DO SEED MOTHER’S SITES AFFECT THE QUALITY OF THE SEEDLINGS PRODUCED

2020 ◽  
Vol 8 (10) ◽  
pp. 15-20
Author(s):  
Mohamed M. Younis ◽  
Younis Saeed Al Bugg ◽  
Siham Thannon Hussein
Keyword(s):  
Statistical Analysis ◽  
Morphological Characteristics ◽  
Dry Weight ◽  
Stem Length ◽  
Root Weight ◽  
The Third ◽  
Wet Weight ◽  
Total Dry Weight ◽  
The Relationship

This experiment was conducted in (Zawita) area in Dohuk governorate / Iraq, and the morphological characteristics were studied by selecting four sites, four trees from each site, four sectors and, choosing twenty trees in each sector. Statistical analysis (RCBD) was done using the SPSS system. Through this study, it was found that Pinus brutia Ten. In Zawita, there is a clear effect on some morphological characteristics of the seedlings resulting from it. The first site was one of the best sites followed by the second site where he gave seedlings of good quality in terms of stem length with an average of 39.25 cm and the total weight of wet and dry seedlings with averages of 13.97 and 35.34 g respectively, and the third site was the lowest studied sites and gave seedlings of less quality than the rest of the sites where he scored Stem length averaged 23.06 cm while wet and dry weight was 7.68 and 22.17 g, respectively. As for the correlation between the variables, the relationship was positive and strong among all the variables except those between the length of the root and the rest of the variables except with the characteristic of the wet root weight. The highest correlation values were between total dry weight and total wet weight recording 0.960 and the lowest between the length of the root and the dry vegetative weight where the value was 0.070.

scholarly journals EFEITOS DO MANEJO HÍDRICO E DA APLICAÇÃO DE POTÁSSIO NAS CARACTERÍSTICAS MORFOFISIOLÓGICAS DE MUDAS DE Eucalyptus Grandis W. (Hill ex. Maiden)

Irriga ◽  
2004 ◽  
Vol 9 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Magali Ribeiro da Silva ◽  
Antonio Evaldo Klar ◽  
José Raimundo Passos
Keyword(s):  
Water Management ◽  
Water Stress ◽  
Eucalyptus Grandis ◽  
Morphological Characteristics ◽  
Dry Weight ◽  
Root Weight ◽  
Shoot Height ◽  
Chlorophyll Contents ◽  
Total Dry Weight

EFEITOS DO MANEJO HÍDRICO E DA APLICAÇÃO DE POTÁSSIO NAS CARACTERÍSTICAS MORFOFISIOLÓGICAS DE MUDAS DE Eucalyptus Grandis W. (Hill ex. Maiden)   Magali Ribeiro da Silva1; Antonio Evaldo Klar2; José Raimundo Passos31Departamento de Recursos Naturais, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu, [email protected] de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu3Departamento de Bioestatística, Instituto de Biociências,  Universidade Estadual Paulista, Botucatu, SP   1 RESUMO  O trabalho teve por objetivo avaliar os efeitos do manejo hídrico e da adubação potássica realizados durante a fase de rustificação, na qualidade de mudas de Eucalyptus grandis. O experimento foi conduzido na Faculdade de Ciências Agronômicas da UNESP – Botucatu, e constituiu-se de um fatorial 2X4, sendo dois manejos hídricos (mudas irrigadas ao atingir as tensões de retenção de água pelo substrato de 0,01 MPa ou 1,5 MPa) e quatro doses de K (0, 75, 150 e 300 mg L-1). Foram feitas avaliações de: altura da parte aérea, diâmetro de colo, matéria seca da parte aérea e da radicular, matéria seca total, área foliar, relação altura da parte aérea / diâmetro de colo das mudas, teor de clorofila e taxa de transpiração. Os resultados morfológicos indicaram que somente a matéria seca radicular (MSR) diferiu estatisticamente em função do K aplicado. O estresse hídrico não teve efeito nas características morfológicas. Com relação às características fisiológicas, observou-se que os maiores teores de clorofila foram encontrados nas mudas submetidas ao maior estresse hídrico e maiores doses de K. As maiores taxas de transpiração foram observadas nas mudas dos tratamentos submetidos ao estresse hídrico mínimo. Não houve variação significativa entre as doses de K sobre a transpiração.  UNITERMOS: Eucalyptus, rustificação, qualidade de mudas, viveiro, fertilização.    SILVA, M. R. da; KLAR, A. E.; PASSOS, J. R. EFFECTS OF WATER MANAGEMENT AND POTASSIUM APPLICATION ON THE MORPHOPHYSIOLOGICAL CHARACTERISTICS OF SEEDLINGS OF Eucalyptus grandis  W. (Hill ex. Maiden)  2 ABSTRACTS  The objective of this study was to evaluate the effect of water management and potassium fertilizing applied during the hardening phase on the quality of Eucalyptus grandis seedlings. The experiment was conducted at the School of Agronomical Sciences of UNESP, Botucatu, and consisted of a factorial design 2X4; two water managements (seedlings irrigated when reaching water retention tensions by the substrate) and four doses of K (0, 75, 150 and 300 mg L-1). The following evaluations were made: shoot height, stalk diameter, shoot and root dry weight, total dry weight, leaf area, relation between seedling lap shoot height and diameter, transpiration rate and chlorophyll content. Morphological results showed that only the dry root weight differed statistically due to the K applied. The water management had no effect on the morphological characteristics. As to the physiological characteristics it was observed that the highest the chlorophyll contents were found in seedlings that had undergone the greatest water stress and K doses. The highest transpiration rates were observed in the seedlings of the treatments undergoing minimum water stress. The K levels did not influence transpiration statistically.  KEYWORDS: Eucalyptus, hardening, quality of seedlings, nursery, fertilization

