scholarly journals EFFECTS OF K-IBA AND RADICLE-CLIPPING TREATMENTS ON ROOT DEVELOPMENT OF NORTHERN RED OAK

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 607f-607
Author(s):  
Daniel G. Krueger ◽  
Bert T. Swanson
Keyword(s):  
Root Development ◽  
Quercus Rubra ◽  
Dry Weight ◽  
Root Systems ◽  
Red Oak ◽  
Northern Red Oak ◽  
Stem Height ◽  
Root Dry Weight ◽  
Low Concentrations ◽  
High Concentrations

To increase root fibrosity, acorns of northern red oak (Quercus rubra L.) were germinated and subjected to several radicle clipping (+/-) and K-IBA concentration treatments combintations prior to planting. Taproots and laterals ≥ 1 mm in diameter at the point of origin were counted. Low concentrations of K-IBA (0-4000 ppm) resulted in four root morphologies: 1) a single taproot and 3-6 laterals (no clipping/no K-IBA), 2) 4-5 taproots and 1-3 laterals (clipped only), 3) a single taproot and 5-12 laterals (not clipped/K-IBA) and 4) 6-12 taproots and 1-2 laterals. High concentrations of K-IBA (4000-10,000 ppm) `clipped' unclipped radicles resulting in root systems similiar to those clipped by hand. Stem height was unaffected by treatment. Radicle-clipping may increase stem caliper. K-IBA treatments may decrease root dry weight.

scholarly journals Effect of Propagation Tray Design on Early Stage Root Development of Acer rubrum, Quercus rubra, and Populus tremuloides 1

2017 ◽  
Vol 35 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Darby McGrath ◽  
Jason Henry ◽  
Ryan Munroe ◽  
Erin Agro
Keyword(s):  
Populus Tremuloides ◽  
Root Development ◽  
Root Architecture ◽  
Quercus Rubra ◽  
Early Stage ◽  
Acer Rubrum ◽  
Dry Weight ◽  
Red Oak ◽  
Quaking Aspen ◽  
Red Maple

Abstract This experiment investigated the effect of different plug-tray cell designs on root development of red maple (Acer rubrum), red oak (Quercus rubra), and quaking aspen (Populus tremuloides) seedlings. In April of 2015, seeds of each species were sown into three plug trays with different substrate volumes and grown for 17 weeks. Two trays had permeable walls for air-pruning, one with vertical ribs and one without. The third tray had impermeable plastic cell walls. Harvested seedlings were analyzed for root dry weight, length, volume, surface area and number of deflected roots. Root length per volume was highest in the impermeable-walled tray for red maple and quaking aspen. The total numbers of deflected root systems were higher for all species in the impermeable-walled tray. Seedlings grown in the air-pruning trays had smaller proportions of deflected root masses. Greater substrate volume did not influence root deflection development. The air-pruning tray without vertical ribs had the lowest total number of root masses with misdirected roots and lower proportions of root masses with misdirected roots for all species. These results indicate that improved root architecture in root-air pruning tray designs is achievable in tree propagation; however, vertical plastic structures in air-pruning trays can still cause root deflections. Index words: Deflected roots, air-pruning, seedling, propagation, plugs, root architecture. Species used in the study: red maple (Acer rubrum L.); red oak (Quercus rubra L.); quaking aspen (Populus tremuloides Michx.).

scholarly journals Subirrigation of Quercus rubra Seedlings: Nursery Stock Quality, Media Chemistry, and Early Field Performance

HortScience ◽  
2008 ◽  
Vol 43 (7) ◽  
pp. 2179-2185 ◽  
Author(s):  
Mindy L. Bumgarner ◽  
K. Francis Salifu ◽  
Douglass F. Jacobs
Keyword(s):  
Biomass Production ◽  
Aboveground Biomass ◽  
Quercus Rubra ◽  
Field Performance ◽  
Dry Weight ◽  
Nutrient Content ◽  
Forest Tree ◽  
Red Oak ◽  
Tree Seedlings ◽  
Northern Red Oak

Container seedling production systems for forest tree nurseries are challenged by the need for judicious water consumption. Subirrigation systems may provide an alternative to overhead systems by mitigating water use, yet remain relatively untested for propagation of forest tree seedlings. We evaluated effects of overhead versus subirrigation under varying media (40:60, 60:40, and 80:20 peat:perlite) and fertilization (0 or 1.2 g nitrogen/plant) regimes on nursery development and first-year field performance of northern red oak (Quercus rubra L.) seedlings. Fertilization increased aboveground biomass production and nutrient content, but decreased root dry weight. Relative to overhead-irrigated seedlings, subirrigation increased red oak seedling aboveground biomass production as well as above- and belowground nitrogen content under fertilized conditions. Media had no effect on plant response. Subirrigation increased electrical conductivity (5 dS·m−1 greater) and decreased pH in the upper media zone (0 to 5 cm from top), whereas the opposite effect was found in the lower zone. Nursery fertilization was associated with reduced field survival and growth, which may have been the result of transplant stress resulting from higher shoot:root. Subirrigated seedlings had greater field diameter growth. Our results suggest that subirrigation could serve as a viable alternative to overhead systems in container propagation of hardwood seedlings.

scholarly journals Growth and Ectomycorrhizal Development of Northern Red Oak Seedlings Treated with IBA

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 771-773 ◽  
Author(s):  
D.D. Crunkilton ◽  
H.E. Garrett ◽  
S.G. Pallardy
Keyword(s):  
Quercus Rubra ◽  
Dry Weight ◽  
Montmorillonite Clay ◽  
Red Oak ◽  
Northern Red Oak ◽  
Shoot Dry Weight ◽  
Positive Growth ◽  
Root Size ◽  
Size Container ◽  
Oak Seedlings

