The iodine content in areas with enhanced landscape management in the Czech Republic

The objective of this study was to examine iodine and selenium contents in skeletal muscles of selected species of game animals living in regions with low iodine and selenium contents in the soil and water. Iodine content was determined in 66 samples of skeletal muscles of red deer cut out of the musculus gracilis, 32 samples and 27 samples from the same muscle of roe deer and wild boar, respectively. The shot game animals came from hunting grounds in western and southern regions of the Czech Republic and in Protected Landscape Area Šumava. In red deer muscles the average iodine content was 44.9 ± 15.2 μg I·kg-1 wet weight with the range of 6.9 to 82.0 μg I·kg-1. The lower concentration in roe deer meat with the average 39.3 ± 14.1 μg I·kg-1 and the range from 18.3 to 84.4 μg I·kg-1 may be due to differences between biotopes and food. The average iodine concentration in the musculus gracilis of wild boars was 55.9± 27.0 μg·kg-1 wet weight. Selenium content was determined in 22 samples of red deer, 51 samples of roe deer and 27 samples of wild boar skeletal muscles. The average values of selenium content in the meat of red deer, roe deer and wild boars were 16.2 ± 8.4, 36.9 ± 16.6 and 27.6 ± 19.8 μg Se·kg-1 wet weight, respectively. All three species of game animals are characterised by low content and high variability of selenium concentration in meat with the minimum value 3.9 µg and maximum value 83.3 μg·kg-1 wet weight. The study brings new data on iodine and selenium content in the muscle of game animals in the Czech Republic.

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Iodine content development in raw cow’s milk in three regions of the Czech Republic between the years 2008 and 2018

Acta Veterinaria Brno ◽

10.2754/avb201988030265 ◽

2019 ◽

Vol 88 (3) ◽

pp. 265-270

Author(s):

Roman Konečný ◽

Zuzana Křížová ◽

Jan Hladký ◽

Jitka Kautská ◽

Lucie Hasoňová ◽

...

Keyword(s):

Czech Republic ◽

Iodine Content ◽

Iodine Concentration ◽

Cow’S Milk ◽

Human Consumption ◽

The Czech Republic ◽

Cow's Milk ◽

Current State ◽

Content Development ◽

Raw Cow’S Milk

The study examines an analysis and evaluation of iodine content in raw cow’s milk in three regions of the Czech Republic between the years 2008 and 2018. Bulk milk samples were collected at dairy farms situated in South Bohemia, Central Bohemia, and the Vysočina Region. Iodine in milk was determined on the basis of alkaline ashing, using the spectrophotometric method according to Sandell-Kolthoff. The highest mean iodine content was measured in 2009 (485.5 ± 408.2 μg/l) and the lowest in 2016 (169.2 ± 71.7 μg/l). Since 2010 there has been a gradual decline of iodine concentration, from 479.5 ± 304.9 μg/l in 2010 to 231.2 ± 63.5 μg/l in 2018. A similar decreasing tendency was recorded in all the monitored regions. The percentage of samples containing iodine above 500 μg/l was on the decrease (37% in 2009; 0% in 2016–2018) and less than 80 μg/l (8% in 2009; 0% in 2017–2018). The current state corresponds to the requirements for iodine content in milk for human consumption. The study emphasizes the importance of continuous iodine content checks in milk and the related adjustments of iodine supplementation to the feeding rations of dairy cows.

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Iodine content in consumer hen eggs

Veterinární Medicína ◽

10.17221/5526-vetmed ◽

2012 ◽

Vol 51 (No. 3) ◽

pp. 93-100 ◽

Cited By ~ 17

Author(s):

J. Travnicek ◽

V. Kroupova ◽

I. Herzig ◽

J. Kursa

Keyword(s):

Czech Republic ◽

Correlation Coefficient ◽

Daily Intake ◽

Iodine Content ◽

Egg Yolk ◽

Human Nutrition ◽

Total Iodine ◽

Fresh Matter ◽

The Czech Republic

This paper presents the latest information about the supply of iodine to meet its requirements in hens of laying type, on the basis of iodine content in egg yolk and about the importance of eggs as an iodine source in human nutrition. The Sandell-Kolthoff method was applied to determine iodine content in the yolk of eggs from 9 large flocks (54 eggs) and 16 small flocks (96 eggs) in 2004, and from 10 large flocks (135 eggs) and 15 small flocks (114 eggs) in 2005. Iodine content was also determined in the albumen of 70 eggs. In 2004, the iodine content in the yolk of eggs from large flocks was 1 014.1 ± 356.6 while in 2005 it amounted to 1 663.8 ± 1 179.7 µg/kg fresh matter (P < 0.01); the respective values for the yolk of eggs from small flocks in 2004 and 2005 were 307.1 ± 255.7 and 519.5 ± 508.2 µg/kg fresh matter (P < 0.01). Compared to 1996, in 2005, the iodine content in yolk increased by 123.7% in large flocks, and by 19.2% in small flocks. The iodine content in albumen was 16.2 ± 9.7 µg/kg fresh matter, and it accounted for 2.6–5.0% of the total iodine content in 1 egg. The correlation coefficient between iodine contents in yolk and albumen was r = 0.67. In the Czech Republic, 1 egg from large flocks contains on average 31.2 µg iodine while 1 egg from small flocks contains 10.0 µg. Eggs from large flocks cover 7–14% and from small flocks 2.2–4.4% of the daily iodine requirement in adults. Iodine concentrations exceeding 2 500 µg/kg yolk fresh matter in large flocks were measured between week 32 and 60 of the laying cycle and with daily intake of 0.116–0.132 mg iodine per hen.

