) were 1.55, 2.33 and 3.40 meq 100 g-1 for the Ah, Eg and B1tg horizons, respectively. The TEA values in forest soils were considerably higher (3.39 meq 100 g-1) than those in arable soils and meadow soils (1.96 and 1.93, respectively). Mean mobile Al contents of tested soil samples were 11.02, 19.58 and 28.33 mg Al 100 g-1 for the Ah, Eg and B1tg horizons, respectively. According to the pH and TEA values, mobile Al was considerably higher in the forest soils (the mean value of 26.08 mg Al 100 g-1) than in the arable soils and meadow soils (the mean values of 16.85 and 16.00 mg Al 100 g-1, respectively). The Eg and B1tg horizons of the forest soil had especially high mobile Al contents (the mean values of 28.50 and 32.95 mg Al 100 g-1, respectively). High levels of mobile Al were especially frequent in the forest soils, with 35% (Ah), 85.0% (Eg) and 93.3% (B1tg) of the tested samples ranging above 10 mg Al 100 g-1.

Deep soil accumulation of organic carbon under cultivated Kazakh Steppe soils

2020 ◽  
Author(s):  
Aleksey Prays ◽  
Sonia Banze ◽  
Friedrich Jalowy ◽  
Klaus Kaiser ◽  
Robert Mikutta
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Arable Land ◽  
Soil Tillage ◽  
Arable Soils ◽  
Deep Soil ◽  
Colloidal Transport ◽  
Northern Kazakhstan ◽  
South Siberia ◽  
Soil Accumulation

<p>The decline in organic carbon (OC) stocks after conversion from grassland to cropland under conventional soil tillage practices was 24-32% for American prairie soils. The respective decreases in OC stocks ranged from 27% to more than 40% for steppe soils of the European part of Russia and was about 31% in semi-arid steppe soils of South Siberia. Here, we present results on the soil OC stocks in steppe soils of Northern Kazakhstan, which partly were converted to arable land over the last 60 to 90 years. We sampled soils by genetic horizons along a north-south transect, where precipitation increased towards north but negligible variation in temperature. Soil samples were analyzed for organic and inorganic carbon as well as bulk density.</p><p>Surprisingly, we found along the transect on average only 3.5% smaller OC stocks at 0-10 cm depth in arable than in natural soils. Even more astonishing, all arable soils tested had larger OC stocks in the layers beneath 10 cm depth than the natural steppe soils. On average, the OC stocks in 10-100 cm depth were 34% larger in soils under arable management than in natural steppe soils. We credit the enhanced deep soil accumulation of OC in arable soils of Northern Kazakhstan to colloidal translocation of OC-rich particles along vertical pores. The cause of the increased in colloidal transport under arable management is still under evaluation but appears connected to the clayey soil texture and the large abundance of expandable clay minerals. We conclude that despite of the intense land use and severe climatic conditions accumulation of subsoil carbon is possible even after many decades of cultivation history. Our findings stress the importance of considering whole soil profiles for analyzing the consequences of land use change on the net carbon balance of soils.</p>

scholarly journals Effect of land use change on soil organic carbon

2016 ◽  
Vol 62 (1) ◽  
pp. 10-18 ◽  
Author(s):  
Gabriela Barančíková ◽  
Jarmila Makovníková ◽  
Ján Halas
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Agricultural Soils ◽  
Arable Land ◽  
Statistical Parameter ◽  
Arable Soils ◽  
Permanent Grassland ◽  
Before And After ◽  
Aliphatic Carbon