Ectomycorrhizal and nonmycorrhizal, glasshouse-grown northern red oak seedlings (Quercus rubra L.) received root treatments of IBA in starch, fired-montmorillonite clay, or starch-encapsulated montmorillonite clay. Clay proved to be superior to starch as a carrier for IBA, inducing significant increases in diameter, root length, leaf area, and shoot dry weight. Positive growth interactions between mycorrhizae and IBA were found with the clay carrier. The typical bare-rooted red oak seedling (grown for 1 year in nurseries and outplanted) performs poorly because of insufficient root size. Container-grown seedlings produced using clay/IBA treatments may perform better under field conditions than stock grown conventionally. Chemical name used: indole-3-butyric acid (IBA).

scholarly journals Spray deposition inside multiple-row nursery trees with a laser-guided sprayer1

2017 ◽  
Vol 35 (1) ◽  
pp. 13-23 ◽  
Author(s):  
H. Zhu ◽  
H. Liu ◽  
Y. Shen ◽  
Hengyu Liu ◽  
R. H. Zondag
Keyword(s):  
High Speed ◽  
Laser Scanning ◽  
Quercus Rubra ◽  
Spray Deposition ◽  
Field Tests ◽  
Red Oak ◽  
Northern Red Oak ◽  
Tree Structures ◽  
Speed Sensor ◽  
Tilia Tomentosa

Abstract Multiple-row container-grown trees require specially designed sprayers to achieve efficient spray delivery. A five-port air-assisted sprayer with both automatic and manual control modes was developed to discharge adequate spray deposition inside multiple-row trees. The sprayer resulted from integration of a high-speed laser-scanning sensor with a sophisticated nozzle flow control system, an embedded computer with a touch screen, a Doppler speed sensor, a specially-designed algorithm and an air-assisted sprayer base. It was able to detect target tree presence and measure target tree size, shape and leaf density. The sprayer then controlled the spray output of each nozzle to match tree structures. The sprayer was tested for its sprayer deposition quality inside canopies in a four-row sterling silver linden (Tilia tomentosa 'Sterling Silver' Moench) field and another six-row northern red oak (Quercus rubra L.) field. Tests were conducted with the sprayer in variable-rate application (VRA) and constant-rate application (CRA) modes. The average spray deposit on foliage of trees was 1.37±0.47 μL cm−2 from VRA and 1.29±0.42 μL cm−2 from CRA in linden, and was 2.15±0.57 μL cm−2 from VRA and 2.72±0.94 μL cm−2 from CRA in red oak, respectively. In comparison, spray coverage on foliage of trees was 19.8±3.0% from VRA and 20.9±4.3% from CRA in the linden trial, and was 27.9±3.7% from VRA and 30.5±5.4% from CRA, respectively, in the red oak trial. The newly developed air-assisted sprayer in both VRA and CRA modes would be able to discharge adequate spray deposition inside multiple-row tree plants while conserving pesticide. Index words: environmental protection, pest control, pesticide, precision sprayer, spray coverage. Species used in this study: sterling silver linden (Tilia tomentosa 'Sterling Silver' Moench), northern red oak (Quercus rubra L.).

Effects of atmospheric humidity and zonal soil water stress on initial growth of planted northern red oak seedlings

1980 ◽  
Vol 10 (4) ◽  
pp. 549-554 ◽  
Author(s):  
M. M. Larson
Keyword(s):  
Soil Moisture ◽  
Dry Weight ◽  
Moisture Stress ◽  
Red Oak ◽  
Initial Growth ◽  
Northern Red Oak ◽  
Soil Moisture Stress ◽  
Root Regeneration ◽  
Lower Root ◽  
Stress Levels

Northern red oak (Quercusrubra L.) 1-0 seedlings were planted in plastic tubes with a rubber moisture barrier placed around taproots at midpoint so that upper and lower sections of the root system could be independently watered with polyethylene glycol solutions to induce various soil moisture stress conditions. Trees were also grown at two relative humidity (RH) levels.In the first of two studies, soil moisture stress levels were −1/3, −3, −6 bars (1 bar = 105 Pa), and RH's were 75 and 45%. Root regeneration (largely confined to cut end of lower taproot) and top growth decreased, and dieback of planted stems increased, as soil moisture stress of either upper or lower root sections increased. When both sections were −6 bars, root regeneration was nil.In the second study, upper root soil moisture stress levels included a −12-bar treatment which reduced dry weight of leaves and roots to about one-half that of unstressed plants. However, a unit increase in stress to lower root sections was 1.5 to 4 times more inhibitory to growth than a similar stress to upper root sections. Low RH decreased several measures of seedling growth, increased stem dieback, and prolonged time to budbreak from 6 to 12 days for most soil moisture treatments.These studies demonstrate that root regeneration is very sensitive to soil moisture stress on lower roots, where most of the new roots originate, and moderately sensitive to stress on upper roots and to atmospheric stress on shoots.

scholarly journals Auger Planting of Oak Seedlings

2003 ◽  
Vol 20 (2) ◽  
pp. 92-93
Author(s):  
Eric Heitzman ◽  
Adrian Grell
Keyword(s):  
Quercus Rubra ◽  
Red Oak ◽  
Northern Red Oak ◽  
White Oak ◽  
Growing Seasons ◽  
Oak Seedlings

Abstract In 2001, we used power augers to plant 1-0 northern red oak (Quercus rubra) and white oak (Q. alba) seedlings in stony soils in Arkansas. After two growing seasons, red oak and white oak survival was 86% and 91%, respectively. Both species had only grown an average of 1 ft in height in 2 yr. North. J. Appl. For. 20(2):92–93.

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