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.

Carbon storage and distribution in poplar and poplar-crop intercropping forests

Abstract: Carbon storage and distribution in poplar and poplar-crop intercropping forests were studied in Dafeng Farm,north of Jiangsu Province. We concluded that the carbon storages of poplar and poplar-crop agro-forestry ecosystem were( 101. 59 ± 8. 1) and( 116. 65 ± 10. 3) t/hm2 respectively. And the soil and wood carbon storage were more than 90% of the total in both ecosystems. The carbon storage of undergrowth vegetations and litter-fall was about 6% in poplar-crop agroforestry ecosystem,twice of that in poplar forest. There was significant difference in soil carbon storage between poplar and poplar-crop agro-forestry ecosystem within the soil layers 10 ~ 25 and 50 ~ 100 cm. Carbon storages in the harvested parts( woods and undergrowth vegetations) of poplar forest were significantly lower than that in poplar-crop agro-forestry ecosystem. The carbon return in litter-fall showed no differences between two ecosystems. The results showed the agro-forestry ecosystem had relatively a high potential in carbon absorption and sequestration.

The Forest Regeneration after Gregarious Flowering of Bamboo (Cephalostachyum pergracile) at Mae Klong Watershed Research Station, Kanchanaburi

Abstract: The forest regeneration after gregarious flowering bamboo ( Cephalostachyum pergracile) in the Mixed deciduous forest was carried out at Mae Klong Watershed Research Station, Kanchanaburi Province in 2002. A permanent plot of 50 m · 50 m was established and the 24 litter traps with mouth size of 0.5 m 2 , each adjacent to a seedling quadrat (1.5 m · 1.5 m) were set in a regular matrix with 10 m distance between each one. Seedling census was done every two weeks. At each census all new tree and bamboo seedlings were tagged, identified and seedling mortality were also recorded. The results showed that the forest structure was dominated by undergrowth bamboo in the middle layer. Cephalostachyum pergracile had gregarious flowered in November 2001 which had the clump and culm density as 0.06 m -2 and 11.10 clump -1 , while, the average seed production was 2,442 ± 1,243 seed/m 2 . Forest fire occurred after bamboo died and burnt all above ground parts of them in which they provided large vacant spaces to forest regeneration. Both forest tree regeneration and bamboo dynamics showed high corresponded to soil moisture content. The annual survival rate of bamboo seedlings was quite high, 58 %, with the annual average of growth height rate about 22.8 ±1.45 cm. The seedling emergence of dominance species was very high rate, especially in the first year after bamboo died and followed by forest fire. Thus, both the bamboo undergrowth and frequent forest fires could be the dominant factors that prevent the continuous of forest regeneration.

Diversidad florística en arreglos agroforestales asociados a cacao (Theobroma cacao), de cuatro municipios del sur colombiano

Abstract: Companion planting with other plant species in a production system, is a way; to keep, integrates and articulates aspects of the natural environment –ecological– and the economic and social environments. In this regard, one of the most successful agro forestry systems has been the one associated to cocoa cultivation, given the condition of the plant species Ombrofila undergrowth, which requires the use of permanent and semi-permanent shadows. However, alternatives should be presented to producers as they are the ones that decide how and which species to associate with their cultivation, which vegetation type to keep associated with, knowing in advance the horizontal and vertical structure, composition, degree of floristic similarity and the relationship of the structure of production and ecosystem services. This study was conducted in agro­forestry systems associated to cocoa cultivation, located in four municipalities in the north of Huila, southern Colombia. Forty plots (20 x 50 m) type Gentry were established, and 51 samples of lifting of vegetation between June and August 2015 were taken, all individuals with a diameter at breast height (DBH) were registered in an inventory ­ 1.30 m greater than 2.5 cm, 2820 individuals were registered in total, corresponding to 74 species distributed in 61 genera and 29 families. The richest family regarding the number of genera and species is Fabaceae (10 genera / 13 species), in terms of genus Ficus plant is the richest with four (4) species.

Comparative Study for Undergrowth Vegetation Biomass of Eucalyptus Plantations and Natural Forest

Abstract: Through a comparative study for undergrowth vegetation biomass of eucalyptus plantation and natural forest in Pu'er City,the results showed that under the conditions of the same site,eucalyptus plantations undergrowth vegetation biomass was less than the natural forest vegetation biomass,but the herb layer of natural forest undergrowth than in the major herb layer biomass ratio,to lead this result of the main reason for eucalyptus plantation forest decline in plant diversity.So,when introduced the eucalyptus,we should take into account ecological problems brought about by that.The research of forest biomass for the balanced development of the ecological environment and economic forest of eucalyptus provided a theoretical basis.