scholarly journals MIXED AND MONOSPECIFIC STANDS OF EUCALYPTUS AND BLACK-WATTLE. II - FINE ROOT BIOMASS DENSITY

CERNE ◽  
2015 ◽  
Vol 21 (2) ◽  
pp. 209-217 ◽  
Author(s):  
Márcio Viera ◽  
Mauro Valdir Schumacher ◽  
Edenilson Vieira Liberalesso ◽  
Roque Rodríguez-Soalleiro
Keyword(s):  
Root Biomass ◽  
Fine Root ◽  
Block Design ◽  
Eucalyptus Grandis ◽  
Fine Root Biomass ◽  
Sampling Point ◽  
Acacia Mearnsii ◽  
Biomass Density ◽  
Randomized Block Design ◽  
Black Wattle

The aim of this study was to evaluate fine root biomass density (FRBD) in mixed and monospecific stands of Eucalyptus grandis x E. urophylla and Acacia mearnsii(black wattle) in Bagé-RS (Southern Brazil). An experimental trial was installed with three treatments: 100% Eucalyptus (100E); 100% Acacia mearnsii (100A); 50% Eucalyptus + 50% Acacia mearnsii (50E:50A). The trial was carried using a randomized block design with three replicates. The fine root (≤ 2.0mm) biomass density was determined 8 and 18 months after planting the trees. Soil samples were collected, with a cylindrical extractor auger (d = 7.0 cm), from four depths (0 - 5, 5 - 10, 10 - 20 and 20 - 30 cm) at each sampling point. After 8 months, the FRBD distribution was the same in both species and in all soil layers, reaching the maximum projection at 125 cm from the tree trunk. After 18 months, the root biomass density was higher in the monospecific black wattle stand than in the monospecific eucalyptus stand and the mixed stand. The fine root biomass density was highest in the 5 - 10 cm layer close to the trunk, for the planting row spacing, the planting line and the diagonals between two planting lines. Knowledge about fine root growth and distribution in soil at initial stages of stand development may help in decision-making for intensive forestry, thus ensuring more efficient use of soil resources.

scholarly journals USE OF MINI POLYTUNNELS FOR THE MAINTENANCE OF A CLONE GARDEN OF ACACIA MEARNSII DE WILDEMAN IN DIFFERENT SEASONS OF THE YEAR

FLORESTA ◽  
2018 ◽  
Vol 48 (4) ◽  
pp. 601
Author(s):  
Paulo César Flôres Junior ◽  
Mara Luana Engel ◽  
Angela Cristina Ikeda ◽  
Giovana Bomfim Alcantara ◽  
Antonio Rioyei Higa
Keyword(s):  
Block Design ◽  
Survival Rates ◽  
Summer Season ◽  
Shoot Length ◽  
Acacia Mearnsii ◽  
Randomized Block Design ◽  
Different Seasons ◽  
Black Wattle ◽  
Best Responses

The aim of this study was to verify the influence of mini polytunnels on the quality of shoots produced in a black wattle clone garden. The treatments used were: T1 – clone garden with mini polytunnels inside the greenhouse; T2 – clone garden with no mini polytunnels inside the greenhouse; T3 – clone garden with mini polytunnels outside the greenhouse; and T4 – clone garden with no mini polytunnels outside thegreenhouse. These four treatments formed a 4 x 3 factorial along with three seasons of the year: winter/2015, summer/2015-2016, and autumn/2016. A randomized block design was used with six blocks and ten cuttings per plot. Survival rate, number of shoots per cutting, and mean shoot length were evaluated. Shoots were collected from the cuttings and a rooting experiment with the same design was installed. Rooting rate, rate of shoots with calluses, number of roots per shoot, and mean shoot length per cutting were evaluated. There was interaction between the environment in the clone garden and the season of the year. In the winter, the treatment with mini polytunnels outside the greenhouse (T3) showed the best results, mainly in what concerns to the rooting of shoots. Shoots survived in the four clone garden environments, and the lowest survival rates were observed in the autumn/2016 season. The best responses were observed in the summer season.

