scholarly journals Restoration of degraded sites with suitable tree species in the Mid-hills of Nepal

2016 ◽  
Vol 23 (2) ◽  
pp. 3-13
Author(s):  
R K Jha ◽  
S K Baral ◽  
R Aryal ◽  
H B Thapa
Keyword(s):  
Exotic Species ◽  
Ecological Restoration ◽  
Tree Species ◽  
Block Design ◽  
Robinia Pseudoacacia ◽  
Melia Azedarach ◽  
Degraded Land ◽  
Growth And Survival ◽  
Community Forests ◽  
Exotic Tree

 Land degradation is a major challenge in Nepal. A lot of degraded land is available within the Community Forests in the Mid-hills which are being aimed to be utilized for ecological restoration as well as supporting livelihoods of the local people. In this context, the study was conducted in the Chautaradanda Community Forest (27°44’05’’ N and 85o04’60’’ E) of Thakre Village Development Committee of Dhading District in the lower Mid-hills of Central Nepal to test the survival capacity and growth performance of different tree species (native, naturalized as well as exotic) that can be used for the rehabilitation of degraded sites. Firstly, Stylo (Stylosanthes spp.), a leguminous grass, was introduced on a degraded site for enriching nutrients in June 2008. Secondly, six different native, naturalized as well as exotic tree species (Sapindus mukorossi, Prunus cerasoides, Choerospondias axillaris, Melia azedarach, Pinus patula and Robinia pseudoacacia) were planted in a randomized complete block design with 4 blocks (6 species × 4 blocks) in July 2008. The results showed that the growth and survival rate of exotic species, P. patula was outstanding; however, the performance of its native and naturalised counterparts P. cerasoides, C. axillaris and M. azedarach was found to be satisfactory. R. pseudoacacia was not found to be a suitable species for rehabilitating degraded sites in the lower Mid-hills of Nepal. Therefore, it would be wise to select the native or naturalized species for the rehabilitation of degraded sites in the Mid-hills, as sometimes the introduction of exotic species may have pessimistic ecological consequences; however, P. patula can be used as it has not shown any invasive nature since its introduction (around 1980s) in the Mid-hills of Nepal. Hence, the study shows the possibility of introducing the tree species such as P. cerasoides, M. azedarach and C. axillaris for ecological restoration of degraded sites in the Community Forests in the Mid-hills of Nepal.Banko Janakari, Vol. 23, No. 2

scholarly journals Introduction of Alien Tree Species and Its Influence on Floristical Composition and Vegetation Structure of Acidophilous Oak Forests: the Experimental Plots in the Zielonka Forest

2011 ◽  
Vol 7 ◽  
pp. 177-190 ◽  
Author(s):  
Halina Ratyńska ◽  
Marian Grodzki ◽  
Barbara Waldon ◽  
Ewa Wachowiak
Keyword(s):  
Exotic Species ◽  
Tree Species ◽  
Vegetation Structure ◽  
Actual Condition ◽  
Oak Forests ◽  
Oak Forest ◽  
Forest Sites ◽  
Exotic Tree ◽  
Phytosociological Relevés ◽  
Experimental Plots

In 1879 Schwappach first established 54 experimental forest plots on habitat of acidophilous oak forest Calamagrostio-Quercetum in the Zielonka Forest near Poznań, on which 20 exotic tree species were cultivated. Until this day 32 of the mentioned forest sites have been preserved and today only 9 species are present there. The aim of the study was to determine actual condition of the experimental plots, a description of their flora and vegetation, as well as a comparison with other test plots situated in the direct neighbourhood. Basing on 63 phytosociological relevés, an influence of exotic species plantings on the structure of vegetation and local biodiversity was assessed. Floristic richness of both experimental plots (88 species), as well as their direct neighbourhood (68) was recognised, along with the geographical-historical groups spectrum and species affiliation to phytosociological classes.

Monitoring of forest components reveals that exotic tree species are not always invasive in areas under ecological restoration

2020 ◽  
Vol 192 (10) ◽  
Author(s):  
Vinícius Londe ◽  
Hildeberto Caldas de Sousa ◽  
Maria Cristina Teixeira Braga Messias
Keyword(s):  
Ecological Restoration ◽  
Tree Species ◽  
Exotic Tree

Forage palatability of Broussonetia papyrifera an invasive species in Ghana: Relative preference and palatability by sheep and goats

2018 ◽  
Vol 2 (2) ◽  
pp. 63-70 ◽  
Author(s):  
R. Obour
Keyword(s):  
Invasive Species ◽  
Leucaena Leucocephala ◽  
Condensed Tannin ◽  
Block Design ◽  
Wet Season ◽  
Broussonetia Papyrifera ◽  
Sheep And Goats ◽  
Relative Preference ◽  
Exotic Tree ◽  
High Level

Broussonetia papyrifera is an exotic tree widely grown for paper production. Due to its prolific regeneration it has invaded forestcanopy gaps and degraded farmlands and has now become an invasive species in Ghana. In enhancing its value for use the plantwas evaluated as potential forage for grazing animals vis-à-vis other two existing forage plants: Ficus exasperata and Leucaenaleucocephala.The study assessed the palatability and preference of Broussonetia papyrifera using sheep and goats for the wet anddry seasons.The species were assessed in indoor pen feeding trials using eight-unit (3×3 m) pens with the cafeteria method.The amount of forage offered was 100g (fresh material) in all instances for each species and for ten minutes. Adesign basedon 3×2×2 factorial in Randomized Complete Block Design (RCBD) was used to test the differences in palatability betweenthe three forage species.Results revealed that palatability was higher (P<0.05) in Leucaena leucocephala compared with Ficusexasperata and Broussonetia papyrifera for sheep and goats across seasons. The trend shown might be the result of the effectsof familiarity with the Leucaena leucocephala since animals tend to select plants that are familiar than newly introduced andunfamiliar plants. The study also revealed high level of condensed tannin (CT) in Broussonetia papyrifera which might haveinterfered with forage intake by the animals.There were no significant differences in palatability of Broussonetia papyrifera forgoat in both dry and wet season interactions and Ficus exasperata for goat in both dry and wet season interactions (P>0.05).Thestudy concluded that Broussonetia papyrifera could be a potential feed for both sheep and goats across seasons.The researchrecommended that livestock farmers should incorporate Broussonetia papyrifera feed into their programmes for both sheep andgoats and should be introduced to animals from infancy so that it may become a familiar feed for them.