Abstract The direction of changes and conversion of soil organic carbon (SOC) is in most current ecosystems influenced by human activity. Soil Science and Conservation Research Institute is responsible for monitoring the agricultural soils in a five-year cycle. One part of the soil monitoring involves the determination of the soil organic carbon (SOC) storage. Further, we followed the conversion of arable land on grassland during more than 20 years of monitoring period at some locations where changes in land use occurred. Ten places on basic network and 2 places on key monitoring localities in which arable land have been converted into grassland were identified. About 50 percent of studied soils converted into permanent grassland were Cambisols. The other converted soil types were Luvic Stagnosol, Stagnic Regosol, Mollic Fluvisol, and Stagnic Luvisol. The results showed that after the third monitoring cycle (2002), increase of SOC was observed in all the localities, with the change in land use. Statistical parameter (t-test) confirmed significant differences between the set of average SOC values before and after the land use conversion. The chemical structure of humic acids (HA) isolated from arable soil and permanent grassland indicated increasing of aliphatic carbon content in grassland HA. More aromatic and stabile were HA isolated from arable soils.

scholarly journals Enzymatic Activity and Certain Chemical Properties of Grey-Brown Podzolic Soil (Haplic Luvisol) Amended with Compost of Tobacco Wastes

2014 ◽  
Vol 40 (3) ◽  
pp. 61-73 ◽  
Author(s):  
Alicja Szwed ◽  
Justyna Bohacz
Keyword(s):  
Organic Matter ◽  
Acid Phosphatase ◽  
Enzymatic Activity ◽  
Podzolic Soil ◽  
Chemical Properties ◽  
Biological Properties ◽  
Test Plant ◽  
Chemical Parameters ◽  
Soil Material ◽  
Light Soil

Abstract The paper addresses the effect of a compost prepared from tobacco wastes with an admixture of bark and straw on the enzymatic activity and certain chemical properties of a grey-brown podzolic soil amended with that compost. The study was conducted under the conditions of a pot experiment in which the soil material was collected from the surface horizon of the grey-brown podzolic soil. The effect of the application of the compost was compared with soil without such amendment. The test plant was maize cv. Kosmo 230. Fertilisation of the light soil with the compost studied caused changes in the enzymatic activity of the soil that were related both to the dose of the compost and to the kind of enzyme studied. With increase in the dose of the compost there was an increase in dehydrogenase activity (highest dose) and a significant decrease in the activity of acid phosphatase. Moreover, it was observed that tobacco compost was a significant source that enriched the light soil in organic matter, total nitrogen, and available forms of phosphorus, magnesium and potassium, which was evident in increased yields of maize grown as the test plant. Significant correlations were also demonstrated between a majority of the biochemical and chemical parameters, which indicates that those parameters characterise well the biological properties of a grey-brown podzolic soil amended with tobacco compost.

scholarly journals Impact of land use change on organic carbon sequestration in Arenosol

2019 ◽  
Vol 28 (1) ◽  
Author(s):  
Asta Kazlauskaite-Jadzevice ◽  
Liudmila Tripolskaja ◽  
Jonas Volungevicius ◽  
Eugenija Baksiene
Keyword(s):  
Organic Carbon ◽  
Arable Land ◽  
Land Conversion ◽  
Land Uses ◽  
Arable Soils ◽  
Ap Horizon ◽  
Soc Stock ◽  
Organic Carbon Sequestration ◽  
Pine Forest Soil

Conversion of arable soils into other land uses can stabilize and increase accumulation of soil organic carbon (SOC) and in addition prevent deterioration in its properties. The data has shown changes in SOC sequestration in Ap horizon after arable land conversion (1995–2015) into managed grassland, abandoned and pine afforested. SOC in Arenosol topsoil was positively affected by long term fallow and conversion into grassland. Abandoned land and fertilised managed grassland accumulated significantly more SOC, 48% and 38% respectively compared with arable land. In unfertilised managed grassland SOC stocks decreased 2.3% during 21 years, but losses were lower than in fertilised arable land. Pine afforestation of loamy sand helped to reduce the intensity of SOM mineralization compared to arable land. The Ap horizon thickness in pine forest soil increased from 28 to 31 cm during 21 years period. However, SOC stock decreased by 1% due to reduction in carbon concentration.

scholarly journals Diagnosis of the Content of Selected Heavy Metals in the Soils of the Pałuki Region Against their Enzymatic Activity