Performance After Planting of Four Types of Container-grown Lodgepole Pine Seedlings

1973 ◽  
Vol 3 (2) ◽  
pp. 185-195 ◽  
Author(s):  
F. Endean ◽  
D. Hocking
Keyword(s):  
Lodgepole Pine ◽  
Dry Weight ◽  
Total Weight ◽  
Stem Length ◽  
Controlled Environment ◽  
Root Weight ◽  
Pine Seedlings ◽  
Total Dry Weight ◽  
Shoot Weight ◽  
Environment Experiment

Four types of container-grown lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) seedlings differing in age and rearing regime were transplanted into a controlled laboratory environment and into the field. After 12 weeks, seedlings were excavated and stem length and dry weight of shoot and roots were measured, these and derived parameters were compared with values obtained at the time of planting. Survival was uniformly high, the largest seedlings prior to planting performed best under all conditions. In the controlled environment experiment, initial shoot weight, total weight, and ratio of shoot weight/shoot length were significantly correlated with final root weight, an important factor in initial establishment; in addition shoot and total weight increment were significantly and positively correlated with initial shoot/root ratio. In the field no overall significant correlations were obtained. Shoot/root ratio decreased slightly in the controlled environment and significantly in the field after outplanting. Results suggest that the largest plant which can be grown and planted economically shows largest increment and achieves largest final total dry weight and root dry weight in the first growing season after outplanting. The need for a physiological rather than morphological grading of seedlings is stressed.

scholarly journals Nitrogen-Yield Relationships in Greenhouse Roses

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 789C-789 ◽  
Author(s):  
Raul I. Cabrera ◽  
Richard Y. Evans
Keyword(s):  
Dry Weight ◽  
Stem Length ◽  
N Application ◽  
Yield And Quality ◽  
Flower Yield ◽  
Yield Parameters ◽  
N Concentration ◽  
Leaf N Concentration ◽  
Total Dry Weight ◽  
The Relationship

The establishment of critical tissue N (Ncrit) for greenhouse rose production has been primarily based on visual symptoms of N deficiency, with relatively less consideration to yield parameters. This work examined the relationship between rose leaf N concentration and flower yield and quality. Microlysimeter-grown `Royalty' rose plants were irrigated with complete nutrient solutions containing N concentrations of 30, 60, 90, 120, 150, and 220 mg·liter–1. Results after 1 year indicated no significant differences in total dry weight, number of flowers, and stem length for plants irrigated with 90 to 220 mg·liter–1 N. Tissue N concentrations were significantly lower for plants that received 30 or 60 mg N/liter. Estimated Ncrit for yield parameters were ≈2.7% of leaf dry weight. Chlorophyll content and color leaf attributes (hue, chroma, and value) were correlated with tissue N concentration. The results suggest that the rate of N application typically recommended for greenhouse roses is considerably higher than necessary.

