scholarly journals SEASONAL AND LONG-TERM CHANGES OF VEGETATION INDEX OF ARABLE LANDS OF BRYANSK REGION (CENTRAL RUSSIA): REGULARITIES AND DYNAMICS FACTORS

2020 ◽  
Vol 17 (34) ◽  
pp. 745-755
Author(s):  
Grigory V LOBANOV ◽  
Marina V AVRAMENKO ◽  
Alina P PROTASOVA ◽  
Nikolai N DROZDOV
Keyword(s):  
Vegetation Index ◽  
Humus Content ◽  
Arable Land ◽  
Vegetation Indices ◽  
Climatic Fluctuations ◽  
The Sustainable Development ◽  
Central Russia ◽  
Long Term Changes ◽  
Agricultural Use

There are a number of different factors that affect the sustainable development of agriculture. Efficient use of land and water resources, taking into account the threats that may arise due to climate change, as well as the dynamics of plant growth and development. Vegetation indices play an important role in monitoring vegetation variations. This article provides information on seasonal and long-term changes in the EVI (Enhanced Vegetation Index) of arable land in the Bryansk region. The purpose of the article is to discern the course of the seasonal dynamics of the index, the ranges of its variability, probable causes of differences between 2000-2018. In this article, physicochemical research methods were used to calculate the humus content, surface topography characteristics, and agricultural use features based on cartographic and stock materials, and the soil composition and density were determined through fieldwork. Summarized material on changes in EVI values for a snowless period as a whole and for individual filming intervals (18 per year) in 2000-2018 is presented. The mechanism of the influence of a variety of edaphic vegetation conditions on smoothing the differences in EVI over a series of years with different meteorological conditions has been described. The results of the analysis of the factors of the long-term dynamics are presented, the role of short-term climatic fluctuations, a progressive decrease in the amount of precipitation, and changes in the species composition of grain crops in the long-term dynamics of EVI are demonstrated.

Seasonal and Long-Term Features of the Distribution of the Vegetation Index NDVI on Arable Lands in Bryansk Region

2018 ◽  
Vol 9 (1) ◽  
pp. 34
Author(s):  
Gregory V. LOBANOV ◽  
Boris V. TRISHKIN ◽  
Marina V. AVRAMENKO ◽  
Anna Yu. CHAROCHKINA ◽  
Alina P. PROTASOVA
Keyword(s):  
Seasonal Dynamics ◽  
Vegetation Index ◽  
Humus Content ◽  
Arable Land ◽  
Vegetation Indices ◽  
Vegetation Period ◽  
Surface Slope ◽  
Mean Values ◽  
Complex Ratio

The features of the multi-year distribution of vegetation indices are considered as an indicator of the favorable conditions for farming, the correspondence of the set of crops with the soil, geomorphological, microclimatic characteristics of the agrolandscape. The authors presented methodical problems of using information about NDVI for remote determination and monitoring of soil properties through bioproductivity. Methods of collecting and systematizing information on the seasonal and long-term dynamics of NDVI (according to MODIS data) and some factors of the spatial distribution of its mean values were used for a detailed study of the issue. The possible mechanisms of influence of the surface slope (the values are determined by SRTM), the average humus content, the mechanical strength of soils on the NDVI distribution were shown. Information on NDVI arable land changes in the Bryansk region in the years with different meteorological conditions (2010-2015) was given. The general features of NDVI seasonal dynamics within the vegetation period were described – from late March to early November. The influence of meteorological factors on the distribution of NDVI was determined. Synchronous differences in the dynamics of NDVI for groups of arable land plots homogeneous in the state of the surface slope and agrotechnical characteristics of soils were justified from the position of seasonal dynamics of landscapes. A complex ratio of the significance of groups of factors was shown, possible models for explaining their differences in space and time were proposed.

Effects of Seasonal and Perennial Climatic Fluctuations on Geographical Distribution of the Enhanced Vegetation Index EVI of Arable Land in the Bryansk Region

2019 ◽  
Vol 10 (3) ◽  
pp. 669
Author(s):  
Grigory V. LOBANOV ◽  
Marina V. AVRAMENKO ◽  
Anna Yu. CHAROCHKINA ◽  
Nikolay N. DROZDOV
Keyword(s):  
Geographical Distribution ◽  
Vegetation Index ◽  
Agricultural Land ◽  
Humus Content ◽  
Arable Land ◽  
Distribution Patterns ◽  
Climatic Conditions ◽  
Climatic Fluctuations ◽  
Enhanced Vegetation Index ◽  
Lithological Composition

