The Development of a Model of Economic and Ecological Evaluation of Wooden Biomass Supply Chains

This scientific publication is dedicated to the development of scientific methodological and practical recommendations about the formation of ecologistics approaches towards usage of the energetical potential of wooden biomass as a promising trend of economic activity subject development. The hierarchy of ecological chain build-up is established, which will allow one to effectively organize the logistics of supply of biomass to the place of energy production. The methodological approaches to modeling of economic and ecological evaluation of wooden mass supply chain were improved. It is aimed to the calculation of expanses and harmful emissions that depend on specific logistics processes in implementation of perspective actions of collection and recycling of wooden biomass and substitution of non-renewable energy sources by it, which, on the one hand, analyzes the actual state of affairs of knowledge in the field of ecological processes evaluation, and on the other hand, however, identifies restrictions on the amounts of potential provision of biomass. Due to the proposed model of economic and ecological evaluation of the supply chain of wooden biomass and the development of software with a database that covers information on specific logistics processes, it will be possible to conduct economic and ecological evaluation on each step of the logistics chain, present specific processes in cash equivalents, depict ecological effectiveness, and identify the most vulnerable points of the logistics system, opening vast opportunities for improvement of other supply systems.

Temporal and spatial evolution of NDVI in seasonal freezethawing area of China

Vegetation is the most important composition part of land ecological system and is sensitive to the change of global climate. The characteristic of nearly 37a temporal and spatial evolution of NDVI in China’s seasonal freezing-thawing area was studied focusing on the target of China’s seasonal freeze-thawing area, utilizing methods of GIS spatial analysis and mathematical statistics and based on the dataset of AVHRR GIMMS NDVI and MODIS NDVI during 1982 to 2018. It showed that nearly 37a NDVI in China’s seasonal freezing-thawing area fluctuated with an increasing trend in the range of 5.292~6.635. Besides, the coverage degree of vegetation increased dramatically. Sandy land developed from the direction of desertification to oasisization. This work provides scientific evidence for the sandy land ecological evaluation of China’s seasonal freezing-thawing area and regional sustainable development. Bangladesh J. Bot. 50(3): 847-853, 2021 (September) Special

Effect of Ecological Environment on Outdoor Sports

The quality of ecological environment directly affects the effect of outdoor exercise and outdoor physical education. In this study, the principles of integrity, dynamic, systematic and difference of ecology are integrated into the process of outdoor exercise and outdoor physical education in Colleges and universities. This paper attempts to comprehensively reflect on the impact of the current ecological environment on outdoor physical exercise and teaching effect from the perspective of ecology, so as to reform and improve the current outdoor sports mode. Based on the theories of physical education, pedagogy, ecology and other related disciplines, this paper studies the influence of ecological environment on outdoor exercise and outdoor physical education teaching mode in Colleges and universities. This paper analyzes the above problems from the perspective of ecology, and draws the following conclusions: innovation and optimization of outdoor physical exercise and teaching mode in Colleges and universities from the perspective of ecology should adhere to the guiding ideology of lifelong physical education and people's all-round development. It is necessary to establish the concept of ecological evaluation, give full play to the subjective initiative of evaluation objects, and establish multiple evaluation standards. By comprehensively innovating and optimizing the college physical exercise teaching mode from the various elements of the teaching mode, we can build an ecological college outdoor physical exercise and teaching mode that is more suitable for the construction of ecological civilization.