Формирование подстилки пойменных лесных биогеоценозов с участием Acer negundo L.

Abstract

The article presents the results of the influence of box elder (Acer negundo L.) litterfall on the forest litter formation in floodplain forest communities. The research object was plant litter collected from different sites of phytogenic fields of A. negundo natural stands growing in the floodplain of the Tom River. Sampling was carried out according to the three types of crown density. The outer zone of scattered trees was chosen as a control sample. The vegetation cover was described, and the dominant plant species and their total projective cover were determined within the subcrown, near-front and outer zones of the tree phytogenic field. Just before the research analytical samples were isolated; they were dried to air-dry condition and weighed in order to determine the proportion of each plant fraction. Content of polyphenolic compounds and lignin was determined in the samples. The results’ analysis had shown that the crown density of Acer negundo L. population, as well as the content of mineral and organic compounds of plant litter, influences the formation of floodplain forest communities’ litter. The most intensive mineralization of litter in the soil, especially in the subcrown zone, is found under scattered trees in sparse woodland. Probably this is due to the increased content of nutrients and total absorbed bases, as well as a higher phytomass accumulation, and minimum content of polyphenols and lignin, in comparison with the forest litter of trees from the other studied groups. The research results can be used for the monitoring of natural ecosystems. For citation: Tsandekova O.L., Ufimtsev V.I. Formation of Floodplain Forest Biogeocenosis Litter with the Participation of Acer negundo L. Lesnoy Zhurnal [Forestry Journal], 2019, no. 3, pp. 73–81. DOI: 10.17238/issn0536-1036.2019.3.73Funding: The research was carried out within the framework of the state assignment of the Federal Research Center of Coal and Coal Chemistry of the Siberian Branch of the RAS (project no. 0352-2019-0015)