2013 ◽  
Vol 39 (3) ◽  
pp. 23-32 ◽  
Author(s):  
Joanna Lemanowicz ◽  
Agata Bartkowiak
Keyword(s):  
Heavy Metals ◽  
Enzymatic Activity ◽  
Plant Species ◽  
Hydrolytic Enzymes ◽  
Soil Samples ◽  
River Valley ◽  
Vegetable Crops ◽  
Soil Material ◽  
The Right ◽  
Very High

Abstract The paper presents the research results for the soils sampled from the area located in the eastern part of the Chodzieskie Lakes, between the Middle Noteć River Valley and the Wełna River Valley, the right tributary of the Warta River. The research involved 7 soil samples from the surface horizons, allocated to the cultivation of various plant species (cereals and vegetable crops). The following were determined in the soil material: the content of phytoavailable forms of selected heavy metals Zn, Cu, Pb, Ni, Fe and Mn, active and available to plants phosphorus against the activity of selected oxydo-reduction and hydrolytic enzymes. The soil under the vegetable crops showed a very high richness in phosphorus available to plants, which must have been related to an intensive fertilisation. There were identified relatively low contents of the available forms of the heavy metals investigated, the fact that points to their natural content in soil, which triggered the inhibition of neither the oxydo-reduction nor hydrolytic enzymes.

scholarly journals THE CONTENT OF TOTAL CADMIUM AND ITS FRACTIONS IN ARABLE LAND OF THE PODLASIE PROVINCE

2016 ◽  
Vol 48 (1) ◽  
pp. 31 ◽  
Author(s):  
Adam Łukowski ◽  
Józefa Wiater
Keyword(s):  
Fractional Composition ◽  
Arable Land ◽  
Total Content ◽  
Magnesium Content ◽  
Residual Fraction ◽  
Cadmium Content ◽  
Arable Soils ◽  
Bcr Method ◽  
Soil Fraction ◽  
Reducible Fraction

<p>The aim of this study was estimation of total cadmium content and its fractional composition in arable soils, depending on their physicochemical properties. The research material consisted of samples taken from arable soil in 81 points within then Podlasie Province. The content of total cadmium in soils and its fractional composition was determined with the BCR method. It was found that the total content of cadmium was typical for uncontaminated soils and ranged from 0.11 to 1.59 mg kg-1. The percentage of acid in the soluble and exchangeable fraction fluctuated at around 10% on average. The reducible fraction comprised about 20% and oxidizable fraction 26%, on average. Most of the cadmium was in the residual fraction. The factors that influenced the fractional composition of cadmium were determined. For the very light and light soils it was mainly the content of magnesium and pH, while for medium soils it was the organic carbon and magnesium content, content of soil fraction &lt;0.02 mm, as well as the percentage of Cd in reducible fraction.</p><p> </p><p>Celem pracy było określenie zawartości ogólnej kadmu i jego składu frakcyjnego w glebach ornych w zależności od ich właściwości fizykochemicznych. Badania wykonano w oparciu o 81 próbek gleb uprawnych pobranych w woj. podlaskim. Określono w nich zawartość ogólną kadmu i jego skład frakcyjny metodą BCR. Zawartość ogólna kadmu była typowa dla gleb niezanieczyszczonych i wahała się w przedziale od 0,11 do 1,59 mg kg-1. Udział kadmu we frakcji rozpuszczalnej w kwasach i wymienialnej wynosił średnio około 10%, we frakcji redukowalnej średnio około 20% i we frakcji utlenialnej średnio 26%. Najwięcej kadmu zgromadziła frakcja rezydualna. Określono czynniki, które wpływały na dystrybucję kadmu pomiędzy frakcjami. W przypadku gleb bardzo lekkich i lekkich największy wpływ miała zawartość magnezu i pH, a w przypadku gleb średnich zawartość magnezu, węgla organicznego, frakcji spławianych i udział procentowy kadmu we frakcji redukowalnej.</p>

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