scholarly journals Influence of nutrition and various substrates on spruce seedling growth

2004 ◽  
pp. 103-113 ◽  
Author(s):  
Matilda Djukic ◽  
Danijela Djunisijevic ◽  
Mihailo Grbic ◽  
Dragana Skocajic
Keyword(s):  
Picea Abies ◽  
Seedling Growth ◽  
Growth And Development ◽  
Root Mass ◽  
Needle Length ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Element Contents ◽  
One Year ◽  
Root Collar

The results of the influence of main macronutrients (N, P, and K) on growth and development of spruce (Picea abies L. Karst) one-year old seedlings are presented. They were grown in containers, in nursery conditions, on four different substrates. There is a good influence on biogenous element contents, height, root collar diameter, needle length and mass, root mass as well as physiological vitality of spruce seedlings. It was observed that the effect of nutrition depends also on the type of substrate.

scholarly journals Effect of sowing pattern and density on the quality of one-year-old Austrian pine bareroot seedlings

REFORESTA ◽  
2020 ◽  
pp. 25-30
Author(s):  
Jovana Devetaković ◽  
◽  
Lučian Krinulović ◽  
Ivona Kerkez Janković
Keyword(s):  
Morphological Characteristics ◽  
Dry Weight ◽  
Average Height ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Bareroot Seedlings ◽  
Forest Nurseries ◽  
One Year ◽  
Root Collar

Austrian pine (Pinus nigra Arnold) seedlings are frequently used for afforestation/reforestation and restoration practice in Serbia. Indeed, the seedlings of various stock types are produced by almost all forest nurseries in Serbia and bareroot seedlings are mostly common. The aim of this study is to analyze the method of sowing and sowing density on some morphological characteristics and quality of one-year-old Austrian pine seedlings. Sowing in rows and random sowing across all seedbed space were performed. In both cases, the sowing density (R1 - 8 g m-1, R2 - 40 g m-2) and half of the recommended sowing density (S1 - 4 g m-1, S2 - 20 g m-2) were applied. Seedlings from both treatments had average height and root collar diameter values in the range of 4.91 to 5.73 cm, and 1.25 to 2.34 mm, respectively. Observed characteristics of seedlings (height - H, root collar diameter - RCD, root length - RL, dry weight of shoot - SDW, root - RDW and seedlings - SLDW, sturdiness coefficient - SQ and quality index - QI) were conditioned by treatment (One-Way ANOVA, p<0.05). Shoot to root ration was similar at seedlings of all treatments and ranged from 1.33 to 1.63. In both cases, decreased density produced better results. The combination of lower sowing density (20 g m-2) and sowing in all seedbed areas (S2) provided the best seedlings with QI - 0.21.

scholarly journals Analysis of morphological quality parameters of oneyear old bare root sessile oak (Quercus petraea (Matt.) Liebl) seedlings

2019 ◽  
pp. 23-31
Author(s):  
Vladan Popović ◽  
Aleksandar Lučić ◽  
Ljubinko Rakonjac ◽  
Ivona Kerkez-Janković
Keyword(s):  
Quality Index ◽  
Quercus Petraea ◽  
Quality Parameters ◽  
Morphological Parameters ◽  
Root Collar Diameter ◽  
Sessile Oak ◽  
Collar Diameter ◽  
One Year ◽  
Root Collar

The paper analyzes the morphological quality parameters of one-year-old sessile oak (Quercus petraea (Matt.) Liebl) seedlings and their interrelations. Based on the performed analyzes, it was determined which of the measured morphological parameters, with minimal time and resources spent, gives the most accurate estimate of the quality of one-year old seedlings. For the conducted research, seedlings were produced in the nursery of the Institute of Forestry in Belgrade, in uniform environmental conditions from seed collected in seed stand RS-2-2-qpe-22-169. The seedlings were produced in the same nursery seedbed, and the sample for analysis was taken by dividing the seedbed into four sections and taking 30 seedlings from each section by random sampling. The following morphological parameters were measured: root collar diameter, height of seedlings, weight of above and underground part of seedling in absolutely dry condition and root volume. Based on the measured values, height ratios were calculated as follows: height:root collar diameter, weight of aboveground part of seedling: weight of underground part of seedling, and quality index. The height of the seedlings and root collar diameter are good indicators of quality, which is confirmed by the positive correlative relationships with other measured morphological parameters. A stronger dependence has been found in the root collar diameter, especially with the quality index, so it can be recommended as a good indicator of the quality of the one-year old sessile oak seedlings. The quality index has been confirmed as the most comprehensive morphological indicator of the seedling quality.

