scholarly journals Effet des Doses de Semis et de la Méthode De Conduite de La Pépinière sur les Caractéristiques Morphologiques des Plantules de Cinq Variétés D’oignon (Allium cepa L.) en Côte d’Ivoire

2021 ◽  
Vol 17 (34) ◽  
pp. 208
Author(s):  
Koffi Eric-Blanchard Zadjéhi ◽  
Diarrassouba Nafan ◽  
Yao Saraka Didier Martial ◽  
Sie Raoul Sylvère
Keyword(s):  
Dry Matter ◽  
Statistical Data ◽  
Morphological Characteristics ◽  
Morphological Data ◽  
Seeding Rate ◽  
Experimental Site ◽  
Allium Cepa L ◽  
Nursery Management ◽  
Number Of Leaves ◽  
Selection Of

Le manque de méthodes standardisées pour la pépinière d’oignon a suscité la présente étude. Elle a pour objectif d’évaluer deux pratiques culturales de pépinière d’oignon à travers les caractéristiques végétatives des plantules. À cet effet cinq variétés (Bati, Damani, Cara, Karibou et Safari) et deux milieux de conduite de pépinière : terre et alvéole ont été mis en comparaison sur le site expérimental de l’Université Peleforo GON COULIBALY de Korhogo de janvier à février 2020. Sur terre, trois doses de semis (3, 4 et 5 g/m2) et dans les alvéoles trois graines par poquet ont été expérimentées. Les données morphologiques ont été collectées 40 jours après semis. Le logiciel SPSS 22.0 a été utilisé pour le traitement statistique des données collectées. Une analyse de variance incorporant la comparaison des moyennes selon Newman et Keuls au seuil de 5% a été réalisée pour comparer les caractéristiques morphologiques des différentes variétés entre elles. Il ressort de cette étude que les plantules élevées dans les alvéoles ont eu en moyenne les tailles les plus élevées (17,32 cm). Sur terre, les tailles ont varié de 14,77 cm (dose de 05 g/m2) à 16,09 cm (dose 03 et 04 g/m2). Les doses de semis 03 et 04 g/m2 ont enregistré les plantules les plus robustes relativement au nombre de feuilles (03), les poids frais (0,35 g) et sec (0,035 g) et le taux de matière sèche (10%). Les variétés Damani, Karibou et Safari ont eu les meilleures performances relativement aux caractéristiques morphologiques. La robustesse de la plantule est corrélée positivement à sa taille et au nombre de feuilles. Au vu des résultats, la pépinière d’oignon peut être conduite dans les alvéoles ou sur terre à la dose 04 g/m2. La sélection des plantules en pépinière peut se faire en se basant uniquement sur la taille de la plantule et le nombre de feuilles. The lack of standardized methods for the onion nursery prompted this study. Its objective was to evaluate two cultivation practices of the onion nursery through the vegetative characteristics of the seedlings. For this purpose, five varieties (Bati, Damani, Cara, Karibou and Safari) and two nursery management: soil and well plate, were compared on the experimental site of Peleforo GON COULIBALY University in Korhogo from January to February 2020. On soil, three doses of seeding (3, 4 and 5 g/m2) and, in the plate, 3 seeds/holes were tested. Morphological data were collected 40 days after sowing. In this sample, SPSS 22.0 software was used for statistical data processing. An analysis of variance incorporating the comparison of means according to Newman and Keuls at the 5% threshold was used to compare the morphological characteristics of the different varieties. It appears from this study that the seedlings reared in the well plate were averagely the highest with 17.32 cm. On soil, the heights varied from 14.77 cm (dose 05 g/m2) to 16.09 cm (dose 03 and 04 g/m2). Seeding doses of 03 and 04 g/m2 recorded the most robust seedlings in relation to the number of leaves (03), fresh (0.35 g) and dry (0.035 g) weights and dry matter rate of 10%. The Damani, Karibou and Safari varieties had the best performances concerning morphological characteristics. The robustness of the seedling is positively related to its size and the number of leaves. Besides well pate, a seeding rate of 04 g/m2 can be recommended for the management of the nursery on soil. The selection of seedlings in the nursery can be done based only on the size of the seedling and the number of leaves.

