Quantifying root system quality of nursery seedlings and relationship to outplanting performance

New Forests ◽  
2005 ◽  
Vol 30 (2-3) ◽  
pp. 295-311 ◽  
Author(s):  
Anthony S. Davis ◽  
Douglass F. Jacobs
Keyword(s):  
Root System ◽  
System Quality ◽  
Outplanting Performance

Growth and development of eastern white pine rooted cuttings compared with seedlings through 8 years of age

1990 ◽  
Vol 20 (3) ◽  
pp. 365-368 ◽  
Author(s):  
Daniel K. Struve ◽  
Steven E. McKeand
Keyword(s):  
Root System ◽  
Stem Cuttings ◽  
System Quality ◽  
White Pine ◽  
Eastern White Pine ◽  
Rooted Cuttings ◽  
The Difference ◽  
Stock Types ◽  
Bare Root

Container-grown rooted stem cuttings from 13 eastern white pine (Pinusstrobus L.) clones were paired with open-pollinated bare-root seedlings to compare growth through age 8 years of the two stock types. Before planting, measures of root system quality (number of roots per cutting, root distribution, and weighted root score) were recorded for each ramet to relate growth to initial root system quality. Rooted cuttings had higher survival than seedlings through year 8, 78 vs. 68%, respectively, but the difference was not statistically significant. Rooted cuttings were significantly shorter than seedlings after age 4 years, with differences between stock types increasing in magnitude through year 8. Measures of root system quality of rooted cuttings were not significantly correlated with survival or growth at any age.

scholarly journals Indole-3-butyric Acid Improves Root System Quality in Guarana Cuttings

HortScience ◽  
2020 ◽  
Vol 55 (10) ◽  
pp. 1670-1675
Author(s):  
Karla Gabrielle Dutra Pinto ◽  
Sônia Maria Figueiredo Albertino ◽  
Bruna Nogueira Leite ◽  
Daniel Oscar Pereira Soares ◽  
Francisco Martins de Castro ◽  
...  
Keyword(s):  
Root System ◽  
Butyric Acid ◽  
Qualitative Data ◽  
Agricultural Activity ◽  
Economic Potential ◽  
System Quality ◽  
Commercial Scale ◽  
Medicinal Properties ◽  
Small Producers

The economic potential of guarana relies on the energetic and medicinal properties of its seeds, which can be used to produce soft drinks, sticks, powder, and syrup. Brazil is the only guarana producer on a commercial scale, and the guarana crop system is the main agricultural activity in Maués, Amazonas. Although several types of technology have been developed to reduce costs and increase guarana productivity, the most important optimization of seedling production by cutting still needs to improve the rooting percentage and reduce mortality rates. However, the use of rooting inducers for guarana is still unestablished. Therefore, we evaluated the rooting potential of herbaceous cuttings from three guarana cultivars under different indole-3-butyric acid (IBA) concentrations. We recorded qualitative data from the roots of the cuttings. The IBA doses did not increase the percentage of rooted cuttings; however, they increased the root system quality of the guarana cuttings. We present this rooting method for the guarana plant as the most appropriate and least costly for small producers.

Root System Considerations in the Quality of Loblolly Pine Seedlings

1986 ◽  
Vol 10 (2) ◽  
pp. 87-92 ◽  
Author(s):  
W. C. Carlson
Keyword(s):  
Root Growth ◽  
Soil Temperature ◽  
Root System ◽  
Water Uptake ◽  
Loblolly Pine ◽  
Growth Potential ◽  
System Quality ◽  
Root Growth Potential ◽  
Root Volume

Abstract A series of studies was carried out to determine quantitative relationships between root system quality parameters and ability to take up water, and expand the root system into adjacent soil. Root system size, described by displacement of water (i.e., root volume), determines the potential for water uptake prior to new root growth. Seedlings of comparatively high root volume also have superior root growth potential (RGP). After new root growth, the potential for water uptake is proportional to the number of new roots produced. The beginning of rapid root growth after planting is dependent on soil temperature. Root growth potential rank of open-pollinated families can change with soil temperature, which also alters RGP within family. Nursery practices that favor production of seedlings with high root volume and high RGP will increase the quality of seedlings of a given height. South. J. Appl. For. 10:87-92, May 1986.

