Geographical Background of the Bhabar-Tarai Belt of Lower Assam District, India

From geo-ecological point of view, the BhabarTarai belt bears immense significance as it considers as shelter belt for diverse species. It may be mentioned as a hub of interaction among all biota that holds life to sustain. Being a rich domain in respect of plant and animal species, the belt is composed by pebbles, sand, and silt with thick forest cover and ranges from dry disappearance river bed topography to wet, marshy land one. With an area of 3994.25 sq.km, Lower Assam district is also flourished by this notable structure of physiography out of which 89.24% are Tarai followed by 10.75% of Bhabar. Most of the area is covered by BTAD areas along withsignified Assam-Bhutan Boarder that support a great number of people with their associated livelihood compositions. For more details, there has made an attempt of analysis this important zone of physical features along with adopted form of belongingness of people to the area as well. The paper is prepared on the basis of both primary and secondary data and findings are represented with the help different digital cartographic techniques.

Fall webworm — Hyphantria cunea (Drury, 1773) in Kharkiv region

Monitoring from 2014 have revealed a new focus of the fall webworm in Kharkiv district of Kharkiv region, in 1.7 km segment forest shelter belt of Acer negundo L. In four years (2014—2017) the number of the nests of fall webworm increased more than 60 times. The data on pest morphological characteristics and phenology have been provided. It was found that the weather conditions of 2016 contributed to the accelerated development of the Fall which Pasted 47 and 30 days in the finst and second generation respectively.

Space structure of forest shelterbelt in Lugansk region agrocenosis

It is known that field-protective afforestation is carried out on agricultural lands for protection from abiotic and biotic factors such as dry winds, droughts, soil erosion, and also anthropogenic ones. To study spatial structure of the field-protective belts, test areas were laid in accordance with OST 56-69-83, where the following species were studied: species composition of woody-shrubby and grassy vegetation, continuous enumeration of forest stands. Based on the results of the enumeration taxation, composition of shelter belt, diameter and average height, and state of the stand according to Kraft were determined. There were no archival data on the landing time and the age of investigated forest belts. Field protection zone in the vicinity of Zolotarevka village is represented by the stand of the second generation of both seed and vegetative origin. It is located in Stanichno-Lugansky district of Lugansk region (Ukraine), in the vicinity of Zolotarevka village. Geographical coordinates of the location of the village are 48.90417º N, 39.79361º E. The main tree species (edificator) is represented by European white birch (Betula pendula Roth), planted in rows – 5 rows. The belt is not homogeneous in tree species, although initially it was created only from birch plants. In the first third of the forest belt in one vertical tier the birch is alternating with Norway maple, and then in the middle part there is European white birch. The main tree species in the second forest belt is the acicular plaque (Acer platanoides L.). At the point of contact of plants of indicated cenoses, despite the presence of a break in the work of engineering, there is mixing of these species in the first shelter belt, that is,Norway maple cut out other species of the indicated cenosis, including birch. Having studied the spatial structure and species diversity of plants of all life forms of field shelter belts (Zolotarevka village (Stanichno-Luhansky district of Lugansk region) one can conclude that it is necessary to consider these ecosystems in a sozological aspect.

Influence of plantation of a shelter-belt on component of organic carbon in the Taklimakan desert over last decade

The soils were collected from the Taklimakan Desert Highway shelter-belt with different planting years in Xinjiang, northwest of China. The soil organic carbon stork (SOCstork) in each layers. By chemical and physical pretreatment, we measured four carbon passive organic carbons, i.e., microaggregates organic carbon(OCMIA), humus organic carbon (OCHS), carbon resistance to oxidation (OCNaClO) and acid hydrolysis (OCHCl). The results showed that the OC and SOCstork was decreased with soil depth mainly in 0-50 cm. The artificial vegetation have more influence on TOC, OCMIA and OCHS than OCNaClO and OCHCl. The Tamarix chinensis shelter-belt is the most helpful for carbon sequestration in sandy soil and stabilization in surface layer than Calligonum mongolicunl and Haloxylon ammodendron.