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.

scholarly journals Effect of Varieties and Planting Time on the Performance of Onion under Tropical Planes of Kerala

2021 ◽  
Author(s):  
S. Aruna ◽  
P. Indira ◽  
Jalaja S. Menon
Keyword(s):  
Significant Variation ◽  
Leaf Length ◽  
Planting Time ◽  
Plant Leaf ◽  
Allium Cepa L ◽  
Neck Thickness ◽  
Number Of Leaves ◽  
Overall Performance ◽  
Selection Of ◽  
Bulb Yield

Background: Onion (Allium cepa L.) is an important and indispensable item of every kitchen. It is used as a vegetable, spice and condiment and commands an extensive internal market. Even though onion is one of the major crops in India, its cultivation is not yet popular in Kerala. Successful onion production depends on the selection of varieties that are adapted to different conditions imposed by specific environment and best planting time. In this background, the current study aimed to evaluate five onion varieties in the tropical planes of Kerala and also to study the effect of different planting time and varieties on the performance of onion in Kerala.Methods: Five onion varieties were evaluated in four different dates of planting with an interval of fifteen days. Planting commenced from 10th November to 25th December 2017 in a split plot design with four replications. Yield attributing characters such as number of leaves per plant, leaf length, bolting percentage, neck thickness, bulb weight and yield were noted. Result: All the parameters showed a significant variation over different dates of planting. There was a significant variation in number of leaves per plant, leaf length, bolting percentage, total bulb yield and neck thickness among the varieties. Interaction effect of varieties and dates of planting was significant only for leaf length and total bulb yield. Highest bulb weight was recorded in 25th Nov. planting. Highest yield was recorded in 25th Nov. which was on par with 10th Dec. and 10th Nov. plantings. Arka Kalyan recorded a highest yield, which was statistically on par with Agrifound Dark Red and Arka Pragati. Varieties when planted on 25th Dec. recorded a lowest neck thickness. Agrifound White exhibited a non-bolting behavior in all the dates of planting. Overall performance and yield of onion was found to be better when planting was done on 25th November.

scholarly journals Vegetative growth of grain sorghum in response to phosphorus nutrition

2002 ◽  
Vol 59 (4) ◽  
pp. 771-776 ◽  
Author(s):  
Rafael Camacho ◽  
Eurípedes Malavolta ◽  
José Guerrero-Alves ◽  
Tomás Camacho
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Nutrient Solution ◽  
Dry Matter ◽  
Morphological Characteristics ◽  
Grain Sorghum ◽  
Growth Patterns ◽  
P Concentration ◽  
Number Of Leaves ◽  
Total P

Morphological variables such as phytomass, plant height, leaf area, number of leaves, have been used to express the influence of mineral nutrients on plant growth patterns, since the vegetative development responds, in general, favorably to fertilizer applications. This work evaluates the effect of P on both, some morphological characteristics and total [P] in the shoot of eight grain sorghum (Sorghum bicolor L. Moench) genotypes. Genetic materials were grown in nutrient solution under three concentrations of P (0; 0.5 and 1.0 mmol L-1). Plants were harvested 41 days after sowing, and leaf area per plant (LA), number of leaves (NL) per plant, root volume (RV), plant height (PH), root dry matter (RDM), shoot dry matter (SDM), total dry matter (TDM), RDM/SDM ratio, and total P concentration in shoot were determined. RDM/SDM was high for treatment P(0) and diminished about twice when P was added. Lack of applied P decreased the final NL and LA. Shoot [P] was positively correlated with solution [P], but the increase in P concentration in the nutrient solution from 0.5 to 1.0 mmol L-1 had a negative effect on growth. Both under deficiency and sufficiency conditions of P, Himeca-101 showed the best behavior in terms of RDM, SDM, TDM, RV, LA and NL. LA and PH were identified as the best indicators to predict dry matter yield of sorghum plants under P supply conditions.