BIOASSAY OF PROLACTIN

1969 ◽  
Vol 60 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Charles S. Nicoll
Keyword(s):  
Epithelial Cells ◽  
Lipid Content ◽  
Dry Weight ◽  
Fat Content ◽  
Assay Sensitivity ◽  
Mucosal Epithelium ◽  
Wet Weight ◽  
Total Dry Weight

ABSTRACT The response of the pigeon crop-sac to systemically acting prolactin (injected subcutaneously) was evaluated by measuring the wet weight of the responsive lateral lobes of the organ and by determining the dry weight of a 4 cm diameter disc of mucosal epithelium taken from one hemicrop. Of several different injection schedules tested, administration of prolactin in four daily injections was found to yield optimal responses. When compared with a graded series of prolactin doses, measurement of the mucosal dry weight proved to be a better method of response quantification than determination of the crop-sac wet weight with respect to both assay sensitivity and precision. The submucosal tissue of the crop-sac was estimated to constitute about 64 % of the total dry weight of the unstimulated organ and it was found to be relatively unresponsive to prolactin stimulation in comparison with the mucosa. The lipid content of the mucosal epithelium was determined using unstimulated crop-sacs or tissues which showed varying degrees of prolactin-induced proliferation. The fat content of the mucosal epithelial cells increased only slightly more rapidly than the dry weight or the defatted dry weight of the mucosa. Suggestions are made for the further improvement of the systemic crop-sac assay for prolactin.

scholarly journals Analyzing the Effects of the Kinematic System on the Quality of Holes Drilled in 42CrMo4 + QT Steel

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4046
Author(s):  
Mateusz Bronis ◽  
Edward Miko ◽  
Lukasz Nowakowski
Keyword(s):  
Cutting Speed ◽  
Hole Drilling ◽  
Internal Cooling ◽  
Hole Quality ◽  
The Third ◽  
Kinematic System ◽  
Turning Center ◽  
Dimensional Errors ◽  
The Relationship

This article discusses the relationship between the kinematic system used in drilling and the quality of through-holes. The drilling was done on a CTX Alpha 500 universal turning center using a TiAlN-coated 6.0 mm drill bit with internal cooling, mounted in a driven tool holder. The holes were cut in cylindrical 42CrMo4 + QT steel samples measuring 30 mm in diameter and 30 mm in length. Three types of hole-drilling kinematic systems were considered. The first consisted of a fixed workpiece and a tool performing rotary (primary) and linear motions. In the second system, the workpiece rotated (primary motion) while the tool moved linearly. In the third system, the workpiece and the tool rotated in opposite directions; the tool also moved linearly. The analysis was carried out for four output parameters characterizing the hole quality (i.e., cylindricity, straightness, roundness, and diameter errors). The experiment was designed using the Taguchi approach (orthogonal array). ANOVA multi-factor statistical analysis was used to determine the influence of the input parameters (cutting speed, feed per revolution and type of kinematic system) on the geometrical and dimensional errors of the hole. From the analysis, it is evident that the kinematic system had a significant effect on the hole roundness error.

scholarly journals Statistical analysis of factors affecting the service quality of Jetstar Pacific Airlines

2015 ◽  
Vol 18 (2) ◽  
pp. 67-75
Author(s):  
Nhan Huu Huynh ◽  
Dung Anh To
Keyword(s):  
Factor Analysis ◽  
Statistical Analysis ◽  
Service Quality ◽  
External Environment ◽  
Technical Quality ◽  
Quality Model ◽  
Factors Affecting ◽  
Functional Quality ◽  
The Relationship

The aim of this paper is to study the effects of service quality in Jetstar Pacific Airlines towards customer’s satisfaction under the perspective of Servqual and Gronroos service quality model and the relationship between functional quality, technical quality, internal and external environment influences mediated by Jetstar Pacific Airlines images and service quality using the main statistical methods such as factor analysis and multiple linear regression.