scholarly journals Enraizamento de estacas de mini-ixora (Ixora coccinea L. var. compacta) sob diferentes substratos e estimuladores de desenvolvimento radicular

ForScience ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. e00813
Author(s):  
Sheila Isabel do Carmo Pinto ◽  
Marcelo Dumont Moura
Keyword(s):  
Root System ◽  
Sugarcane Bagasse ◽  
Vegetative Propagation ◽  
Ornamental Plant ◽  
Lower Percentage ◽  
Morphological Parameters ◽  
Seedling Production ◽  
System Quality ◽  
Ixora Coccinea

A mini-ixora é uma planta ornamental propagada comercialmente por meio de estaquia e apreciada para uso em paisagismo. O enraizamento das estacas, no entanto, ocorre em baixa porcentagem, resultando em baixa produção de mudas nos viveiros. Visando otimizar a propagação vegetativa desta espécie, avaliou-se o efeito de diferentes estimuladores de desenvolvimento radicular e substratos sobre o enraizamento de estacas da mini-ixora. As estacas semi lenhosas com 10 cm de comprimento foram cultivadas em estufa climatizada. O delineamento experimental utilizado foi em blocos casualizados em esquema fatorial 2 x 6, sendo dois substratos (S1: 100% de areia lavada e S2: 50% de bagaço de cana + 50% de vermiculita) e seis estimuladores de enraizamento (água - testemunha; extrato de tiririca; hormônio comercial; AIB 1000 mg/L; AIB a 2000 mg/L e AIB a 4000 mg/L). Utilizaram-se quatro repetições e dez estacas por parcela experimental. Após 120 dias, foram avaliados os seguintes parâmetros morfológicos: estacas enraizadas (%), mortalidade (%), comprimento do sistema radicular, qualidade do sistema radicular e número de brotos por estaca. A propagação vegetativa das estacas de mini-ixora utilizando como substrato a mistura de bagaço de cana-de-açúcar com vermiculita proporciona maior porcentagem de enraizamento, comprimento radicular e menor porcentagem de mortalidade das estacas. O cultivo das estacas de mini-ixora no substrato composto de bagaço de cana-de-açúcar e vermiculita dispensa o uso de estimuladores de enraizamento para a obtenção de estacas com melhor qualidade do sistema radicular. Palavras-chave: Estaquia. AIB. Produção de mudas. Propagação vegetativa.   Rooting of mini-ixora cuttings (Ixora coccinea l. var. compacta) under different substrates and stimulators of radicular development Abstract Mini-ixora is an ornamental plant commercially propagated by cuttings. It is a species appreciated for use in gardens. The rooting of the cuttings, however, occurs in a low percentage, which results in low production of plants. In order to optimize the vegetative propagation of this species was studied the effect of different stimulators and substrates on rooting of mini-ixora cuttings. Cuttings with 10 cm were grown under controlled conditions. The experimental design was randomized blocks in a factorial scheme 2 x 6; two substrates (S1: 100% washed sand and S2: 50% sugarcane bagasse + 50% vermiculite) and six rooting stimulators (water; tiririca extract; commercial hormone; IBA 1000 mg/L; IAB 2000 mg/L and IBA 4000 mg/L). We used four replications and ten cuttings per experimental plot. After 120 days, we evaluated the following morphological parameters: percentage of rooted cuttings, percentage of mortality, length of the root system, root system quality and number of shoots per cutting. The vegetative propagation of the mini-ixora cuttings using as substrate a mixture of sugarcane bagasse with vermiculite provided the highest percentage of rooting, root length and lower percentage of mortality of the cuttings. The cultivation of mini-ixora cuttings on the substrate composed of sugarcane bagasse and vermiculite does not require the use of rooting stimulators to obtain cuttings with good quality of the root system. Keywords: Cuttings. IBA. Seedling production. Vegetative propagation.

