Effets de quelques pratiques horticoles de conduite des plantes sur la production de roses coupées

2002 ◽  
Vol 80 (5) ◽  
pp. 470-477
Author(s):  
Serge Gudin ◽  
Anne Coulon ◽  
Manuel Le Bris
Keyword(s):  
Cycle Time ◽  
Yield Components ◽  
Production Management ◽  
Rosa Hybrida ◽  
Plant Management ◽  
Flower Production ◽  
Bud Sprouting ◽  
Stem Quality ◽  
Autumn And Winter ◽  
Shoot Bending

Four different plant management treatments, corresponding with different existing growing practices, were compared for flower production of Rosa hybrida L. cv. Meiqualis plants grown for 1 year in a greenhouse in the south of France. Two of them used shoot bending during plant formation and subsequent production management. The harvest level practiced on the thickest stems differentiated these two treatments. Two other treatments consisted in using shoot removal and pruning during plant formation. In the first one, during production management, unmarketable shoots were removed by pinching, whereas they were bent and left on the plant in the second one. This last treatment resulted in the highest yield of marketable stems and stem quality after 1 year, although the treatment using shoot bending during plant formation and production associated with a high harvest level on the thickest stems produced the largest quantity during autumn and winter. The results are discussed with reference to different yield components determined by the different plant management treatments applied, such as inter-flush cycle time, bud sprouting, occurrence of certain types of unmarketable stems (blind shoots and bowed peduncled stems), and development of new bottom breaks.Key words: shoot bending, bottom breaks, blind shoots, bowed stems, production, Rosa hybrida L.

scholarly journals Productivity of Cowpea (Vigna unguiculata (L) Walp) genotypes under Varying Population Densities

2021 ◽  
pp. 4089-4100
Author(s):  
Afolabi Michael Segun ◽  
Ojeleye Abiola Elizabeth ◽  
Olalekan Kazeem Kolapo ◽  
Shittu Kabiru Alani
Keyword(s):  
Population Density ◽  
Grain Yield ◽  
Plant Height ◽  
Interaction Effect ◽  
Yield Components ◽  
Dry Matter ◽  
Growth Parameters ◽  
Appreciable Effect ◽  
Population Densities ◽  
Flower Production

To investigate the influence of three population densities (88,000, 44,000, and 29,000 plants/ha) on the growth and yield of five cowpea varieties (IT97K-461, IT97K-568-18, IT98K-131-2, IT99K-1060 and IT99K-`245), a field experiment was conducted at Teaching and Research farm of Landmark University. Growth parameters such as germination count, plant height, and number of trifoliate leaves per plant, number of branches per plant, flower production dynamics and dry matter determination were measured, while harvest index, shelling percentage, number of seeds per pod, see weight pods per plant and grain yield were measured at harvest as yield components. Data were subjected to statistical analysis of variance (ANOVA) using SAS Institute. Significant means were separated using Duncans Multiple Range Test at 5% probability level. Results revealed that there were no constant trends in growth parameters response to population density. Plant height and flower production decreased with increased population density, while number of leaves per plant and dry matter increased with increasing population density. There was no appreciable effect of population density on branching. All these parameters were significantly (p≤0.05) affected with variety, while there was no significant (p≤0.05) interaction effect. Most yield components decreased with increasing population density while grain yield however, slightly increased with increasing population density. All yield parameter and grain yield significantly varied with variety, while there were no appreciable interaction effect. In conclusion, a population density of 88,000 plants /ha gives the highest growth and grain yield. While, variety, IT97-568-18 gives the higher growth and grain yield than other varieties studied.

Evaluation of the Ornamental Potential of Safflower (Carthamus tinctorius L.)

2019 ◽  
pp. 1-13
Author(s):  
Gérsia Gonçalves De Melo ◽  
Djayran Sobral Costa ◽  
Vivian Loges ◽  
Simone Santos Lira Silva ◽  
Demerson Arruda Sanglard ◽  
...  
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Carthamus Tinctorius ◽  
Stem Diameter ◽  
Flower Buds ◽  
Flower Production ◽  
Randomized Design ◽  
Stem Quality ◽  
Completely Randomized Design ◽  
Number Of Branches