Saflufenacil Carryover Injury Varies among Rotational Crops

2012 ◽  
Vol 26 (2) ◽  
pp. 177-182 ◽  
Author(s):  
Darren E. Robinson ◽  
Kristen E. McNaughton
Keyword(s):  
Sugar Beet ◽  
Growth Yield ◽  
Dry Weight ◽  
Sugar Beet Plant ◽  
Root Weight ◽  
Carrot Root ◽  
Field Corn ◽  
Yield And Quality ◽  
Weight Yield

Trials were established in 2007, 2008, and 2009 in Ontario, Canada, to determine the effect of soil residues of saflufenacil on growth, yield, and quality of eight rotational crops planted 1 yr after application. In the year of establishment, saflufenacil was applied PRE to field corn at rates of 75, 100, and 200 g ai ha−1. Cabbage, carrot, cucumber, onion, pea, pepper, potato, and sugar beet were planted 1 yr later, maintained weed-free, and plant dry weight, yield, and quality measures of interest to processors for each crop were determined. Reductions in dry weight and yield of all grades of cucumber were determined at both the 100 and 200 g ha−1rates of saflufenacil. Plant dry weight, bulb number, and size and yield of onion were also reduced by saflufenacil at 100 and 200 g ha−1. Sugar beet plant dry weight and yield, but not sucrose content, were decreased by saflufenacil at 100 and 200 g ha−1. Cabbage plant dry weight, head size, and yield; carrot root weight and yield; and pepper dry weight, fruit number and size, and yield were only reduced in those treatments in which twice the field corn rate had been applied to simulate the effect of spray overlap in the previous year. Pea and potato were not negatively impacted by applications of saflufenacil in the year prior to planting. It is recommended that cabbage, carrot, cucumber, onion, pepper, and sugar beet not be planted the year after saflufenacil application at rates up to 200 g ha−1. Pea and potato can be safely planted the year following application of saflufenacil up to rates of 200 g ha−1.

scholarly journals THE EFFECT OF FESTIVAL QUALITY ON REVISIT INTENTION: MEDIATING ROLE OF DESTINATION IMAGE IN JEMBER FASHION CARNAVAL, JEMBER, INDONESIA

2021 ◽  
Vol 38 (4) ◽  
pp. 1195-1202
Author(s):  
SUPRIONO SUPRIONO ◽  
◽  
Edy YULIANTO ◽  
Keyword(s):  
Statistical Analysis ◽  
Quantitative Approach ◽  
Destination Image ◽  
Mediating Role ◽  
Revisit Intention ◽  
Program Content ◽  
The Relationship

This study aims to investigate and explain festival qualities that are applied to festival organizers that affect the destination image and the tourist revisit intention. This research uses a quantitative approach through statistical analysis of PLS-SEM and distributed questionnaires that have been designed to 200 tourists. The findings of this study indicate that the constructs of the variables that shape the quality of the festival, namely program content, convenience, and staff, have a positive and significant effect on the image of the destination. In addition, the relationship between destination image and revisit intention has a positive and significant effect.

Problems of Growth of the African Migratory Locust

1938 ◽  
Vol 29 (4) ◽  
pp. 425-456 ◽  
Author(s):  
A. J. Duarte
Keyword(s):  
Dry Weight ◽  
Hind Femur ◽  
The Other ◽  
The Third ◽  
Cell Divisions ◽  
First Instar ◽  
Wet Weight ◽  
Solitary Males ◽  
Rates Of Growth ◽  
Control Batch