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Present Approaches to Landscape Typology in the Czech Republic

Journal of Landscape Ecology ◽

10.2478/v10285-012-0057-5 ◽

2012 ◽

Vol 5 (3) ◽

pp. 24-35 ◽

Cited By ~ 4

Author(s):

Dušan Romportl ◽

Tomáš Chuman

Keyword(s):

Czech Republic ◽

Landscape Planning ◽

Landscape Management ◽

Sustainable Land Use ◽

Optimal Method ◽

Natural Landscape ◽

Policy Makers ◽

The Czech Republic ◽

Wide Range ◽

Methodological Approaches

ABSTRACT Landscape typologies are widely recognised as useful tools for landscape management and planning. However, there is wide range of different approaches producing diverse outputs, which makes the usage of landscape typologies sometimes difficult or confusing in general practice (Wascher ed., 2005). The same situation is found in the Czech Republic, where a number of holistic, expert-based and quantitative approaches were developed. These differences could be explained by different objectives of landscape classification, different input data and methods used, and by the particular author’s experience and erudition. Nevertheless, landscape typology should be clear both for scientists, landscapeplanners and policy makers. It is necessary to create valid landscape-planning documents which have to reflect regional, cultural and natural landscape specifics, for as effective and sustainable land use as possible. For such a strategic planning, clearly defined and characterised spatial units seem to be an essential base. This paper aims to introduce the fundamental methodological approaches, provides basic comparison of different Czech typologies, and discusses an optimal method for landscape planning.

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Modeling of soil erosion hazards as a response of land use changes

Geografie ◽

10.37040/geografie2000105020166 ◽

2000 ◽

Vol 105 (2) ◽

pp. 166-176

Author(s):

Vít Voženílek ◽

Jaromír Demek

Keyword(s):

Land Use ◽

Czech Republic ◽

Soil Erosion ◽

Cultural Landscapes ◽

Water Discharge ◽

Land Use Changes ◽

Landscape Management ◽

Runoff Water ◽

Fluvial Systems ◽

The Czech Republic

It is generally accepted that land use changes influence fluvial regime, especially generation of surface runoff, water discharge in water courses, and soil erosion. The disturbances in fluvial systems of old cultural landscapes caused by land use changes bring many difficulties in landscape management (floods, accelerated soil erosion, silting of river beds, etc.). The land use structure in the Trkmanka River catchment in the Czech Republic consisted until 1953 of fragmented plots (small patches of land, ribbons) and later has been changed into large fields with agricultural monocultures. The catchment is known for the highest values of soil erosion in the Czech Republic. Testing of common soil erosion models showed that they are not fitted for the catchment. A new model of soil erodibility is proposed in this paper.

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It is time to change land use and landscape management in the czech republic

Ecosystem Health and Sustainability ◽

10.1890/15-0016.1 ◽

2015 ◽

Vol 1 (9) ◽

pp. 1-6 ◽

Cited By ~ 4

Author(s):

Petr Petřík ◽

Josef Fanta ◽

Martin Petrtýl

Keyword(s):

Land Use ◽

Czech Republic ◽

Landscape Management ◽

The Czech Republic

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Iodine content in goat and sheep milk related to herd size, seasonality, farming practice and breed effect

Acta Veterinaria Brno ◽

10.2754/avb202190040431 ◽

2021 ◽

Vol 90 (4) ◽

pp. 431-438

Author(s):

Marcela Klimešová ◽

Lenka Vorlová ◽

Hana Zachovalová ◽

Aleš Dufek ◽

Ludmila Křížová ◽

...

Keyword(s):

Czech Republic ◽

Statistical Significance ◽

Iodine Content ◽

Iodine Concentration ◽

Herd Size ◽

Farming Practices ◽

The Czech Republic ◽

Sheep Milk ◽

The Mean ◽

Species Variability

Iodine is a milk micronutrient whose concentration is highly variable and depends on several factors. The aim of this work was to monitor the prevailing concentration of iodine in raw goat (n = 71) and sheep (n = 68) milk from farms in the Czech Republic, to assess the variation in iodine levels and evaluate them with farming practices, herd size, breed and season. Iodine was determined by a spectrophotometric method according to Sandell-Kolthoff. The mean prevailing iodine concentration in goat and sheep milk was 249.73 and 264.21 μg/L, respectively. In addition to inter-species variability, we found statistically significant differences depending on the both sheep and goat herd size. The differences between conventional and organic farming were relatively minor and without statistical significance.

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