Short-term effects of seasonal prescribed burning on the ectomycorrhizal fungal community and fine root biomass in ponderosa pine stands in the Blue Mountains of Oregon

2004 ◽  
Vol 34 (12) ◽  
pp. 2477-2491 ◽  
Author(s):  
J E Smith ◽  
D McKay ◽  
C G Niwa ◽  
W G Thies ◽  
G Brenner ◽  
...  
Keyword(s):  
Species Richness ◽  
Ponderosa Pine ◽  
Root Biomass ◽  
Prescribed Burning ◽  
Fine Root ◽  
Block Design ◽  
Fine Root Biomass ◽  
Soil Core ◽  
Blue Mountains ◽  
Large Tree

The effects of seasonal prescribed fire on the belowground ectomycorrhizal community and live fine root biomass were investigated before, 1 year after, and 2 years after prescribed underburning. Ectomycorrhizas were sampled from four replications of three treatments (fall underburning, spring underburning, and a nonburned control) in a randomized complete block design. Samples were separated in two subsamples representing the upper 5 cm and lower 5 cm of a soil core. Molecular tools were used to distinguish 140 restriction fragment length polymorphism (RFLP) species of fungi directly from the ectomycorrhizas. Prior to underburning, the number of RFLP species and amount of live root biomass were similar among treatment units and between upper and lower core samples. Fall underburning largely removed live root biomass to a depth of 10 cm and significantly reduced ectomycorrhizal species richness compared with spring underburning and the nonburned control for at least 2 years. RFLP species richness and live root biomass following spring underburning were generally similar to the nonburned treatment. The successful reintroduction of fire to the ecosystem to retain high species diversity of ectomycorrhizal fungi and achieve the desired future condition of large-tree ponderosa pine retention with low fuel loads may require more than underburning in a single season.

Effects of thinning on fine root biomass and carbon storage of subalpine Picea asperata plantation in Western Sichuan Province, China

2013 ◽  
Vol 36 (7) ◽  
pp. 645-654 ◽  
Author(s):  
Yun-Ke LIU ◽  
Chuan FAN ◽  
Xian-Wei LI ◽  
Yin-Hua LING ◽  
Yi-Gui ZHOU ◽  
...  
Keyword(s):  
Carbon Storage ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Sichuan Province ◽  
Western Sichuan ◽  
Picea Asperata

scholarly journals Fine root biomass and morphology in a temperate forest are influenced more by the nitrogen treatment approach than the rate

2021 ◽  
Vol 130 ◽  
pp. 108031
Author(s):  
Wen Li ◽  
Yifei Shi ◽  
Dandan Zhu ◽  
Wenqian Wang ◽  
Haowei Liu ◽  
...  
Keyword(s):  
Root Biomass ◽  
Temperate Forest ◽  
Fine Root ◽  
Treatment Approach ◽  
Fine Root Biomass ◽  
Nitrogen Treatment

scholarly journals Effect of earthworms on mycorrhization, root morphology and biomass of silver fir seedlings inoculated with black summer truffle (Tuber aestivum Vittad.)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tina Unuk Nahberger ◽  
Gian Maria Niccolò Benucci ◽  
Hojka Kraigher ◽  
Tine Grebenc
Keyword(s):  
Root System ◽  
Root Biomass ◽  
Fine Root ◽  
Abies Alba ◽  
Fine Root Biomass ◽  
Root Tip ◽  
Silver Fir ◽  
Tuber Aestivum ◽  
Root Tips ◽  
Root Parameters

AbstractSpecies of the genus Tuber have gained a lot of attention in recent decades due to their aromatic hypogenous fruitbodies, which can bring high prices on the market. The tendency in truffle production is to infect oak, hazel, beech, etc. in greenhouse conditions. We aimed to show whether silver fir (Abies alba Mill.) can be an appropriate host partner for commercial mycorrhization with truffles, and how earthworms in the inoculation substrate would affect the mycorrhization dynamics. Silver fir seedlings inoculated with Tuber. aestivum were analyzed for root system parameters and mycorrhization, how earthworms affect the bare root system, and if mycorrhization parameters change when earthworms are added to the inoculation substrate. Seedlings were analyzed 6 and 12 months after spore inoculation. Mycorrhization with or without earthworms revealed contrasting effects on fine root biomass and morphology of silver fir seedlings. Only a few of the assessed fine root parameters showed statistically significant response, namely higher fine root biomass and fine root tip density in inoculated seedlings without earthworms 6 months after inoculation, lower fine root tip density when earthworms were added, the specific root tip density increased in inoculated seedlings without earthworms 12 months after inoculation, and general negative effect of earthworm on branching density. Silver fir was confirmed as a suitable host partner for commercial mycorrhization with truffles, with 6% and 35% mycorrhization 6 months after inoculation and between 36% and 55% mycorrhization 12 months after inoculation. The effect of earthworms on mycorrhization of silver fir with Tuber aestivum was positive only after 6 months of mycorrhization, while this effect disappeared and turned insignificantly negative after 12 months due to the secondary effect of grazing on ectomycorrhizal root tips.

