Mowing Is More Harmful to Soil Than Grazing
The cycle of organic carbon in the meadow soil depends to a great extent on how the soil is managed. Meadows are often mowed or used as pastures, and both these practices can lead to unwanted damage and tearing of the main aerial parts of plants. However, it is still not clear which process is more harmful to the soil. A team of biologists including a scientist from RUDN University analyzed soil samples taken at experimental land plots in Western France that have been used as pastures or regularly mowed for 13 years. Using mass spectrometry and gas chromatography, the team measured the levels of organic carbon and other compounds and analyzed microbial activity in the samples. The soil of the pasture turned out to contain more carbon than that of the mowed meadow. According to the biologists, the sources of carbon in the pastures are more diverse and easily available which supports the activity of microorganisms. 50% to 70% of all carbon consumed by grazing animals returns to the soil in the form of manure within several days. This makes microbial functioning more efficient and increases carbon reserves in the soil. In the case of mowed meadows, the loss of soil nutrients has to be compensated by mineral fertilizers that stimulate enzyme activity, thus accelerating the decay of organic compounds. This might have a negative impact on the environment.
“According to our study, mowing and grazing have a different effect on the biogeochemical functioning of meadow soils. Although both systems are generally beneficial for organic carbon reserves, moderate cattle grazing is more advantageous because it leads to better soil quality and more efficient microbial functioning,” said Evgeniya Blagodatskaya, a Ph.D. in Biology and a senior researcher at the Center for Mathematical Modeling and Design of Sustainable Ecosystems at RUDN University.
The results of the study were published in the Applied Soil Ecology journal.
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A Center for Green Diplomacy was created based on the RUDN Institute of Environmental Engineering. Among the goals is the integration of the results of scientific and practical activities into the development of international relations in the environmental sphere. The center's specialists will also accompany the corporate sector in solving various environmental problems.
RUDN summarized the results of the scientific competition "Project Start: work of the science club ". Students of the Faculty of Physics, Mathematics and Natural Sciences have created a project for a managed queuing system using a neural network to redistribute resources between 5G segments. How to increase flexibility, make the network fast and inexpensive and reach more users — tell Gebrial Ibram Esam Zekri ("Fundamental Computer Science and Information Technology", Master's degree, II course) and Ksenia Leontieva ("Applied Mathematics and Computer Science", Master's degree, I course).