scholarly journals Growth and mineral nutrition of baru (Dipteryx alata Vogel) in nutrient solution

2016 ◽  
Vol 20 (12) ◽  
pp. 1101-1106 ◽  
Author(s):  
Diana S. N. da Silva ◽  
Nelson Venturin ◽  
Cleber L. Rodas ◽  
Renato L. G. Macedo ◽  
Regis P. Venturin ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Dry Matter ◽  
Morphological Characteristics ◽  
Initial Growth ◽  
Root Shoot Ratio ◽  
Limiting Nutrients ◽  
Number Of Leaves ◽  
Collar Diameter ◽  
Nutrient Solutions ◽  
Dipteryx Alata

ABSTRACT This study analyzed the initial growth of baru in nutrient solutions with individualized omission of mineral nutrients in greenhouse. The experimental design was completely randomized with 13 treatments and four replicates: Complete Hoagland & Arnon solution and with individualized omissions of N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Mo and Zn. At 60 days the following morphological characteristics were evaluated: height, root collar diameter, number of leaves and number of leaflets. In addition, the Dickson quality index and root/shoot ratio were calculated and root dry matter, shoot dry matter and the contents and accumulations of nutrients in the shoots of the seedlings were analyzed. Analysis of variance of the collected data was performed using the computational program Sisvar. The growth of baru seedlings, except for the variable height, was influenced by the omission of nutrients in the nutrient solution and the main limiting nutrients are K, Ca, Mg, Fe, Mn, and Mo. The absorption of nutrients by baru plants occurs differently under the individualized nutritional omissions applied to the nutrient solution.

scholarly journals CORRELATION ANALYSIS OF FEATURES WHICH CHARACTERIZE YIELD AND PRODUCT QUALITY OF REPRESENTATIVES OF ALLIUM GENUS (RHIZIRIDEUM SUBGENUS, RHIZIRIDEUM G. DON EX KOCH SECTION)

2021 ◽  
Vol 250 ◽  
pp. 121-129
Author(s):  
M.I. Ivanova ◽  
◽  
A.F. Bukharov ◽  
A.I. Kashleva ◽  
Keyword(s):  
Ascorbic Acid ◽  
Plant Height ◽  
Dry Matter ◽  
Morphological Characteristics ◽  
Leaf Length ◽  
Hydroxycinnamic Acids ◽  
Biologically Active ◽  
Close Connection ◽  
Number Of Leaves ◽  
Number Of Shoots

Eight samples of representatives of Allium L. genus from Rhizirideum subgenus, Rhizirideum G. Don ex Koch section were studied in the conditions of the Moscow region. The presented study is planned to determine the correlation between various traits that contribute to yield increase and accumulation of biologically active compounds in leaves. Morphological characteristics (plant height, number of leaves per plant, number of shoots per plant, leaf length, leaf width and total leaf yield) and biochemical parameters (dry matter, nitrates, ascorbic acid, mono sugars, chlorophyll, carotene, flavanoids, hydroxycinnamic acids) were analyzed. Research on introduction and mobilization of genetic resources, preservation and sustention of genetic collection of representatives of Allium L. genus were carried out within the framework of the State Assignment. Dispersion analysis showed significant differences among the tested genotypes for all the studied parameters, namely phenotypic, biochemical and yield traits. The relation between the parameters was assessed using Pearson coefficient. A positive close connection was revealed between the plant height and leaf length (0.792), plant height and flavonoids (0.744), the number of shoots and the number of leaves (0.818), dry matter and nitrates (0.903), mono sugars and ascorbic acid (0.739), mono sugars and hydroxycinnamic acids (0.700), mono sugars and flavonoids (0.704), ascorbic acid and hydroxycinnamic acids (0.964), ascorbic acid and flavonoids (0.937), hydroxycinnamic acids and flavonoids (0.987). A negative close connection was noted between the height and number of shoots (-0.757), plant height and chlorophyll (-0.814), number of shoots and leaf length (-0.951), number of leaves and leaf length (-0.717), dry matter and mono sugars (-0.804 ), nitrates and mono sugars (-0.887). The revealed patterns are of interest for constructing a model of varieties and selection usage.