scholarly journals Evaluating the success of the tele-pathology system in governmental hospitals in Kuwait: an explanatory sequential mixed methods design

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ali Jasem Buabbas ◽  
Tareq Mohammad ◽  
Adel K. Ayed ◽  
Hawraa Mallah ◽  
Hamza Al-Shawaf ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Mixed Methods ◽  
Support Services ◽  
User Satisfaction ◽  
Technical Support ◽  
Successful Implementation ◽  
System Quality ◽  
Mixed Methods Design ◽  
Telepathology System

Abstract Background Telepathology is the practice of reviewing and exchanging pathological images through telecommunication systems to obtain diagnoses remotely. Studying the factors that make such a system successful and favourable is important to ensure the merits of its implementation in clinical practice. Objective This study aims to evaluate the success of a telepathology system from the users’ perspectives, using specific evaluation criteria, namely: system quality, information quality, technical service quality, user satisfaction, and benefits. Methods A sequential explanatory mixed methods design was adopted in this study, which consists of two phases. Initially, a questionnaire was distributed via WhatsApp to all of the pathologists (total: 45) working at governmental hospitals in Kuwait. Followed by, semi-structured interviews with ten senior pathologists. Results Forty pathologists responded to the questionnaire, giving an 89% response rate. There were 42.5% of the respondents aged between 35–44 years old, and 52.5% were male. The quantitative results reveal that most of the respondents were satisfied with the quality of the telepathology system with a mean of 2.6025 (Standard Deviation (SD) = 0.47176), whereas they were dissatisfied with the quality of the information with a mean of 2.4100 (SD = 1.580) and the technical support services with a mean of 2.2750 (SD = 0.99535). In addition, there was disagreement on the benefits of telepathology in clinical practice among the pathologists with a mean of 2.4667 (SD = 0.77552). The qualitative results indicate that the lack of interest in and little experience with using the system were behind the general dissatisfaction of most of the respondents. All of the interviewees were satisfied with the performance of the telepathology system and considered it successful; however, the quality of the technical support services, including training workshops, was deemed deficient. Conclusion This study concluded that telepathology system in Kuwait is functioning well and has been successful in its implementation; however, pathologists are dissatisfied with it, mainly due to the deficient quality of the technical support services provided. In addition, the successful implementation of such advanced technologies requires careful steps to be taken on multiple levels: technical, organisational, and managerial. Recommendations were suggested.

scholarly journals System Quality of Human Physiological Signal Based Medical Auxiliary Diagnosis

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 27130-27139
Author(s):  
Zhiyuan Liu ◽  
Linghui Wu ◽  
Weina Fu
Keyword(s):  
System Quality ◽  
Physiological Signal

scholarly journals Quality in crisis: a systematic review of the quality of health systems in humanitarian settings

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Keely Jordan ◽  
Todd P. Lewis ◽  
Bayard Roberts
Keyword(s):  
Systematic Review ◽  
Health System ◽  
Health Systems ◽  
Point Of Care ◽  
System Level ◽  
System Quality ◽  
High Quality ◽  
Humanitarian Settings ◽  
Quality Health