This article discusses the patterns of geographical distribution of the enhanced vegetation index EVI within the Bryansk region (upper Dnieper basin, south-western Russia) in the spring months of 2010-2015. The factors of index distribution, based on agricultural land monitoring data in other regions, are described. The crucial role of abiotic (topography, soil) and biotic factors in the distribution of the EVI is shown. The generalized data of meteorological observations of 2010-2015 are presented; the effects of their high variability on the range of the EVI values and its geographical distribution are shown. Data on the differences in the EVI distribution in the spring months of 2010-2015 is presented, which are explained by the differing periods of phenological seasons, surface relief characteristics (flat and convex watersheds, drainage conditions), lithological composition and humus content in the upper horizons of arable soil. A qualitative relationship between spring changes in the EVI for arable land and the combination of edaphic factors of agro-landscape functioning is established and the mechanisms that ensure such differences are presented. The use of the EVI distribution patterns is justified in the years with different climatic conditions to identify arable lands with different surface topography and soil characteristics.

scholarly journals Subtype features of humus dynamics in chernozems of the center of the Russian Plain under conditions of long-term agricultural use

2020 ◽  
Author(s):  
A.I. Gromovik ◽  
◽  
N.S. Gorbunova ◽  
I.V. Cherepukhina ◽  
Yu.Yu. Khatuntseva ◽  
...  
Keyword(s):  
Humus Content ◽  
Objective Assessment ◽  
Arable Land ◽  
Russian Plain ◽  
Forest Steppe ◽  
Arable Soils ◽  
Virgin Land ◽  
Agricultural Use ◽  
High Level

The long-term dynamics of the humus content and reserves in the forest-steppe and steppe chernozems of the center of the Russian Plain was studied in a series: virgin land - perennial arable land. To the greatest extent, the transformation of the humus profile of chernozems as a result of plowing is manifested in its upper part. The depth of transformation spread reaches approximately 80-90 cm. In the series of subtypes: podzolic - leached - typical - ordinary chernozems, there are differences in the amount of humus lost. Long-term plowing of these soils leads to the humus content decrease. Therefore, real (t/ha) and apparent (%) humus losses in soils during their long- term plowing can differ significantly. The greatest losses of humus were recorded in leached chernozems – 15 t/ha. In podzolic and ordinary chernozems, the loss of humus reserves was approximately the same and amounted to 13 and 14 t/ha, respectively. Typical arable soils, as a rule, contain 15 t/ha fewer humus reserves than virgin soil. The humus level of chernozems varies significantly in the first years of use, then it stabilizes at a fairly high level according to the new regime of matter and energy circulation in agrocenoses. An objective assessment of changes in the main indicators of the humus state of chernozems during their long-term agricultural use should be carried out not by the percentage of humus but by its reserves, taking into account the corresponding values of the equilibrium addition density.

scholarly journals The Ongoing Greening in Southwest China despite Severe Droughts and Drying Trends

2021 ◽  
Vol 13 (17) ◽  
pp. 3374
Author(s):  
Xin Chen ◽  
Tiexi Chen ◽  
Qingyun Yan ◽  
Jiangtao Cai ◽  
Renjie Guo ◽  
...  
Keyword(s):  
Vegetation Change ◽  
Vegetation Index ◽  
Southwest China ◽  
Vegetation Indices ◽  
Climate Extremes ◽  
Global Scale ◽  
Area Index ◽  
Huge Impact ◽  
Increasing Trends

Vegetation greening, which refers to the interannual increasing trends of vegetation greenness, has been widely found on the regional to global scale. Meanwhile, climate extremes, especially several drought, significantly damage vegetation. The Southwest China (SWC) region experienced massive drought from 2009 to 2012, which severely damaged vegetation and had a huge impact on agricultural systems and life. However, whether these extremes have significantly influenced long-term (multiple decades) vegetation change is unclear. Using the latest remote sensing-based records, including leaf area index (LAI) and gross primary productivity (GPP) for 1982–2016 and enhanced vegetation index (EVI) for 2001–2019, drought events of 2009–2012 only leveled off the greening (increasing in vegetation indices and GPP) temporally and long-term greening was maintained. Meanwhile, drying trends were found to unexpectedly coexist with greening.

scholarly journals Assessment of agro-ecological composition of gray forest soils under the different agricultural use

2021 ◽  
pp. 146-153
Author(s):  
S. Razanov ◽  
V. Melnyk ◽  
B. Nazaruk ◽  
M. Kutsenko
Keyword(s):  
Soil Fertility ◽  
Crop Production ◽  
Soil Analysis ◽  
Humus Content ◽  
Arable Land ◽  
Fruit Production ◽  
Apple Orchard ◽  
Intensive Agriculture ◽  
Agricultural Lands ◽  
Agricultural Use

