8 research outputs found
The investigation of morphological characteristics of willow species in different environmental conditions
Alternative or renewable energy is a modern strategy with a good perspective
in the nearest future. There are several directions of renewable energy
development that depend on climatic, economic and technological opportunities
of a region. The perspective choice for areas with moderate climate is
bioenergy. One of the bioenergy directions is agro forestry based on short
rotation coppice plantations (SRC) of trees, like willow, poplar and others.
The goal of experiments was the assessment of the potential of different
willow species for the obtaining of energy in two climatic zones and on two
types of soils of Belarus. For this purpose several morphological
characteristics were metered: height of plants, biomass, diameter and number
of sprouts. The field experiments were conducted on two types of soils:
post-mining peaty soils in Grodno region and on degraded peaty soils in Brest
region of Belarus. The same soils are very problematic for growing of
traditional agricultural crops, thus willow production is a good alternative
for biomass production of energy as well as for the reclamation of these
soils. In our experiments the following species of willow were tested (Salix
alba, Salix viminalis, Salix dasyclados, Salix aurita) that may grow on peaty
soils at the natural conditions. The most popular species for modern
selection of SRC of willow is Salix viminalis. Nevertheless, the most
suitable morphological characteristics on post-mining peaty soils were
established for plants of Salix dasyclados and on degraded peaty soils for
the plants of Salix alba. The unfavorable parameters at the both type of
soils were identified for the plants of Salix aurita. However, it is
necessary to take into account that the used species are more popular for
natural wetlands and in our experiments plants have best results of survival
of cutting and rates of growth at the beginning of vegetation. In accordance
with these facts Salix aurita may not be used for energy plantation directly,
but it is interesting for hybridization with other species. Our results have
shown that perspective hybrids for peaty soils may be for instance Salix
aurita x Salix dasyclados and Salix aurita x Salix alba
Improvement of production of high-yield poplar varieties seedlings by mycorrhiza application
Research related to the effects of treatment by mycorrhiza preparations Ectovit, Rhodovit (preparations Symbio-m Ltd., Czech Rep.) and their combination on growth of four high-yield poplar clones of Populus deltoides and one variety of Populus x euramericana are presented in this paper. In order to make more accurate assessment of mycorrhiza effect, soil characteristics such as morphology, texture and chemical composition were determined. The study results indicate that mycorrhized cuttings had the same or the better survival in all the study clones compared to the control. The application of the preparation Ectovit and Rhodovit resulted averagely in the first class planting stock of all the study clones. The combination of the preparations Ectovit and Rhodovit produced averagely the first class planting stock only of the clone Populus x euramericana
Variability of anatomical-physiological traits in black locust clones - Robinia pseudoacacia L
Variability within R. pseudoacacia species represents an important factor in selection of fast-growing genotypes. Therefore, it is important to identify superior individuals according to their anatomical and physiological traits. This paper presents the results of a study of genotype variability of the main leaf anatomical (frequency, length and width of stomata, leaflet thickness among veins, leaflet thickness on the main vein, mesophyll thickness, length and width of vascular bundle of main vein) and physiological (leaf area, photosynthetic pigments content and content of N P, K, Ca, Na) parameters among five clones of Robinia pseudoacacia L. Significant interclonal variations were observed in the investigated parameters. Clone R-56 had the highest N, P, and K concentrations, the largest mesophyll volume and the highest pigment concentration. We concluded that the clone R-56, although without a remarkable leaf area, possesses the ability for high photosynthetic production. The results are going to be used in further work on selection
Establishment of Regional Phytoremediation Buffer Systems for Ecological Restoration in the Great Lakes Basin, USA. I. Genotype x Environment Interactions
Poplar remediation systems are ideal for reducing runoff, cleaning groundwater, and delivering ecosystem services to the North American Great Lakes and globally. We used phytorecurrent selection (PRS) to establish sixteen phytoremediation buffer systems (phyto buffers) (buffer groups: 2017 × 6; 2018 × 5; 2019 × 5) throughout the Lake Superior and Lake Michigan watersheds comprised of twelve PRS-selected clones each year. We tested for differences in genotypes, environments, and their interactions for health, height, diameter, and volume from ages one to four years. All trees had optimal health. Mean first-, second-, and third-year volume ranged from 71 ± 26 to 132 ± 39 cm3; 1440 ± 575 to 5765 ± 1132 cm3; and 8826 ± 2646 to 10,530 ± 2110 cm3, respectively. Fourth-year mean annual increment of 2017 buffer group trees ranged from 1.1 ± 0.7 to 7.8 ± 0.5 Mg ha−1 yr−1 . We identified generalist varieties with superior establishment across a broad range of buffers (‘DM114’, ‘NC14106’, ‘99038022’, ‘99059016’) and specialist clones uniquely adapted to local soil and climate conditions (‘7300502’, ‘DN5’, ‘DN34’, ‘DN177’, ‘NM2’, ‘NM5’, ‘NM6’). Using generalists and specialists enhances the potential for phytoremediation best management practices that are geographically robust, being regionally designed yet globally relevant
Photosynthetic response and tolerance of three willow species to cadmium exposure in hydroponic culture
Three willow species (Salix alba, Salix matsudana and Salix nigra) were
exposed to very high cadmium (Cd) concentrations in order to define some
physiological traits related to high biomass production. Plants were grown
hydroponically under semi-controlled conditions (greenhouse). It was assumed
that leaves accumulate different amounts of Cd in relation to their age due
to the specific occurrence of symptoms generated by Cd accumulation. The
rate of photosynthesis and concentration of photosynthetic pigments in young
and old leaves was correlated with biomass production in order to ascertain
their significance as indicators of plant performance at sites contaminated
with Cd. Changes in the photosynthetic parameters induced by treatments
depended on the concentration of Cd in the nutrient solution, the species of
willow and leaf age. Fv/Fm ratios were not considerably changed in treated
plants, indicating preserved activity of PSII. According to results
presented in this work, the Fv/Fm ratio was a less sensitive indicator of Cd
stress in willows than the rate of photosynthesis and pigment concentration.