Abstract Background There is a growing concern that the quality of health systems in humanitarian crises and the care they provide has received little attention. To help better understand current practice and research on health system quality, this paper aimed to examine the evidence on the quality of health systems in humanitarian settings. Methods This systematic review was based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol. The context of interest was populations affected by humanitarian crisis in low- and middle- income countries (LMICs). We included studies where the intervention of interest, health services for populations affected by crisis, was provided by the formal health system. Our outcome of interest was the quality of the health system. We included primary research studies, from a combination of information sources, published in English between January 2000 and January 2019 using quantitative and qualitative methods. We used the High Quality Health Systems Framework to analyze the included studies by quality domain and sub-domain. Results We identified 2285 articles through our search, of which 163 were eligible for full-text review, and 55 articles were eligible for inclusion in our systematic review. Poor diagnosis, inadequate patient referrals, and inappropriate treatment of illness were commonly cited barriers to quality care. There was a strong focus placed on the foundations of a health system with emphasis on the workforce and tools, but a limited focus on the health impacts of health systems. The review also suggests some barriers to high quality health systems that are specific to humanitarian settings such as language barriers for refugees in their host country, discontinued care for migrant populations with chronic conditions, and fears around provider safety. Conclusion The review highlights a large gap in the measurement of quality both at the point of care and at the health system level. There is a need for further work particularly on health system measurement strategies, accountability mechanisms, and patient-centered approaches in humanitarian settings.

Regional features of the anatomical structure of the root canals of the first molars

MedAlliance ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 96-101
Keyword(s):  
Root System ◽  
Anatomical Structure ◽  
System Structure ◽  
Cone Beam ◽  
Migration Activity ◽  
Root Canals ◽  
Regional Features ◽  
Root System Structure ◽  
Regions Of Russia

Unsatisfactory quality of root canal treatment is one of the most important problems of modern dentistry. One of the reasons is the limited knowledge of dentists about the regional features of the endodontic teeth anatomy, which is becoming particularly relevant in the rise of migration activity of the Russian population. But compared to other countries, there are very few studies and publications in this field in Russia. Objective. Study the features of first molars' root canals' anatomy in patients from different regions of Russia. Materials and methods. 363 cone-beam computed tomography (CBCT) scans of the jaws of patients 26 to 64 years of age, living in Moscow and StPetersburg for at least four generations have been considered. The endodontic anatomy of 347 first molars of the upper and 611 lower jaws was studied. The number of roots and root canals, their structure and shape were determined. Results. Anatomical differences in the structure of the first molars' root canals were established in residents who resided in Moscow and StPetersburg for several generations. Variations in the number of roots and root canals were found in the upper jaw molars. As for the canal-root system of the lower molars, most often they were characterised by different variants of the cross-section and the number of canals in the distal root. Conclusions. The results of the study can be used in practical dentistry, as they allow the dentists of StPetersburg and Moscow to expand the current understanding of the root system structure and the frequency of possible variations in these regions.

EXPERIENCE OF PLANTING LARGE SIZE CONIFEROUS WOODY SPECIES IN THE SPRING-SUMMER PERIOD ON THE KOLA NORTH

2021 ◽  
Vol 21 (3) ◽  
pp. 57-70
Author(s):  
E.A. Svyatkovskaya ◽  
◽  
N.V. Saltan ◽  
E.P. Rybalka ◽  
N.N. Trostenyuk ◽  
...  
Keyword(s):  
Root System ◽  
Picea Glauca ◽  
Polar Region ◽  
Woody Species ◽  
Larix Sibirica ◽  
Morphometric Parameters ◽  
Summer Period ◽  
Large Size ◽  
Urban Conditions

The first experience of transplanting large-sized coniferous dendrointroducents (Picea glauca (Moench) Voss, Larix sibirica Ledeb.) in the spring-summer period without preliminary prepara-tion of the root system in the urban conditions of the Polar region was presented. Four specimens of middle-aged plants of both species were selected. The transplant was carried out with the max-imum use of mechanized equipment, which ensures good preservation of the lump and the tree it-self. There were four mutually related stages of work (preparatory, digging out plants, transporta-tion, planting), the quality of which depends on the success of plant survival. A brief description of the decorative qualities, morphometric parameters and the state of the experimental plants has been given. It has shown that due to the peculiarities of the soil and the location of the root system in coniferous introduced species, a clod of earth should be at least 60 cm thick, with a diameter of 110 to 130 cm. The main agrotechnical methods for the creation and care of plantings from large-sized plants were given.

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