Naturalized Exotic Tree Species in Puerto Rico

1991 ◽  
Author(s):  
John K. Francis ◽  
Henri A. Liogier
Keyword(s):  
Puerto Rico ◽  
Tree Species ◽  
Exotic Tree

Naturalized Exotic Tree Species in Puerto Rico

1991 ◽  
Author(s):  
John K. Francis ◽  
Henri A. Liogier
Keyword(s):  
Puerto Rico ◽  
Tree Species ◽  
Exotic Tree

scholarly journals Fertilization and Shading Trials to Promote Pinus nigra Seedlings’ Nursery Growth under the Climate Change Demands

2021 ◽  
Vol 13 (6) ◽  
pp. 3563
Author(s):  
Marianthi Tsakaldimi ◽  
Panagiota Giannaki ◽  
Vladan Ivetić ◽  
Nikoleta Kapsali ◽  
Petros Ganatsas
Keyword(s):  
Tree Species ◽  
Block Design ◽  
Pinus Nigra ◽  
Fertilization Rate ◽  
Early Growth ◽  
Climate Scenarios ◽  
Northern Greece ◽  
Randomized Block Design ◽  
Below Ground ◽  
High Fertilization

Pinus nigra is one of the most widely used tree species for reforestation within its geographical distribution, as well as being a potential substitute for other tree species in Central Europe under future climate scenarios. P. nigra is transplanted into the field as two-year or three-year old seedlings because of its relatively low growth rate in the nursery. This study investigated the effects of fertilization programs and shading on P. nigra seedlings, aiming to accelerate early growth, and thus to reduce the nursery rearing time. The experiment (a completely randomized block design) was conducted in an open-air nursery by sowing seeds from Grevena, Northern Greece, in Quick pots filled with peat and perlite in a 2:1 ratio. The seedlings were subjected to two levels of fertilization—5 and 10 g L−1 NPK (30-10-10)—and two shading levels: 50% and 70%. At the ends of the first and second nursery growing season, we recorded the seedlings’ above- and below-ground morphology and biomass data. The results show that the application of all of the treatments produced seedlings which met the targeted quality standards for outplanting. However, the combination of a high fertilization rate and low shading level resulted in seedlings of a higher morphological quality, which is often considered to be an indicator for a successful seedling establishment in the field.

scholarly journals Identification and quantitative analysis of phenolic compounds naturally occuring in wood of selected European and exotic tree species

2009 ◽  
Vol 70 (1) ◽  
pp. 27-39 ◽  
Author(s):  
Paweł Zarzyński
Keyword(s):  
Quantitative Analysis ◽  
Phenolic Compounds ◽  
Tree Species ◽  
Exotic Tree

Identyfikacja i analiza ilościowa substancji o charakterze fenolowym naturalnie występujących w drewnie wybranych gatunków drzew europejskich i egzotycznych

scholarly journals Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 357
Author(s):  
Zhaohui Jia ◽  
Miaojing Meng ◽  
Chong Li ◽  
Bo Zhang ◽  
Lu Zhai ◽  
...  
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Ecological Restoration ◽  
Root Nodules ◽  
Robinia Pseudoacacia ◽  
Growth Index ◽  
Nodule Formation ◽  
Bare Rock ◽  
Mining Sites ◽  
Robinia Pseudoacacia L

Anthropogenic overexploitation poses significant threats to the ecosystems that surround mining sites, which also have tremendous negative impacts on human health and society safety. The technological capacity of the ecological restoration of mine sites is imminent, however, it remains a challenge to sustain the green restorative effects of ecological reconstruction. As a promising and environmentally friendly method, the use of microbial technologies to improve existing ecological restoration strategies have shown to be effective. Nonetheless, research into the mechanisms and influences of rock-solubilizing microbial inoculums on plant growth is negligible and the lack of this knowledge inhibits the broader application of this technology. We compared the effects of rock-solubilizing microbial inoculums on two plant species. The results revealed that rock-solubilizing microbial inoculums significantly increased the number of nodules and the total nodule volume of Robinia pseudoacacia L. but not of Lespedeza bicolor Turcz. The reason of the opposite reactions is possibly because the growth of R. pseudoacacia was significantly correlated with nodule formation, whereas L. bicolor’s growth index was more closely related to soil characteristics and if soil nitrogen content was sufficient to support its growth. Further, we found that soil sucrase activity contributed the most to the height of R. pseudoacacia, and the total volume of root nodules contributed most to its ground diameter and leaf area. Differently, we found a high contribution of total soil carbon to seedling height and ground diameter of L. bicolor, and the soil phosphatase activity contributed the most to the L. bicolor’ s leaf area. Our work suggests that the addition of rock-solubilizing microbial inoculums can enhance the supply capacity of soil nutrients and the ability of plants to take up nutrients for the promotion of plant growth. Altogether, our study provides technical support for the practical application of rock-solubilizing microbes on bare rock in the future.

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