scholarly journals Seedling Growth of Tectona grandis using Different Potting Mixture

2021 ◽  
pp. 17-24
Author(s):  
G. E. Omokhua ◽  
C. Fredrick ◽  
C. N. Okakpu
Keyword(s):  
Seedling Growth ◽  
Growth Parameters ◽  
Tectona Grandis ◽  
Dry Weight ◽  
Leaf Number ◽  
Cow Dung ◽  
Root Collar Diameter ◽  
Shoot Dry Weight ◽  
Collar Diameter ◽  
Root Collar

Aims: This study evaluated the influence of 11 potting media compositions on seedling growth and development of Tectona grandis. Study Design: The experiment was set up in a completely randomized design involving ten replicates. Place and Duration of Study: The study was carried out at the Department of Forestry and Wildlife Management Nursery, University of Port Harcourt, Rivers State, Nigeria, between April 2019 and April 2020. Methodology: Ten (10) seedlings per sowing media including topsoil, topsoil and cow dung (2:1, 3:1), topsoil and poultry dung (2:1, 3:1), topsoil and pig dung (2.1, 3:1), topsoil and sawdust (2.1, 3:1), topsoil and mushroom substrate (2.1, 3:1) were selected and transplanted into polybags. Growth parameters (seedling height, root collar diameter, leaf number and biomass (shoot dry weight (SDW), root dry weight (RDW) and total dry weight (TDW)) were determined and subjected to analysis of variance. Results: Seedlings of T. grandis displayed significant differences (p ≤ 0.05) in height, root collar diameter, leaf number and biomass. Among treatments, tallest seedlings were observed in mixture of topsoil and poultry dung (3:1), at months 1 to 3 and in mixture of topsoil and cow dung (3:1) at months 4 and 5, highest root collar diameter was observed in mixture of topsoil and poultry dung (3:1) and highest leaf number was recorded in mixture of topsoil and poultry dung (2:1 and 3:1) and topsoil and cow dung (2:1 and 3:1) at months 1 to 5. The highest SDW was evident in mixture of topsoil and poultry dung (2:1) while highest RDW and TDW were observed in mixture of topsoil and cow dung (3:1). Lowest height, diameter, leaf number and biomass were recorded in topsoil (control) at months 1 to 5. Conclusion: The results revealed that among the tested mixtures, topsoil and poultry dung and topsoil and cow dung mixtures were the best for seedlings growth of T. grandis.

scholarly journals Mulch removal time did not have significant effects on Tuber melanosporum mycelium biomass

2021 ◽  
Vol 30 (1) ◽  
pp. eSC02
Author(s):  
İsmail Şen ◽  
Yasmine Piñuela ◽  
Josu G. Alday ◽  
Daniel Oliach ◽  
Francesc Bolaño ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Quercus Ilex ◽  
Quantitative Polymerase Chain Reaction ◽  
Tuber Melanosporum ◽  
Root Collar Diameter ◽  
Seedling Root ◽  
Removal Time ◽  
Collar Diameter ◽  
Root Collar ◽  
Mycelium Biomass

Aim of study: We aimed to i) evaluate the effects of mulching on Tuber melanosporum mycelium biomass and seedling growth (i.e. root collar diameter and seedling height) and ii) unravel the relationship between growth in root collar diameter and mycelium abundance, in a T. melanosporum plantation.Area of study: The experimental plantation is located in the Pre-Pyrenees mountains in Catalonia, Spain.Material and methods: The experimental plantation was established in 2010 using one-year-old T. melanosporum inoculated Quercus ilex seedlings. Double-layered mulch materials were placed around the seedlings. The mulch materials were removed from randomly selected seedlings in 2015 and 2018. Soil samples were collected in 2018 at 40 and 80 cm distances from seedlings that had mulching during five and eight years, and T. melanosporum mycelium biomass was estimated by quantitative Polymerase Chain Reaction (qPCR). Seedling root collar diameter and height were measured simultaneously when mulch materials were removed.Main results: Mulch removal time did not have significant effects on T. melanosporum mycelium biomass or seedling growth. However, mycelium biomass at 40 cm distance tended to be higher on seedlings after eight-year mulching with 0.9 mg/g soil whereas mycelium biomass was 0.4 mg/g soil after five-year mulching. A positive relationship between mycelium biomass and seedling root collar diameter was also found.Research highlights: Mulching seems to have a positive effect on truffle mycelium biomass, with nearly two times higher quantity of mycelium after eight-years compared with five-years mulching usage. Seedling root collar diameter is a good indicator of mycelium expansion in the plantation.Keywords: Black truffle; Quercus ilex; mulching; tree growth; truffle cultivation. 

