Undergrowth

About: Undergrowth is a research topic. Over the lifetime, 795 publications have been published within this topic receiving 11911 citations. The topic is also known as: understorey & underbrush.

Forage yield and nutritive value of naturally growing Brachiaria decumbens as undergrowth to an aroeira tree stand in a silvopasture system

Abstract: This study evaluated the forage yield and feed chemical composition of a Brachiaria decumbens natural pasture as undergrowth to a Myracrodruon urundeuva (aroeira) tree stand in a silvopasture system at UNESP/Ilha Solteira, Selviria, Mato Grosso do Sul, Brazil. Sampling was conducted in a completely randomized block design with a factorial scheme of two plots and two sub-plots, with plots as the light regimen (full sunlight or shade from aroeira trees, spaced 3 × 3 m) and sub-plots as the grazing rotation scheme (pre-grazing and post-grazing). Sampling was performed along the four seasons of a year in four replicates. Canopy height, forage mass, morphological composition, nutritive value, and forage digestibility (whole-plant sample) were evaluated. Forage mass was significantly higher in the full sun area (1,306 kg DM/ha) than in the shaded site (727 kg DM/ha). Forage yield was low during the experimental period (1,529 and 58 kg/ha in the full sun and shaded sites, respectively). The nutritive value of B. decumbens was not significantly different between light regimens. Growing B. decumbens as undergrowth in aroeira stands may be an option in areas where the trees still occur, but other planting densities should be examined. Key words: Forage yield, Myracrodruon urundeuva, rising plate meter, shading, sward height.

Estimation of Carbon Storage of Two Dominant Species in Deciduous Dipterocarp Forest in Chatthin Wildlife Sanctuary, Myanmar

Abstract: The carbon storage of two dominant species, vegetation and litter layer were assessed in Deciduous Dipterocarp forest in Chatthin Wildlife Sanctuary, Myanmar. A total of 37 tree species was found in the study area. Among the tree species, two dominant species were Dipterocarpus tuberculatus Roxb., and Shorea obtusa Wall. Biomass allometric equations for estimating the aboveground biomass were developed based on direct measurements of 40 individuals of those two species while allometric equations for estimating the belowground biomass were also developed through measuring 10 sample trees of those species. The carbon content of D. tuberculatus was 24.15 ton ha-1 while that of S. obtusa were 12.25 ton ha-1, respectively. In addition, the carbon contents of undergrowth vegetation and litter were 8.12 ton ha-1 and 3.7 ton ha-1, respectively. The best fit equation for estimating total biomass of D. tuberculatus was Log Y = 1.6058 + 0.9631 Log X, where R2 = 0.97 and that of S. obtusa was Log Y = 1.8069 + 0.9377 Log X, where R2 = 0.94. The equations derived from this study can be applied to estimate the carbon storage of D. tuberculatus and S. obtusa in Deciduous Dipterocarp forest in Myanmar.

Study on Diversity of Undergrowth Plant Community in Cibagou Nature Reserve

Abstract: The forest community diversity along the altitudinal gradient was analyzed in the Cibagou National Nature Reserve. Results showed that the forest types of Cibagou Gorge could be divided into six types: Castanopsis hystrix forest; camphor and acer mixed forest, blue Japanese oak broad-leaved mixed forest, blue Japanese oak forest, Populus simonii mixed forest; Quercus aquifolioides forest. The total coverage of undergrowth vegetation altitude was the lowest at 1749 m, only 30%, and plant species numbers in the sample was only 5. The total coverage of the plant was the highest at 2327 m altitude, the value was 95%, and the number of species in experiment plot was 14. The species richness of Margalef increased first and then decreased with the increase of altitude gradient at 1749 m to 2880 m, and the Shannon-wiener species diversity index increased, but the difference was not significant, Pielou species evenness and Sheldon species evenness index decreased first and then increased with altitude.

Self-renewal of tree plants in the conditions of the ecotope of the forest park of the Friendship of the city of Dnipro

Abstract: Every year the role of parks in large industrial cities becomes more relevant. The consequences of anthropogenic impact are extremely powerful and diverse. Moreover, nature is trying to restore a clean ecological space on its own, so parks in cities are the driving force in the struggle for survival. The green lungs of the city create a qualitatively better climate, give the opportunity to rest, recuperate, give a feeling of peace, aesthetic pleasure and not only from the local flora, but also from unusual plants that inspire and cheer up, which is important for today's rapid pace of life. Therefore, the issue of aboriginal and introduced flora of parks will remain relevant. The species composition of seed self-regeneration of woody plants in trial areas 1, 2, 3 of the Druzhby Forest Park of Dnipro was analyzed in order to determine the ratio of introduced and autochthonous species and whether introduced species pose a threat to aboriginal flora. It has been investigated whether the distribution of introduced species contributes to the process of biotic homogenization using the Pearson correlation coefficient, the Jacquard index between indigenous species and introduced species. As a result of the research it was established that in the Druzhby Forest Park artificial stands are capable of forming a sufficient number of viable undergrowth of autochthonous and introduced species, of which aboriginal species dominate mostly. The ratio of indigenous species to introduced in Trial Areas 2, 3 is 66.5–65.5% and 33.5–34.5%, respectively. There is no competition between autochthonous and introduced species in these trial areas. Each tree species has adapted well to the conditions of the ecotope and to the conditions of its place of growth. Bioecological features of wood species in the plantations are not an obstacle to the development of the internal space of the ecotope. However, in Trial Area 1, competition was found between indigenous and introduced species, where introduced species make up 80.3% of the total number of restored woody plants. Therefore, longer-term monitoring and measures to curb the spread of introduced species is needed.