scholarly journals Effect of Seed Size ofAfzelia quanzensison Germination and Seedling Growth

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Kupatsa Mtambalika ◽  
Chimuleke Munthali ◽  
Dominic Gondwe ◽  
Edward Missanjo
Keyword(s):  
Seed Size ◽  
Germination Percentage ◽  
Seedling Height ◽  
High Quality ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Afzelia Quanzensis ◽  
Food Reserves ◽  
Root Collar

Afzelia quanzensisWelw is a valuable timber producing tree species in Africa. A study was conducted to evaluate the influence of seed size on seed germination and seedlings quality ofAfzelia quanzensis. Seed was categorized into three groups in regard to their length, small (<1.5 cm), medium (≥ 1.5 ≤ 2.5 cm), and large (>2.5 cm). The treatments were completely randomized into four replications. Germination percentage was not significantly(P>0.05)different between the treatments, although large seeds had the highest germination percentage of 94.9%. There were significant(P<0.05)differences in seedling height and root collar diameter among the different seed sizes, with large seeds having the highest seedlings height and largest root collar diameter. This was attributed to differences in the food reserves. Survival of transplants from shoot dieback was significantly(P<0.05)different such that seedlings from large seed attained the highest survival of 92%. It is therefore recommended that, for production of high quality transplants in the nursery, large seeds should be used.

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 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 Effects of root pruning and fertilization on biometric traits of 2-year-old seedlings of European beech (Fagus sylvatica L.)

2016 ◽  
Vol 77 (3) ◽  
pp. 256-260
Author(s):  
Winicjusz Kasprzyk ◽  
Szymon Jastrzębowski
Keyword(s):  
Root System ◽  
Fagus Sylvatica ◽  
Nitrogen Fertilization ◽  
European Beech ◽  
Root Pruning ◽  
Seedling Height ◽  
Root Collar Diameter ◽  
Fagus Sylvatica L ◽  
Collar Diameter ◽  
Root Collar

Abstract The aim of this study was to examine the effects of pruning the root system and different doses of nitrogen fertilization on the height and root collar diameter of 2-year-old beech seedlings (Fagus sylvatica L.). This research was conducted in the forest nursery Muchów (Jawor Forest District, regional directorate of State Forests in Wrocław) and two different pruning treatments (no pruning and at 12 cm depth) and nitrogen fertilization doses (25 and 50 kg×ha−1) were applied. Results from an ANOVA showed statistically significant differences between the two pruning treatments (p = 0.000) as well as for the interaction of both treatment factors (p = 0.019). Root collar diameter correlated with seedling height, both of which were significantly different for the two pruning treatments (p = 0.000). No statistically significant impact by the nitrogen fertilization doses on seedling height could be observed (p = 0.125). To conclude, we found that it is reasonable to reduce the doses of nitrogen fertilization to half the recommended amount, 25 kg×ha−1, if the root system is not pruned during the second growth year. Seedlings that do receive pruning should be fertilized using the recommended nitrogen doses.

scholarly journals Phytohormone effect on seedling quality in Hungarian oak

2019 ◽  
Vol 28 (2) ◽  
pp. e005 ◽  
Author(s):  
Cengiz Yücedağ ◽  
Nebi Bilir ◽  
Halil Barış Özel
Keyword(s):  
Indole Acetic Acid ◽  
Mechanical Resistance ◽  
Seedling Height ◽  
Indole Butyric Acid ◽  
Root Collar Diameter ◽  
Seedling Traits ◽  
Northwestern Region ◽  
Collar Diameter ◽  
Bare Root ◽  
Root Collar

