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.

The Annual Variation of Aboveground Biomass of Undergrowth Vegetation and Its Impact Factors in the Area of Conversion of Cropland to Forest in Duolun County

Abstract: Based on the aboveground biomass of undergrowth vegetation and climate observations in Duolun County from 2005 to 2010,the relationship of annual variation of aboveground biomass of undergrowth vegetation,vegetation cover,density,height and annual precipitation have benn analyzedThe regression model of aboveground biomass of undergrowth vegetation and its impact factor has been builtThe result shows: The aboveground biomass of conversion of cropland to forest in different years is significantly different,biomass increases significantly as the increasing of the years of conversion of cropland to forestThe aboveground biomass of undergrowth vegetation in the area of conversion of cropland to forest has strong correlation with the years of conversion of cropland to forest,vegetation density and heightThe biomass increases as the increasing of the years of conversion of cropland to forest,vegetation density and heightThe aboveground biomass in the area of conversion of cropland to forest can be predicted by the linear relationship of variation of vegetation height

Landscape Ecological Studies on Structure and Dynamics of Plant Populations on Vegetation-Landscape Patterns in Rural Regions: I. The Effect of Patch Shape on the Initial Population Structure of Pine and Oaks

Abstract: Secondary vegetation. the holistically integrated system of nature and human being, is the complicated ecosystem that is composed of natural and man-created factors. Understanding the ecological function of secondary vegetation supplies us many important informations for sustainable landscape management and ecological restoration planning. In this research, we tried to examine the shape effect of vegetation patch on early structure of populations of pine and oaks. Moreover. we also tried to clarify the ecological functions of patch edge by exploring the patch effect on germination using patch index. In addition, we present the landscape structure of man -made vegetation of our study area, and setting experimental design of research. Vegetation landscape of study area is typical human disturbed landscape mainly composed of disturbance patches. Vegetation types of graveyard and managed pine forest were controlled by periodically repeated management. However, current seedlings of pine occurred well at both vegetation types. Presence of both saplings were more controlled in managed pine forest (PDM) and graveyard (G) than those of undergrowth (PD) and forest edge (FE) with canopy trees. The number of pine seedlings increased with patch size and patch perimeter. That of oak seedlings was, however, not significantly different. Larger graveyards provided higher light availability for germination of pine seedlings. We think, however, most seedlings of both species in the large sized graveyards without shade will die more easily than that of small sized ones before rainy summer. Relationships between patch shape and germination of two woody species cannot be exactly explained enough yet in these results. More informations on spatial interaction of the total species with differently sized patches are necessary to solve the concept of patch effect on species colonization.

Studies on β-diversity index of undergrowth plant in Chinese fir plantation

Abstract: Undergrowth of plants in a Chinese fir plantation in different growth stages and site indices has been quantitatively analysed by using β diversity index formulas. The results showed that the values of β diversity index of undergrowth plant in different growth stages and site indices are obviously different, in which the difference between 56 year old and 3 year old forests is greatest, and the closer to 56 year old in growth stages, the smaller in β diversity index values, in each Chinese fir community, the difference of β diversity index values of undergrowth plant between 14 and 18 site indices is also great.

Study on Spatial-Temporal Changes on Undergrowth the Plantation Soil Bulk Density and Soil Porosity of Quanshan Nature Reserve in Xuzhou

Abstract: The soil bulk density in four sampling areas in Platycladus orientalis plantation forests and Robinia pseudoacacia forest of Quanshan Nature Reserve in Xuzhou are determined and compared with that in bare area.The results show that there's no rule of the variation between undergrowth soil bulk density and soil porosity and the depth;while the rule of the variation of undergrowth soil spatial structure is clear.Regardless at what time the soil bulk density gets larger with the soil gets deeper while the soil porosity gets smaller with the soil gets deeper,besides,the effects of Platycladus orientalis plantation forests is larger than that of Robinia pseudoacacia forest.Besides,the soil bulk density of park greenery plot soil is larger than that of bare area and the soil bulk density gets smaller by the humus of plantation,which makes the penetration and retentivity fertilizer get better.

Queer Undergrowth: Weeds and Sexuality in the Architecture of the Garden

Abstract: This article considers the queer roles of weeds and undergrowth in the architecture of the garden. With the garden defined as a site where human pleasure is ordered and controlled, undergrowth is i...