High tolerance to applied treatments estimated on the basis of biomass
production of S. nigra and S. matsudana irrespective of Cd concentration in
the growth substrate might indicate their potential in the reclamation of
Cd-contaminated sites. [Projekat Ministarstva nauke Republike Srbije, br.
No. III 043007
Establishment of Regional Phytoremediation Buffer Systems for Ecological Restoration in the Great Lakes Basin, USA. II. New Clones Show Exceptional Promise
Poplar tree improvement strategies are needed to enhance ecosystem services’ provisioning and achieve phytoremediation objectives. We evaluated the establishment potential of new poplar clones developed at the University of Minnesota Duluth, Natural Resources Research Institute (NRRI) from sixteen phytoremediation buffer systems (phyto buffers) (buffer groups: 2017 × 6; 2018 × 5; 2019 × 5) throughout the Lake Superior and Lake Michigan watersheds. We divided clones into Experimental (testing stage genotypes) and Common (commercial and/or research genotypes) clone groups and compared them with each other and each NRRI clone (NRRI group) at the phyto buffers. We tested for differences in clone groups, phyto buffers, and their interactions for survival, health, height, diameter, and volume from ages one to four years. First-year survival was 97.1%, with 95.5%, 96.2%, and 99.6% for the 2017, 2018, and 2019 buffer groups, respectively. All trees had optimal health. Fourth-year mean annual increment of 2017 buffer group trees ranged from 2.66 ± 0.18 to 3.65 ± 0.17 Mg ha−1 yr−1 . NRRI clones ‘99038022’ and ‘9732-31’ exhibited exceptional survival and growth across eleven and ten phyto buffers, respectively, for all years. These approaches advance poplar tree improvement efforts throughout the region, continent, and world, with methods informing clonal selection for multiple end-uses, including phytotechnologies
Establishment of Regional Phytoremediation Buffer Systems for Ecological Restoration in the Great Lakes Basin, USA. II. New Clones Show Exceptional Promise
Poplar tree improvement strategies are needed to enhance ecosystem services’ provisioning and achieve phytoremediation objectives. We evaluated the establishment potential of new poplar clones developed at the University of Minnesota Duluth, Natural Resources Research Institute (NRRI) from sixteen phytoremediation buffer systems (phyto buffers) (buffer groups: 2017 × 6; 2018 × 5; 2019 × 5) throughout the Lake Superior and Lake Michigan watersheds. We divided clones into Experimental (testing stage genotypes) and Common (commercial and/or research genotypes) clone groups and compared them with each other and each NRRI clone (NRRI group) at the phyto buffers. We tested for differences in clone groups, phyto buffers, and their interactions for survival, health, height, diameter, and volume from ages one to four years. First-year survival was 97.1%, with 95.5%, 96.2%, and 99.6% for the 2017, 2018, and 2019 buffer groups, respectively. All trees had optimal health. Fourth-year mean annual increment of 2017 buffer group trees ranged from 2.66 ± 0.18 to 3.65 ± 0.17 Mg ha−1 yr−1. NRRI clones ‘99038022’ and ‘9732-31’ exhibited exceptional survival and growth across eleven and ten phyto buffers, respectively, for all years. These approaches advance poplar tree improvement efforts throughout the region, continent, and world, with methods informing clonal selection for multiple end-uses, including phytotechnologies
Establishment of Regional Phytoremediation Buffer Systems for Ecological Restoration in the Great Lakes Basin, USA. I. Genotype × Environment Interactions
Poplar remediation systems are ideal for reducing runoff, cleaning groundwater, and delivering ecosystem services to the North American Great Lakes and globally. We used phyto-recurrent selection (PRS) to establish sixteen phytoremediation buffer systems (phyto buffers) (buffer groups: 2017 × 6; 2018 × 5; 2019 × 5) throughout the Lake Superior and Lake Michigan watersheds comprised of twelve PRS-selected clones each year. We tested for differences in genotypes, environments, and their interactions for health, height, diameter, and volume from ages one to four years. All trees had optimal health. Mean first-, second-, and third-year volume ranged from 71 ± 26 to 132 ± 39 cm3; 1440 ± 575 to 5765 ± 1132 cm3; and 8826 ± 2646 to 10,530 ± 2110 cm3, respectively. Fourth-year mean annual increment of 2017 buffer group trees ranged from 1.1 ± 0.7 to 7.8 ± 0.5 Mg ha−1 yr−1. We identified generalist varieties with superior establishment across a broad range of buffers (‘DM114’, ‘NC14106’, ‘99038022’, ‘99059016’) and specialist clones uniquely adapted to local soil and climate conditions (‘7300502’, ‘DN5’, ‘DN34’, ‘DN177’, ‘NM2’, ‘NM5’, ‘NM6’). Using generalists and specialists enhances the potential for phytoremediation best management practices that are geographically robust, being regionally designed yet globally relevant