Aim of study: to find out the effects of four phytohormones, including Indole Butyric Acid (IBA), Indole Acetic Acid (IAA), and Gibberellic acids (GA3, GA4) on seedling growth of Hungarian oak which has a natural distribution in the northwestern of Turkey.Area of Study: Mature acorns of Hungarian oak were collected from a natural stand in Zonguldak-Ereğli at northwestern region of Turkey.Material and Methods: Collected acorns of the species were pretreated with 300 ppm of each phytohormone for 24 hours and sown in Yenihan State Forest Nursery of Bartin, Turkey. Two years old bare-root seedlings were used for the measurements of seedling height, root collar diameter, stem, root and seedling fresh weights, and stem, root and seedling dry weights of two bare-root seedlings for each phytohormone treatment.Main results: Best performance of all studied seedling traits with the exception of root collar diameter was revealed in seedlings with IBA. In contrast, treatment of seeds with GA3 reduced all seedling traits apart from seedling height and root collar diameter. According to Dickson quality index, IBA was displayed to be the most beneficial phytohormone application for generating Hungarian oak seedlings with better mechanical resistance during transplanting.Research Highlights: IBA should be adopted in planting the seedlings of Hungarian oak for plantation activities.

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.

Morphological Effects of Root Pruning and Wrenching White Spruce Transplants

1988 ◽  
Vol 5 (4) ◽  
pp. 245-247
Author(s):  
Lisa J. Buse ◽  
Robert J. Day
Keyword(s):  
Growing Season ◽  
White Spruce ◽  
Shoot Elongation ◽  
Diameter Growth ◽  
Root Pruning ◽  
Fibrous Root ◽  
Root Collar Diameter ◽  
Collar Diameter ◽  
Root Collar

Abstract The principal objective of this research was to evaluate the effect of root pruning followed by wrenching on the morphological quality of 2 + 2 white spruce transplant stock during the final year on the nursery. In 1984, white spruce transplants were root pruned: (1) before shoot elongation; (2) during elongation; and (3) after elongation, followed by root wrenching at 28-day intervals until September (4, 3, and 2 times, respectively). In 1985, similar stock was root pruned before shoot elongation and (1) root wrenched at 21-day intervals (4 times), and (2) root wrenched periodically (twice). In both years, height and root collar diameter growth were monitored throughout the season. In the fall, morphological quality was assessed and bud samples were collected to determine the effects of root conditioning on primordia development. Root conditioning modified the morphology of stock in both years by reducing height and root collar diameter and inducing the development of a compact fibrous root system. Early season root pruning followed by wrenching at regular intervals throughout the growing season had the most effect on shoot and root morphology. Differences in results between years were attributed to environment. North. J. Appl. For. 5:245-247, December 1988.

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.

The effect of cupric carbonate on root morphology of containerized mycorrhizal pine seedlings

1985 ◽  
Vol 15 (3) ◽  
pp. 586-592 ◽  
Author(s):  
John L. Ruehle
Keyword(s):  
Root Morphology ◽  
Soil Surface ◽  
Seedling Height ◽  
Fresh Weight ◽  
Latex Paint ◽  
First Order ◽  
Rate Of Spread ◽  
Pine Seedlings ◽  
Collar Diameter ◽  
Root Collar

Loblolly (Pinustaeda L.), longleaf (Pinuspalustris Mill.), shortleaf (Pinusechinata Mill.), and eastern white (Pinusstrobus L.) pine seedlings inoculated with Pisolithustinctorius (Pers.) Coker & Couch (Pt) were raised in a greenhouse in containers painted with latex paint containing 50 g/L cupric carbonate (CuCO3). To determine the effects of CuCO3 on root development and morphology, seedlings were sampled in the middle and at the end of the test. The treatment was effective in preventing most first-order laterals of all species from growing down the container wall, yet it had no significant effect on seedling height, root-collar diameter, or top and root fresh weight. Cupric carbonate had little effect on ectomycorrhizal formation on loblolly and shortleaf seedlings, but significantly increased it on longleaf seedlings and decreased it on eastern white seedlings. Using CuCO3 to alter root morphology of containerized southern pine seedlings inoculated with Pt has the potential for developing stock that will grow long laterals near the soil surface for anchorage and increase the rate of spread of Pt ectomycorrhizae from the plug to new roots after planting.

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.

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