Studies on Root System and Regrowth after Root Pruning in Tea Plants.

Abstract Cultural practices that modify root system structure in the plug of container-grown seedlings have the potential to improve root system function after planting. Our objective was to assess how copper root pruning affects the quality and root system development of longleaf pine seedlings grown in three cavity sizes in a greenhouse. Copper root pruning increased seedling size, the allocation of root system dry weight to the taproot, and the fraction of fibrous root mass allocated to secondary lateral roots compared with primary lateral roots. It decreased the allocation of root system dry weight to primary lateral roots and led to a distribution of root growth potential that more closely resembled the root growth of naturally sown seedlings. These effects of copper root pruning may benefit longleaf pine establishment. However, because copper root pruning increased competition for cavity growing space among the taproot and fibrous roots, we suggest that recommendations regarding cavity size and seedling quality parameters be tailored for copper-coated cavities.

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Root Pruning and Transplant Success for Cathedral Oak® Live Oaks

Journal of Environmental Horticulture ◽

10.24266/0738-2898-24.1.13 ◽

2006 ◽

Vol 24 (1) ◽

pp. 13-17 ◽

Cited By ~ 1

Author(s):

Edward F. Gilman ◽

Patti J. Anderson

Keyword(s):

Water Stress ◽

Root System ◽

Large Diameter ◽

Small Diameter ◽

Root Pruning ◽

Production Period ◽

Reduced Water ◽

Field Production

Abstract Trees that were root pruned regularly throughout the production period grew at a slower rate than trees that were not root pruned, but root pruning only in the last year of production did not affect trunk and canopy growth. Trees with root-pruning fabric installed under liners at planting grew at the same rate as trees without fabric during 39 months of field production. Hand spade root pruning throughout the production period increased the number of small diameter (< 3mm) roots and decreased the number of large diameter roots in the root ball compared to trees that were not root pruned. Root pruning only in the last year of production reduced the number of large diameter roots but did not increase the number of small diameter roots. Fabric had no impact on the root system. Root pruning with a hand spade throughout production or only in the last year of production reduced water stress significantly in trees following digging compared to trees not root pruned during production. Root-pruning fabric installed under liners at planting reduced stress following digging 39 months later, but only on two of the days when water stress was measured.

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РЕАБИЛИТАЦИЯ НЕУХОЖЕННЫХ ЧАЙНЫХ ПЛАНТАЦИЙ И РАЗРАБОТКА ПОСЛЕДУЮЩЕЙ АГРОТЕХНОЛОГИИ НА ПРИМЕРЕ РЕГИОНА ИМЕРЕТИ

INTERNATIONAL ACADEMY JOURNAL Web of Scholar ◽

10.31435/rsglobal_wos/31072019/6600 ◽

2019 ◽

pp. 7-12

Author(s):

Копалиани Р. Ш. ◽

Джинчарадзе Н. И. ◽

Капанадзе Ш. Ю.

Keyword(s):

Root System ◽

The State ◽

Morphological Features ◽

Extreme Conditions ◽

Recent Past ◽

Different Types ◽

Tea Plantations ◽

Long Time ◽

Massive Scale ◽

Tea Plants

Tea farming, in the recent past, was one of the leading branches of agriculture in Georgia. Since the 1990s of the last century this very important and leading branch of subtropical agriculture turned out to be bankrupt. On without well-groomed plantations, on a massive scale spread weeds, on the part of which, tea plants have undergone tough competition, it caused the weakness of tea culture function ability, in particular, in tea bushes were disturbed the function of physiological process, mainly the intensity of photosynthesis, increased breathing, etc. This article presents the results of a study of the state of tea plantations, who find themselves in extreme conditions unclean for a long time on the example of one of the tea producing regions of Georgia – Imereti, namely the degree of weed, morphological features of the aerial organs of tea plants, the root system, In this article it is discussed Some aspects of bushes caring process by applying different types of trimming and using the methods of mulching between rows. and also there is presented the development of practical measures for the rehabilitation of tea plantations.

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Container Production Strategies Influence Root Ball Morphology

Arboriculture & Urban Forestry ◽

10.48044/jauf.2014.002 ◽

2014 ◽

Vol 40 (1) ◽

Author(s):

Edward Gilman ◽

Maria Paz

Keyword(s):

Root System ◽

Retention Time ◽

Substrate Surface ◽

Root Pruning ◽

Production Strategies ◽

Porous Walls ◽

Swietenia Mahagoni ◽

Container Production

Poor anchorage and delayed establishment have been associated with root circling and ascending, descending, and kinked roots occurring in nursery containers. The main goal of this study was to find methods of producing from seed Swietenia mahagoni (L.) Jacq. with straight, non-deformed roots. In contrast to smooth-sided (SM) propagation containers (liners), roots grown in pots constructed of thin paper were straight with few deflections. Root pruning 12-month-old SM liners when shifting to 3.8 L containers dramatically reduced the imprint on the root system left by root deflections. Aggressive growth at the bottom of 3.8 L and 9.5 L smooth-sided containers appeared to inhibit growth in horizontal roots closer to the substrate surface, and resulted in a vertically oriented root system. In contrast, growing trees in 3.8 L and 9.5 L containers with exceptionally porous walls produced a more horizontal-oriented root system similar to well-anchored trees in the landscape. Vertical roots were discouraged from developing due to an elevated and porous bottom, forcing roots to grow more horizontally higher in the root ball profile. Root deflections increased with retention time in all containers.

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Morphological and physiological attributes of root systems and seedling growth in three different Picea glauca reforestation stock

Canadian Journal of Forest Research ◽

10.1139/x00-093 ◽

2000 ◽

Vol 30 (11) ◽

pp. 1669-1681 ◽

Cited By ~ 7

Author(s):

M J Krasowski ◽

J N Owens

Keyword(s):

Root System ◽

Seedling Growth ◽

Picea Glauca ◽

Root Systems ◽

Growing Season ◽

System Size ◽

The Other ◽

Root Pruning ◽

Growing Seasons ◽

Forest Sites

The relationship between certain morphological characteristics of white spruce (Picea glauca (Moench) Voss) planting stock (STK) and post-planting seedling performance was evaluated. Root system size at planting, its expansion, and its capacity to conduct water during the first post-planting weeks were determined. These characteristics were related to the performance of STK planted on two forest sites and measured for three growing seasons and to the performance of seedlings grown in large wooden boxes buried in the soil outdoors for one growing season (grown without competition from other vegetation). The compared STK were (i) polystyroblock grown, (ii) polystyroblock grown with chemical root pruning, and (iii) peat-board grown with mechanical root pruning. After three growing seasons on forest sites, seedlings with mechanically pruned roots grew more above ground than did seedlings from polystyroblock containers. This difference in seedling growth performance was even more significant for seedlings grown in wooden boxes. Of these, the mechanically pruned seedlings grew more not only above the ground but they also produced larger root systems by the end of the first growing season. This was despite the initially significantly smaller root systems of mechanically pruned seedlings, compared with the other two STK. Early (5-7 weeks after planting) post-planting root expansion patterns in the three STK were significantly different, with the roots of mechanically pruned seedlings growing less than the roots in the other two STK. In spite of this, pressure-probe measured hydraulic conductivity and water flux through root systems increased during the first post-planting weeks in mechanically pruned seedlings while declining or changing little in the other two STK. It was concluded that root system size at planting and its early post-planting expansion did not relate well to the root system hydraulic properties or to the post-planting seedling growth performance.

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

Forest Research Papers ◽

10.1515/frp-2016-0027 ◽

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.

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