Soil organic matter content and composition in different pedoclimatic zones of Bulgaria

Hristov, Biser; Filcheva, Е.

doi:10.18393/ejss.284267

Cited by 7 publications

(8 citation statements)

References 6 publications

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“…The carbon in humic substances (C HA ) of soils under TOG varied between 0.62 and 1.15%, while carbon in fulvic acids (C FA ) was in the narrower range of 0.37-0.59% (Table 3). The C HA /C FA ratio was in the range of 1.25 -2.74 which points to fulvic-humic (C HA /C FA 1.0-1.5) to humic type (C HA /C FA > 1.5) of humus, according to Hristov and Filcheva (2017). Soils under IOG had C HA content in a similar range (0.58 -1.30%).…”

Section: 19) (Table 2) the Distribution Of Ph Kcl In Soils Undermentioning

confidence: 85%

Humus quality in Terrra rossa soils under olive groves with different soil management types

BENSA,

HULJEV,

JURKOVIĆ BALOG

2023

JCEA

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The paper aimed to determine humus quality in Terra rossa soils under olive groves with different soil management types. A total of 10 top-soil samples (0-20 cm) were collected in olive groves of Middle Dalmatia, Croatia, out of which 5 were from the traditional low-input olive groves (TOG) and 5 in the intensive olive groves (IOG). The soil samples were analyzed for basic soil properties, soil organic carbon (SOC), and fractional composition of humic substances. Spectroscopic characterization of humic substances was carried out by measuring absorbance in the VIS spectral range (400-700 nm). Optical index E 4 /E 6 (ratio of optical absorbance at 465 to 665 nm for humic substances in solution) was calculated. The mean value of SOC in soils under TOG (3.06%) was lower than in soils under IOG (3.88%). Higher variations of carbon in humic (C HA ) and fulvic acid (C FA ) were observed in the soils under IOG. The mean C HA /C FA ratio in soils under TOG was higher than in soils of IOG (1.78 and 1.26, respectively). The soils under TOG had fulvic-humic to humic types, while the soils of IOG had humic-fulvic to humic types of humus. A lower mean E 4 /E 6 index of soils under TOG than IOG (3.78 and 4.36, respectively) confirmed the results of the classical analytical method. Our findings reveal higher variation and lower humus quality in soils under intensive olive cultivation.

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Section: 19) (Table 2) the Distribution Of Ph Kcl In Soils Undermentioning

confidence: 85%

Humus quality in Terrra rossa soils under olive groves with different soil management types

BENSA,

HULJEV,

JURKOVIĆ BALOG

2023

JCEA

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“…The flowers of wild-grown T. parthenium L. were collected from two locations in Bulgaria: Tsigov Chark (41 [92]. The plant material was collected in the phase of full flowering and was then dried at room temperature.…”

Section: Plant Materialsmentioning

confidence: 99%

A Comparison between Bulgarian Tanacetum parthenium Essential Oil from Two Different Locations

Lechkova,

Benbassat,

Karcheva-Bahchevanska

et al. 2024

Molecules

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Tanacetum parthenium L. (Asteraceae) is a perennial herbaceous plant with a long-standing historical use in traditional medicine. Recently Tanacetum parthenium L. essential oil has been associated with a promising potential for future applications in the pharmaceutical industry, in the cosmetics industry, and in agriculture. Investigations on the essential oil (EO) have indicated antimicrobial, antioxidant, and repellent activity. The present study aimed to evaluate the chemical composition of Bulgarian T. parthenium essential oil from two different regions, to compare the results to those reported previously in the literature, and to point out some of its future applications. The essential oils of the air-dried flowering aerial parts were obtained by hydrodistillation using a Clevenger-type apparatus. The chemical composition was evaluated using gas chromatography with mass spectrometry (GC-MS). It was established that the oxygenated monoterpenes were the predominant terpene class, followed by the monoterpene hydrocarbons. Significant qualitative and quantitative differences between both samples were revealed. Camphor (50.90%), camphene (16.12%), and bornyl acetate (6.05%) were the major constituents in the feverfew EO from the western Rhodope Mountains, while in the EO from the central Balkan mountains camphor (45.54%), trans-chrysanthenyl acetate (13.87%), and camphene (13.03%) were the most abundant components.

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“…Soil and vegetation diversity is very rich (Soil map of Bulgaria, 1956;Bondev, 1991). Typical soil types in Bulgaria are Umbrisols, Leptosols and Cambisols, according to the soil map of Bulgaria (Hristov and Filcheva, 2017).…”

Section: Case Study Areamentioning

confidence: 99%

How individual scores affect the final expert-based assessments of ecosystem services: Range and mean scores analysis of natural heritage supply maps

Prodanova¹,

Varadzhakova²

2022

EJG

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Ecosystems representing the Natural Heritage (NH) are considered in this study as an important source of ecosystem goods and services for human well-being. On that spatial base, we conducted an expert-based assessment and mapping of their potential to provide ecosystem services (ES) for recreational purposes in Bulgaria. Twelve experts participated in the expert-based assessment by filling individual matrices for the potential of the NH to provide ES. We analysed the results i.e. individual scores by comparing them, and calculating the minimum, the maximum and the range scores between them. We calculated the mean individual experts’ scores by ecosystem types and subtypes for nine prioritized ecosystem services for recreation – 2 provisioning, 2 regulating and 5 cultural. The results show that individual experts have different perceptions for some ecosystems and their services due to their different scientific expertise. This follows from the quite high ranges i.e., 4 or 5 units between maximum and minimum score per spatial unit. There are: (i) significant variations in scoring of Grasslands, Wetlands, Croplands, Rivers and lakes, and Urban ecosystems; and (ii) considerable similarities about Woodland and forest, Sparsely vegetated lands and Marine ecosystems. To compare the spatial discrepancies between the experts’ scores, we map them individually. A final integrated map represents the potential of the NH in Bulgaria to provide ecosystem services for recreation with an average score above 3.00. The main outcomes of our study are the analyses we made on the individual and the group experts’ scores.

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Soil organic matter content and composition in different pedoclimatic zones of Bulgaria

Cited by 7 publications

References 6 publications

Humus quality in Terrra rossa soils under olive groves with different soil management types

Humus quality in Terrra rossa soils under olive groves with different soil management types

A Comparison between Bulgarian Tanacetum parthenium Essential Oil from Two Different Locations

How individual scores affect the final expert-based assessments of ecosystem services: Range and mean scores analysis of natural heritage supply maps

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