The article presents the results of the agroecological composition of soils for different agricultural uses. Under modern conditions of increasing intensification of agricultural production, the agroecological condition of soils is deteriorating, which increases the risk of obtaining low–quality products. Along with this, there are various problems, such as loss of soil fertility, increased erosion, groundwater pollution and environmental pollution in general. Therefore, there is a need for constant monitoring of agroecological indicators of the soil in the conditions of intensive agriculture and horticulture. The great importance is the problem of finding reserves to increase soil fertility and improve their agroecological condition. Therefore, regular testing of soil nutrients and factors that have a major impact on their availability are extremely important to achieve sustainable levels of crop and fruit production. The main purpose of the research was to study and analyze agricultural lands: arable land and perennial plantations and the main agrochemical indicators of the soil of the central part of Vinnytsia region during intensive agriculture and horticulture. The object of research is the soils of agricultural lands used under intensive horticulture and crop production. The subject of research is the agroecological indicators of soil. The research was carried out in the farm of Agro–Etalon LLC in the village of Vasylivka, Tyvriv district. The soils of agricultural lands used under orchards (apple orchard) and agricultural crops (wheat after sunflower predecessor) were studied for comparison. According to the results of soil analysis, it was found that the highest difference in the studied indicators was found in the exchangeable potassium (К2О), mobile phosphorus (Р2О5), which was observed more in the soils involved in horticulture compared to the soils of field crop rotations. Farm soils with different agricultural uses were characterized by lower humus content. The highest difference in the concentration of chemical metals was found for molybdenum (Mo) and cadmium (Cd), which were more in the soils used in horticulture.

scholarly journals ON THE INFORMATION CONTENT OF SPECTRAL CHANNELS AND NDVI OF THE LANDSAT 5 TM LANDSAT 7 ETM+ REMOTE SENSING SATELLITE FOR ASSESSING THE STAGES OF FOREST OVERGROWTH OF ABANDONED AGRICULTURAL LANDS

ÈKOBIOTEH ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 178-185
Author(s):  
I.R. Tuktamyshev ◽  
◽  
P.S. Shirokikh ◽  
R.Y. Mullagulov ◽  
◽  
...  
Keyword(s):  
Remote Sensing ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Arable Land ◽  
Vegetation Indices ◽  
Remote Sensing Data ◽  
The Urals ◽  
Landsat 7 ◽  
Landsat 5 Tm ◽  
The Difference

Abandoned arable land is a widespread phenomenon in land use. Methods based on the use of remote sensing data are most suitable for studying and monitoring farmlands overgrown with forest. Multispectral satellite images and vegetation indices can reflect the difference at certain stages of the successional development of fallow vegetation. The aim of the work is to evaluate the informative value of individual channels of medium-resolution images of Landsat satellites and the normalized difference vegetation index (NDVI) for identifying vegetation areas at various stages of reforestation succession on abandoned arable land in the zone of distribution of broad-leaved forests in the Urals. As the source material we used 30 georeferenced relevés of different overgrowth stages made in 2012, and 9 cloudless Landsat 5 TM and Landsat 7 ETM+ images for the period from April to October 2011. Using the data, NDVI and values of three spectral bands (Red, NIR, Thermal) were calculated for the relevé points. The most informative when dividing the stages of reforestation on abandoned fields in the zone of distribution of broad-leaved forests in the Urals were the NDVI vegetation index and the surface temperature estimated by the thermal channel. In addition, the red band can be useful for identifying the initial stage of succession.

scholarly journals CHEMICAL COMPOSITION OF SOD-STRONGLY-PODZOLIC LIGHT-LOAMY SOIL DURING LONG-TERM AGRICULTURAL USE

2019 ◽  
Vol 14 (3) ◽  
pp. 82-86 ◽  
Author(s):  
Ильдус Фатыхов ◽  
Ildus Fatykhov ◽  
Нина Бусоргина ◽  
Nina Busorgina ◽  
Борис Борисов ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Arable Land ◽  
Pollution Level ◽  
Loamy Soil ◽  
Inductively Coupled ◽  
Pollution Indicator ◽  
Udmurt Republic ◽  
Agricultural Use ◽  
And Tungsten