scholarly journals The Effect of Seed Size on Germination and Seedling Growth in Sweet Chestnut (Castanea sativa Mill.)

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 858
Author(s):  
Katarina Tumpa ◽  
Antonio Vidaković ◽  
Damir Drvodelić ◽  
Mario Šango ◽  
Marilena Idžojtić ◽  
...  
Keyword(s):  
Seed Size ◽  
Seedling Growth ◽  
Germination Rate ◽  
Castanea Sativa ◽  
Seedling Height ◽  
Root Collar Diameter ◽  
Sweet Chestnut ◽  
Castanea Sativa Mill ◽  
Collar Diameter ◽  
Root Collar

The quantity and quality of seedlings in the nursery has an impact on the success of re-establishment and later growth. High germination rates enable a sufficient number of seedlings, and their quality is assessed using a number of parameters, including seedling height and root collar diameter. These parameters are influenced in some species by seed size, but the correlation between them is species-specific. The model species in this research was sweet chestnut (Castanea sativa Mill.), and seeds from 12 populations from two distinct biogeographical regions of Croatia were collected. We examined the influence of seed size on four parameters: germination rate, seedling height, root collar diameter and sturdiness quotient. Seed size has been shown to have a positive influence on both seedling height and root collar diameter, whereas no such correlation was noted for germination rate and sturdiness quotient. Significant differences in nut size and seedling growth parameters were found between the Mediterranean and continental populations, with higher values observed in the coastal Mediterranean populations. We concluded that seed origin and seed size have a significant impact on seedling growth and are important factors to consider when choosing seed material. Further nursery operations should consider seed origin and local environmental conditions when choosing seedlings for reforestation efforts and general forest operations.

scholarly journals Variability of some morphological traits of one-year old red oak, black walnut, birch and wild pear seedlings in the nurseries of Jastrebac region

2002 ◽  
pp. 147-160
Author(s):  
Milun Krstic ◽  
Nevena Vojinovic
Keyword(s):  
Comparative Analysis ◽  
Root Length ◽  
Black Walnut ◽  
Red Oak ◽  
Root Collar Diameter ◽  
Significant Difference ◽  
Collar Diameter ◽  
One Year ◽  
Root Collar ◽  
Oak Seedlings

Five morphological and quantitative characteristics of one-year old seedlings of Red oak (Quercus rubra L), Black walnut (Juglans nigra L), Wild pear (Pyrus pygrowser Borkh) and Birch (Betula verrucosa Ehrh) were studied. The seedlings were produced and cultivated in the controlled conditions of the nursery in the region of Jastrebac, by the classical method. Aboveground seedling height, root collar diameter, root length, number of secondary roots and the leaf assimilation area were analysed. Intraspecific and interspecific variability of morphological features of the above species were assessed by the comparative analysis and statistical methods The comparative analysis shows the great individual variability of seedlings, which can indicate their genetic potential, adaptation to environment conditions, further spontaneous selection and the development in natural conditions. This justifies the need of the quality assessment and the first selection already in the nursery, in order to ensure the quality planting material and to reduce the risk of afforestation failure One-year old birch seedlings have the lowest average height (18.8 cm). Black walnut and Wild pear seedlings are approximately twice as high, and Red oak about 2.5 times higher. At the same time Red oak seedlings have for about one-fourth greater height than Black walnut, and for one-third greater height than Wild pear. Wild pear seedlings attain the averagely twice larger root collar diameter than Birch (2.8 cm), Red oak seedlings about 2.5 times larger diameter, and Black walnut 3.5 times larger diameter. Black walnut has a larger root collar diameter than Red oak for about one third, and almost twice larger than Wild pear. Birch, Red oak and Wild pear have almost twice longer root (1.8-1.9 times), Black walnut about 2.25 times longer. The total assimilation area of a Birch seedling is averagely 89.0 cm2. Compared to birch, wild pear has approximately double assimilation area per tree, Red oak 10 times larger, Black walnut even 14 times larger assimilation area The analysis of variance shows that the experiment is homogeneous in general, i.e. that variance within the group of the same species per all characteristics is not statistically significant at the level p>0.01. The statistically significant difference was found in the attained heights of one-year old seedlings of Red oak and Birch, as well as between them and other species, while there is no difference between Black walnut and Wild pear. All analysed species differ significantly in root collar diameter of one-year old seedlings. Black walnut and Birch differ significantly in root length, and also compared to other species. There are no statistically significant differences in root length between Red oak and Wild pear. All the analysed species differ statistically significantly per total assimilation area of one seedling .