scholarly journals Biotic and Abiotic Determinants of Soil Organic Matter Stock and Fine Root Biomass in Mountain Area Temperate Forests—Examples from Cambisols under European Beech, Norway Spruce and Silver Fir (Carpathians, Central Europe)

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 823
Author(s):  
Anna Zielonka ◽  
Marek Drewnik ◽  
Łukasz Musielok ◽  
Marcin K. Dyderski ◽  
Dariusz Struzik ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Norway Spruce ◽  
Root Biomass ◽  
Fine Root ◽  
Stand Density ◽  
European Beech ◽  
Fine Root Biomass ◽  
Silver Fir ◽  
Beech Forests

Forest ecosystems significantly contribute to the global organic carbon (OC) pool, exhibiting high spatial heterogeneity in this respect. Some of the components of the OC pool in a forest (woody aboveground biomass (wAGB), coarse root biomass (CRB)) can be relatively easily estimated using readily available data from land observation and forest inventories, while some of the components of the OC pool are very difficult to determine (fine root biomass (FRB) and soil organic matter (SOM) stock). The main objectives of our study were to: (1) estimate the SOM stock; (2) estimate FRB; and (3) assess the relationship between both biotic (wAGB, forest age, foliage, stand density) and abiotic factors (climatic conditions, relief, soil properties) and SOM stocks and FRB in temperate forests in the Western Carpathians consisting of European beech, Norway spruce, and silver fir (32 forest inventory plots in total). We uncovered the highest wAGB in beech forests and highest SOM stocks under beech forest. FRB was the highest under fir forest. We noted a considerable impact of stand density on SOM stocks, particularly in beech and spruce forests. FRB content was mostly impacted by stand density only in beech forests without any discernible effects on other forest characteristics. We discovered significant impacts of relief-dependent factors and SOM stocks at all the studied sites. Our biomass and carbon models informed by more detailed environmental data led to reduce the uncertainty in over- and underestimation in Cambisols under beech, spruce, and fir forests for mountain temperate forest carbon pools.

Effects of harvesting on fine root biomass and decomposition in an Engelmann spruce – subalpine fir forest

2003 ◽  
Vol 33 (5) ◽  
pp. 847-853 ◽  
Author(s):  
Sylvia E Welke ◽  
Graeme D Hope ◽  
Gary A Hunt
Keyword(s):  
Root Biomass ◽  
Fine Root ◽  
Timber Harvesting ◽  
High Elevation ◽  
Fine Root Biomass ◽  
Nutrient Concentrations ◽  
Root Dynamics ◽  
Subalpine Fir ◽  
Root Longevity ◽  
Engelmann Spruce

The effect of timber harvesting on the biomass, nutrient standing crop, and decomposition of fine roots (<2 mm) was studied in a high elevation, Engelmann spruce (Picea engelmannii Parry ex Engelm.) – subalpine fir (Abies lasiocarpa (Hook.) Nutt.) forest. Root dynamics were compared in openings of different sizes. The sequential core method was used to collect fine root samples over 4 years. Differences in fine root biomass between opening sizes were most significant for the active fine root portion and were most pronounced in the fall compared with the spring. Active fine root biomass was significantly lower in the 10-ha clearcuts (164 kg/ha) compared with control plots (275 kg/ha). Furthermore, active fine root biomass was often lower in the 1.0-ha opening than in the 0.1-ha and control plots. A similar trend was established for inactive fine root biomass, although this was not consistent over sampling years. Nutrient concentrations of K, but no other elements, were higher in control plots. Nutrient standing crops, however, followed trends observed in fine root biomass. In the 10-ha clearcuts, the largest changes in fine root biomass occurred at the edge of the opening. The findings suggest that small (<10 ha) cutblocks may maintain greater fine root longevity.

scholarly journals Effects of elevated CO2 on fine root biomass are reduced by aridity but enhanced by soil nitrogen: A global assessment

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Juan Piñeiro ◽  
Raúl Ochoa-Hueso ◽  
Manuel Delgado-Baquerizo ◽  
Silvan Dobrick ◽  
Peter B. Reich ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Soil Nitrogen ◽  
Root Biomass ◽  
Global Assessment ◽  
Fine Root ◽  
Fine Root Biomass
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