Mass spectral method with inductively coupled plasma (MS) and atomic emission method with inductively coupled plasma (AES) at ASIC VNIIMS named after N.M. Fedorovskiy 53 chemical elements and 8 oxides in sod-strongly-podzolic light loamy soil were determined. Soil samples were taken from horizons А1 (deposit) and Ап (arable land) during long-term agricultural use in SKhPK named after Michurin of Vavozhskiy district of the Udmurt Republic. Relative to horizon А1 (deposit), in the plow layer there is a higher content of zinc, cadmium and lead - elements of the toxicity class 1, copper - element of the toxicity class 2, barium, strontium and tungsten - elements of the toxicity class 3. In accordance with the requirements of the hygienic standard GN 2.1.7.2041-06, only the arsenic content exceeded maximum permissible concentration. Among the oxides in the arable layer Ап, an increased content of magnesium and iron oxides was noted, compared with their concentration in the А1 horizon (deposit). In the course of the study, it was found that the studied sod-strongly podzolic light loamy soil with long-term agricultural use is characterized by an increase in the content of zinc in the arable layer by 16.8, lead by 0.4, cadmium by 0.11 μg/g, barium by 33.1, strontium by 3.1 and tungsten by 0.11 μg/g relative to their concentration in the А1 horizon (deposit). According to the content in the arable layer of heavy metals sod-strongly podzolic light loamy soil SKhPK named after Michurin of Vavozhskiy district of the Udmurt Republic can be classified as soil with a low level of pollution. According to the total pollution indicator, the soil corresponds to the category of permissible pollution level.

Long-term changes in the North Sea ecosystem

2001 ◽  
Vol 9 (3) ◽  
pp. 131-187 ◽  
Author(s):  
R A Clark ◽  
C LJ Frid
Keyword(s):  
North Sea ◽  
Primary Productivity ◽  
Trophic Levels ◽  
Benthic Fish ◽  
Nutrient Inputs ◽  
Climatic Fluctuations ◽  
The North ◽  
Long Term Changes ◽  
The North Sea

Long-term data on the North Sea ecosystem are available for phytoplanktonic, zooplanktonic, benthic, fish, and seabird communities. Temporal changes in these have been examined by numerous researchers over the course of the 20th century, their main objective being to determine how the interannual dynamics of these communities are controlled. Ultimately, long-term changes in the North Sea ecosystem appear to be driven by two wide-ranging, but separate processes. In the northern, western and central areas of the North Sea, long-term changes are predominantly influenced by climatic fluctuations. Here, primary productivity during a particular year is related to the effect of weather on the timing of stratification and the resulting spring bloom. In the southern and eastern areas of the North Sea, the lack of stratification and the large inputs of nutrients mean that primary productivity is more strongly influenced by variations in anthropogenic nutrient inputs, and is only weakly related to climatic variation. Long-term changes at higher trophic levels (zooplankton, benthic, fish, and seabirds) are generally affected by fluctuations in their food source (i.e., the lower trophic levels), although because of the high complexity of the North Sea ecosystem there are many exceptions to these general patterns. However, the weight of evidence shows that long-term changes in the ecosystem may ultimately be related to long-term changes in either climate or nutrients, although the long-term dynamics of certain taxa and communities do show evidence of being influenced by both anthropogenic factors and (or) internal factors such as competition and predation. Key words: long-term changes, North Sea, time series, climate change, ecosystem functioning, anthropogenic impacts.

Long-term changes of surface albedo and vegetation indices in north of Iran

2020 ◽  
Vol 13 (3) ◽  
Author(s):  
Ali Akbar Sabziparvar ◽  
Seyedeh Mina Mousavi Ghahfarokhi ◽  
Hossein Torabzadeh Khorasani
Keyword(s):  
Surface Albedo ◽  
Vegetation Indices ◽  
Long Term Changes ◽  
North Of Iran

scholarly journals THE ESTIMATE OF THE SPATIAL-TEMPORAL FEATURES OF VEGETATION COVER OF KAZAKHSTAN BASED ON TIME SERIES SATELLITE INDECES IN 2000-2015

2016 ◽  
Vol XLI-B8 ◽  
pp. 1067-1071
Author(s):  
I. Vitkovskaya ◽  
M. Batyrbayeva ◽  
L. Spivak
Keyword(s):  
Time Series ◽  
Vegetation Index ◽  
Vegetation Indices ◽  
Weather Conditions ◽  
Condition Index ◽  
Negative Trend ◽  
Positive Trend ◽  
High Productivity ◽  
Temporal Features

The article presents the evaluation of spatial-temporal characteristics of Kazakhstan arid and semi-arid areas' vegetation on the basis of time series of differential and integral vegetation indices. It is observed the negative trend of integral indices for the period of 2000-2015. This fact characterizes the increase of stress influence of weather conditions on vegetation in Kazakhstan territory during last decade. Simultaneously there is a positive trend of areas of zones with low values of IVCI index. Zoning of the territory of Kazakhstan was carried out according to the long-term values of the normalized integral vegetation index, which is characteristic of the accumulated amount of green season biomass. Negative trend is marked for areas of high productivity zones, long-term changes in the areas of low productivity zones have tend to increase. However long-term values of the area of the middle zone are insignificantly changed. Location boundaries of this zone in the latitudinal direction connects with a weather conditions of the year: all wet years, the average area is located between 46°- 49°N, and the all dry years - between 47°30'- 54°N. The map of frequency of droughts was formed by low values of the integral vegetation condition index which calculated from satellite data.

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