General Growth.Generally, females have higher rates of growth than males. The phases, however, do not show appreciable differences in the rate. The pronotum has for increase in length the highest values which decrease throughout the instars (whereas the constants for the other parts remain fairly stable up to the fifth instar).Dyar's rule was applied for the growth in length of the middle femur and the width of the head, and it was found that the rule holds good for these parts.Przibram's rule, as modified by Bodenheimer, holds true for the growth in length of the different parts and shows the occurrence of latent cell-divisions varying from one (width of head and of pronotum) to four (length of pronotum). The number of latent cell-divisions keeps fairly constant in both phases.For wet weight Przibram's principle is inapplicable, owing to the large percentage of differences between the actual and calculated values.Gregarious males are heavier than solitary males up to the third stadium ; gregarious females are heavier than solitary females up to the third stadium ; fourth, fifth and adult stadia being characterized by higher values in wet weight for solitary females than for gregarious females. Females have higher rates of increase in wet weight than males. No significant differences exist in the rates of increase between gregarious and solitary individuals. In the fifth-adult stadium all the rates decrease except in gregarious females, which show a rise.Gregarious insects have higher values in dry weight than solitary insects, except solitary females in the adult stadium. The coefficients are higher for females than for males.The rates of increase reach the highest values in the second-third stadium of gregarious insects and solitary females, whereas solitary males have their highest value in the fourth-fifth stadium.With the exception of solitary females, all the rates of growth in dry weight decline in the fifth-adult stadium.The rates of growth of the hind legs obtained from the cube-roots of their wet weights are compared with the rates of linear growth of the hind femora. Their variation throughout the instars seems to be in opposite directions. Therefore it is suggested that the rates of growth in wet weight of the hind legs and the rates of growth in length of the respective hind femora are independent of each other.Growth of the parts.The application of the exponential allometry formula y=bxα to the data on dimensions of the parts of Locusta shows the existence of negative, positive and almost isometric growth.The pronotum has the highest value for the growth in length relatively to the growth in length of the middle femur ; the lowest value pertains to the growth in width of the head.Males have higher values than females ; phase gregaria exhibits higher growth-ratios than phase solitaria.With the exception of the hind femur the growth-ratios decline throughout the instars. The greatest decline pertains to the growth in length of the pronotum.A growth-gradient exists in Locusta with the highest value in the pronotum. The middle femur divides the growth-gradient into two parts : an anterior part with values decreasing with the growth of the insect, and a posterior part whose values increase with its growth.Effects of the amputation of the hind tibiae on crowded locusts.The effects obtained by mutilating both hind tibiae of three hundred first instar hoppers of Locusta migratoria migratorioides and placing them in a crowded condition are compared with the effects obtained by crowding a batch of the same number of first instar unoperated insects.The insects with their hind tibiae cut off did not develop as far as those of the control batch ; the differences in dimensions are greater for the hind femur than for the other parts of the body.In the experimental batch the hind femur, as a consequence of its useless condition, became extremely short as compared with the elytra, bringing the ratio E/F to a high value (over 1·950), thus leading to a false interpretation.The occurrence of the black-orange coloration in both batches suggested that both developed towards phase gregaria. This coloration was stronger and more uniform in the control batch than it was in the experimental batch. Thus the control animals developed into a better gregarious type.

Effect of Shade on Giant Foxtail

Weed Science ◽  
1972 ◽  
Vol 20 (6) ◽  
pp. 588-592 ◽  
Author(s):  
Ellery L. Knake
Keyword(s):  
Dry Matter ◽  
Morphological Characteristics ◽  
Dry Weight ◽  
Field Studies ◽  
Giant Foxtail ◽  
Setaria Faberii ◽  
Number Of Leaves ◽  
Number Of Stems ◽  
Total Dry Weight ◽  
Number Of Seeds

Field studies were conducted with giant foxtail(Setaria faberiiHerrm.) under shade intensities of 0, 30, 60, 70, 80, and 98%. Seed weight, dry weight of plant tops exclusive of seed, and total dry weight per plant decreased linearly with increasing shade intensities. These decreases were due primarily to decreases in number of leaves, number of stems per plant, and number of heads per plant. Height of main culm was less affected than other morphological characteristics. Shading affected the length of internodes but had little influence on number of internodes on the main culm. The amount of shade required to control giant foxtail completely, once it is established, appears to be above 95%. Expressed as 2-year means, plants grew to as much as 135 cm, had as many as 188 leaves, 41 stems, and 31 heads, and produced 73 g of dry matter per plant including 6 g of seed. Maximum number of seeds per head was 1405.

Sign in / Sign up

Export Citation Format

Share Document