scholarly journals Growth of bare root Pinus taeda, L. seedlings cultivated under five densities in nursery

2007 ◽  
Vol 64 (1) ◽  
pp. 23-29
Author(s):  
José Geraldo de Araújo Carneiro ◽  
Deborah Guerra Barroso ◽  
Luis Maurício da Silva Soares
Keyword(s):  
Pinus Taeda ◽  
Dry Matter ◽  
Root Systems ◽  
Root Collar Diameter ◽  
Plant Densities ◽  
Collar Diameter ◽  
Bare Root ◽  
Pinus Taeda L ◽  
Root Collar ◽  
Dry Matter Weight

Seedlings compete for nutrients, water and light. The available area for each seedling affects their behavior related to requirements for these resources. This experiment evaluated the influence of five plant densities on the growth of bare root Pinus taeda, L. seedlings in a nursery after outplanting. The analyzed characteristics were: height (H), root collar diameter (D), H/D ratio, and dry matter weight. Higher densities stimulated H growth and the lowest densities increased D average and dry matter weight and lowered the H/D ratio. Seedlings were distributed by H, D and H/D classes. Higher densities had a larger number of seedlings in larger H classes. Larger numbers of seedlings with larger D and lower H/D ratios were found in lower densities. Ten months after outplanting the seedlings grown in lower densities had higher survival percentages and growth. Some saplings of standardized heights were uprooted with the objective of studying their root systems. The lowest densities stimulated higher numbers of first and second order roots as well as fresh and dry matter weights of thin roots with mycorrhizae presence. In both parts of the experiment, the density of 278 seedlings m-2 yielded equivalent averages as compared to the lowest densities.

scholarly journals Growth Regulators Affect the Growth and Biochemical Activity of Curcuma longa Plants Grown in vitro

2019 ◽  
Vol 11 (10) ◽  
pp. 277 ◽  
Author(s):  
Meire Pereira de Souza Ferrari ◽  
Mayara dos Santos Queiroz ◽  
Matheus Marquezini de Andrade ◽  
Jessica Rezende Trettel ◽  
Hélida Mara Magalhães
Keyword(s):  
Antioxidant Activity ◽  
Enzymatic Activity ◽  
Growth Regulators ◽  
Curcuma Longa ◽  
Ms Medium ◽  
Biochemical Activity ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Root Collar

This study aimed to evaluate the in vitro growth and biochemical activity of Curcuma longa explants using different MS medium formulations and growth regulators. In all the experiments, plants were grown in MS medium supplemented with agar (6.5 g L-1) and pH adjusted to 5.8. In the first assay, the MS culture medium at 70% strength, supplemented with 30 g L-1 of sucrose, and without the addition of activated carbon, resulted in the highest number of shoots. The sucrose concentration of 60 g L-1, combined with the addition of actived charcoalin half-strength MS medium, resulted in the increased root dry mass, root collar diameter, and relative chlorophyll index. In the second assay, the highest root collar diameter and dry matter of shoots and roots were found in the MS medium supplemented with 4.44 BAP, 0.46 KIN, and 1.08 NAA. The MS medium with 8.88 BAP, 0.92 KIN, and 2.16 &mu;M NAA resulted in the highest number of shoots (7.75), number of leaves (35), and shoot length (88.57 mm). The antioxidant activity was significantly higher in the treatments that resulted in better plantlets growth performance, demonstrating that the antioxidant activity is related to other factors such as a possible role of growth regulators on the elicitation of compounds in plants. Superoxide dismutase had a high enzymatic activity in both assays, whereas the enzymatic activity of catalase and ascorbate peroxidase was dependent on the culture media used.