scholarly journals Progeny selection of "Myrocarpus frondosus" for improved growth vigor of seedlings

2020 ◽  
Vol 42 ◽  
pp. e23
Author(s):  
Dilson Antônio Bisognin ◽  
Kelen Haygert Lencina ◽  
Suelen Carpenedo Aimi ◽  
Maristela Machado Araújo ◽  
Cláudia Burin
Keyword(s):  
Linear Correlation ◽  
Morphological Characteristics ◽  
High Growth ◽  
Diameter Ratio ◽  
Stem Height ◽  
Shoot Height ◽  
Number Of Leaves ◽  
Growth Vigor ◽  
Selection Of ◽  
Half Sibling

In this study, we aimed to evaluate half-sibling progenies of Myrocarpus frondosus based on morphological characteristics and to select seedlings with high growth vigor and quality. Seedlings were evaluated for shoot height and diameter, shoot height/diameter ratio, and number of leaves. The shoot height showed the highest estimations of linear correlation with the other characteristics. The linear correlation of shoot height between two consecutive evaluations was high from 60 days of cultivation, indicating that selection should be applied after this period. Selection of 101 seedlings within the best progenies resulted in a genetic gain of 15.13% for shoot height. The greatest indirect gain from selection was for the shoot height/diameter ratio, whereas the lowest indirect gain was for the stem diameter. Myrocarpus frondosus progenies can be selected for shoot height at 60 days of nursery cultivation, resulting in high direct gain for growth and indirect gain for stem height/diameter ratio.

scholarly journals Morphogenetic Studies of Some Genotypes of Onion (Allium cepa L.) In Jos, Nigeria

2018 ◽  
Vol 8 (1) ◽  
pp. 33
Author(s):  
S. A. Sirajo ◽  
O. A. T. Namo
Keyword(s):  
Dry Matter ◽  
Morphological Attributes ◽  
Randomized Design ◽  
Allium Cepa L ◽  
Selection Indices ◽  
Neck Thickness ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Plateau State ◽  
Morphological Differences

The improvement of the fresh bulb and the economic dry matter yields of onion is dependent on the morphogenetic variability and the interrelationships amongst morphological attributes which can be used to determine the quality or performance of the crop. This research was aimed to study the morphogenetic characteristics of ten genotypes of onion (Ares, Violet de Galmi, Red Creole, “Wase”, “Dan Zaria”, “Dan Garko”, “Dan Giyawa”, “Bahaushe”, “Bakana” and “Yar Aleiro”) in Jos, Plateau State. Using the seedlings raised in the nursery, the genotypes were laid out in a completely randomized design (CRD) with four replicates. Results showed that morphological attributes differed amongst the genotypes, except the number of leaves per plant, neck thickness and horizontal bulb diameter. The study concludes that morphological differences, which are responsible for differences in fresh bulb and dry matter yields, exist amongst the different genotypes of onion. These attributes could be used as selection indices in the improvement of the onion.

scholarly journals Japanese cabbage: features of morphological and biochemical parameters of a promising sample

2020 ◽  
pp. 62-66
Author(s):  
L. L. Bondareva ◽  
A. I. Mineykina ◽  
T. O. Paslova ◽  
A. V. Molchanova ◽  
N. O. Paslova
Keyword(s):  
Ascorbic Acid ◽  
Dry Matter ◽  
Large Scale ◽  
Morphological Characteristics ◽  
Raw Material ◽  
Vegetable Crops ◽  
Economically Valuable Traits ◽  
Number Of Leaves ◽  
The Russian Federation ◽  
Active Formation

Relevance. New types of vegetable crops, previously unknown on a large scale, appear on the market. Japanese cabbage (Brassica rapa L. subsp. nipposinica (L. H. Bailey) Hanelt) is one of such crops for the middle zone of the Russian Federation. Due to the high content of vitamin C and microelements, Japanese cabbage can be classified as a rational balanced diet, including dietary one, and it can also be used as a raw material for the medical industry. Methods. The study of a promising sample of Japanese cabbage selection at the Federal Research Vegetable Center consisted in phenological observation of the stages of plant growth and development, morphological study of economically valuable traits, and biochemical analyzes of the content of ascorbic acid, dry matter and photosynthetic pigments. Results. The results of observations made it possible to establish the timing of the onset of phenological phases in Japanese cabbage plants and showed that the active formation of leaf mass in plants occurs 20 days after planting the seedlings. A close direct relationship was established between the duration of economic shelf life and the number of leaves in a plant (R = 0.95) and the length of the leaf plate (R=0.92). In the conducted biochemical studies, it was revealed that the content of ascorbic acid in the promising sample is 37.84±0.88 mg%, and the dry matter is in the range of 11.3±0.42%. The content of antioxidants in terms of HA and AA is within 5.72±0.72 and 19.5±2.46 mg/g, respectively. The study of the morphological characteristics and biological characteristics of Japanese cabbage plants contribute to the maximum use of the potential of vegetable crops in the conditions of the Moscow region.

Approaches for TEM imaging of cavitation in toughened nylon

1989 ◽  
Vol 47 ◽  
pp. 352-353
Author(s):  
Barbara A. Wood
Keyword(s):  
Morphological Characteristics ◽  
Structure Property ◽  
Polymer Systems ◽  
Selective Staining ◽  
Structure Property Relationships ◽  
Rubber Toughened ◽  
Shear Yield ◽  
Controversial Topic ◽  
Selection Of ◽  
Diamond Knife

A controversial topic in the study of structure-property relationships of toughened polymer systems is the internal cavitation of toughener particles resulting from damage on impact or tensile deformation.Detailed observations of the influence of morphological characteristics such as particle size distribution on deformation mechanisms such as shear yield and cavitation could provide valuable guidance for selection of processing conditions, but TEM observation of damaged zones presents some experimental difficulties.Previously published TEM images of impact fractured toughened nylon show holes but contrast between matrix and toughener is lacking; other systems investigated have clearly shown cavitated impact modifier particles. In rubber toughened nylon, the physical characteristics of cavitated material differ from undamaged material to the extent that sectioning of heavily damaged regions by cryoultramicrotomy with a diamond knife results in sections of greater than optimum thickness (Figure 1). The detailed morphology is obscured despite selective staining of the rubber phase using the ruthenium trichloride route to ruthenium tetroxide.

Agricultural practices of improve hardiness a winter-annual rape

2016 ◽  
Vol 2 (91) ◽  
pp. 57-62
Author(s):  
O.L. Kyrylesko
Keyword(s):  
Dry Matter ◽  
Agricultural Practices ◽  
Mineral Fertilizers ◽  
Farming Practices ◽  
Winter Rape ◽  
Output Capacity ◽  
Careful Preparation ◽  
Digestible Protein ◽  
Winter Annual ◽  
Selection Of

Influence of top-dressing is considered in the article, norms and terms of sowing on of winter-annual rape. The assessment conducted by the yield of green mass and seeds, output capacity by about 1 hectare of dry matter, feed units and digestible protein, the number of dead plants and density of herbage. Established that hardiness and productivity of winter rape can be enhanced through the use of farming practices as: by creating a moderate density of herbage, using optimal terms of planting and doses of mineral fertilizers, selection of predecessors and careful preparation of the soil ect. The mechanism of influence of agrotechnical receptions is exposed on of winter-annual rape through determination in roots before the offensive of the winter of separate biochemical indexes (sugar, starch, to protein).

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