scholarly journals Use of Time-of-Flight Ultrasound to Measure Wave Speed in Poplar Seedlings

Forests ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 682 ◽  
Author(s):  
Fenglu Liu ◽  
Pengfei Xu ◽  
Houjiang Zhang ◽  
Cheng Guan ◽  
Dan Feng ◽  
...  
Keyword(s):  
Ultrasonic Velocity ◽  
Wood Density ◽  
Microfibril Angle ◽  
Negative Relationship ◽  
Acoustic Resonance ◽  
Ultrasonic Speed ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Root Collar ◽  
Poplar Seedlings

In this study, 145 poplar (Populus × euramericana cv.’74/76’) seedlings, a common plantation tree species in China, were selected and their ultrasonic velocities were measured at four timepoints during the first growth year. After that, 60 poplar seedlings were randomly selected and cut down to determine their acoustic velocity, using the acoustic resonance method. The effects of influencing factors such as wood green density, microfibril angle, growth days, and root-collar diameter on acoustic speed in seedlings and the relationship between ultrasonic speed and acoustic resonance speed were investigated and analyzed in this work. The number of specimens used for investigating growth days and root-collar diameter was 145 in both cases, while 60 and two specimens were used for investigating wood density and the microfibril angle, respectively. The results of this study showed that the ultrasonic speed of poplar seedlings significantly and linearly increased with growth days, within 209 growing days. The ultrasonic velocity of poplar seedlings has a high and positive correlation with growth days, and the correlation was 0.99. However, no significant relationship was found between the ultrasonic velocity and root-collar diameter of poplar seedlings. Furthermore, a low and negative relationship was found between wood density and ultrasonic speed (R2 = 0.26). However, ultrasonic velocity significantly decreased with increasing microfibril angle (MFA) in two seedlings, and thus MFA may have an impact on ultrasonic speed in poplar seedlings. In addition, ultrasonic velocity was found to have a strong correlation with acoustic resonance velocity (R2 = 0.81) and a good correlation, R2 = 0.75, was also found between the dynamic moduli of elasticity from ultrasonic and acoustic resonance tests. The results of this study indicate that the ultrasonic technique can possibly be used to measure the ultrasound speed of young seedlings, and thus early screen seedlings for their stiffness properties in the future.

scholarly journals Influence of the Nutritional Aspects on Initial Growth of African Mahogany (Khaya ivorensis A. Chev.)

2018 ◽  
Vol 10 (6) ◽  
pp. 184
Author(s):  
Camila Oliveira Muniz ◽  
Eliana Paula Fernandes Brasil ◽  
Lucas Morais Lobo ◽  
Evaldo De Melo Ferreira ◽  
João Augusto da Silva ◽  
...  
Keyword(s):  
Plant Height ◽  
Base Saturation ◽  
Initial Growth ◽  
Root Collar Diameter ◽  
African Mahogany ◽  
Statistical Variation ◽  
Increasing Trend ◽  
Collar Diameter ◽  
Block Effect ◽  
Root Collar

Khaya ivorensis A. Chev. (African mahogany) is one of the most economically important forest species, since it is used in the international furniture market. However, little is known about its culture and nutritional requirements. This study aimed to assess the development of K. ivorensis plants subjected to different base saturations, as well as to different N, P and K levels. An 8-ha area was used, wherein 4 ha had base saturation increased to 55% and the remaining 4 ha to 75%. The experimental design adopted was randomized blocks with eight repetitions in a factorial scheme (4 × 4 × 4), being four N doses, four P doses and four K doses. The base saturation was assessed through the block effect. The root collar diameter and the plant height were measured 12 months after planting. Each experimental plot comprised six plants. The root collar diameter showed statistical differences between blocks and N doses. Only the NPK association showed statistical variation in plant height. However, a growth decreasing trend resulting from increased N doses was observed, as well as a growth increasing trend resulting from increased P and K doses. All treatments favored African mahogany growth. The most indicated base saturation was 55%, since there was no plant growth improvement when V% was increased to 75%. The excess of N impaired the growth of the species. The best treatment comprised 60 g urea, 240 g triple superphosphate, and 168 g potassium chloride.

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