Aims: To evaluate the ornamental potential of two safflower genotypes (Carthamus tinctorius L.): ICA 73, ICA 193, grown under protected environment. Place and Duration of Study: Department of Agronomy of Federal Rural University of Pernambuco, between March and May 2017. Methodology: The methodology addressed evaluated the performance of the two genotypes, through three experiments. The first experiment was carried out in a completely randomized design, being evaluated: plant height; stem diameter; leaf dentin; spinescent margin of the leaves; number of branches; number of flower buds; spinescent margin of the bracts; flowering, and flower production. The second one was conducted in a randomized complete block design in a factorial scheme, and the following variables were evaluated: plant height; stem diameter; number of branches; number of flower buds; and flower production. Finally, the third experiment used a completely randomized design in a factorial scheme and evaluated the variables: Number of flowers; number of flower buds and post-harvest durability. The analysis of variance was performed using the F test at 5% of probability and, afterwards, the regression or comparison analysis of averages by the Tukey test at 5% of probability. Results: The ICA 73 access showed plants with high flower production and the ICA 193 exhibited plants with weak or moderate spinescent margin of the leaves and bracts, besides good uniformity of the anthesis of the flowers. Conclusion: Both accesses showed ornamental potential, demonstrating precocity, beauty and durability of the flowers. The density of one plant was the most favorable for pot plant and cut flower. The semi-open flowers harvest point was the best for maintaining the stem quality.

Model to Determine the Economic Scale of Giga-Fab for Wafer Fabrication by Simulation

2014 ◽  
Vol 543-547 ◽  
pp. 4487-4490 ◽  
Author(s):  
Ying Mei Tu ◽  
Che Hao Chang ◽  
Chun Wei Lu
Keyword(s):  
Cycle Time ◽  
Production Management ◽  
Analytical Data ◽  
Production Capacity ◽  
Simulation Software ◽  
High Tech ◽  
Production Cycle ◽  
Increase Risk ◽  
Production Flexibility ◽  
Plant Simulation

Semiconductor manufacturing is a capital-intensive and high-tech industry. In order to reduce production cycle time and increase production flexibility, the semiconductor manufacturers will expand the capacity in the existed fab and build up new fabs. However, the expandability of production capacity is not infinite since the huge fab scale will increase risk of production management. Therefore, it is necessary to find out the factors which will influence the performance of fab scale. This research uses the eM-plant simulation software to construct a simulation environment to conduct simulation experiment. The experimental environments were divided into two parts and named as high and low product mix complexity separately. Furthermore, three more factors were taken into accounts, which included stability of machine, variation of fab scale and releasing rate. By simulation, the analytical data is collected and analyzed its trend in these different environments. Simulation results reveal the significance of factors under different environments. Based on these results, the managers can conclude an appropriate fab scale in giga-fab, which will help to reduce the cycle time of products and increase the total throughput of giga-fab.

scholarly journals Saltgrass Clones' Spike Production Affected by Sampling Time, Nitrogen Fertilization, and Burning

2008 ◽  
Vol 18 (3) ◽  
pp. 379-383
Author(s):  
Hrvoje Rukavina ◽  
Harrison G. Hughes
Keyword(s):  
Seed Production ◽  
Nitrogen Fertilization ◽  
Cold Hardiness ◽  
Production Management ◽  
N Fertilization ◽  
Sampling Time ◽  
Environmental Adaptation ◽  
Distichlis Spicata ◽  
Field Sampling ◽  
Flower Production

Saltgrass (Distichlis spicata) has received increased attention as a result of its low input needs. A good understanding of the factors that influence greater flower production in saltgrass clones would facilitate seed production management and hybridization in the breeding program. Therefore, the influence of sampling time from the field, nitrogen (N) fertilization, and burning on flowering spike production of five saltgrass clones from three cold-hardiness zones were evaluated over 2 years. Clones were sampled from the field at two times (August and November) in the first and at three times (August, November, and January) in the second experimental year. After field sampling, clones were transferred to the greenhouse and received N and burning treatments. N fertilization increased number of spikes (flowering) for all saltgrass clones by ≈30% in both experimental years. In the second experimental year, the number of spikes was increased to a greater extent when N was applied in combination with burning treatment as compared with N without burning. The burning treatment had a greater effect on the number of spikes in plants sampled in August as compared with those sampled in November and January. Sampling in November increased flowering in three clones as compared with August sampling, but with the greatest effect in clone A1540. Sampling in January further increased the number of spikes in clones 1490 and A1610 but with no significant effect on the number of spikes in clone A1540. Environmental adaptation associated with origin of saltgrass clones is a major factor that influences flowering spike production.

scholarly journals Determining Optimal Bulb Storage and Production Methods for Successful Forcing of Cut Pineapple Lily

2015 ◽  
Vol 25 (5) ◽  
pp. 608-616 ◽  
Author(s):  
Alicain S. Carlson ◽  
John M. Dole
Keyword(s):  
Storage Temperature ◽  
Planting Density ◽  
Stem Length ◽  
Cut Flower ◽  
Production Environment ◽  
Production Methods ◽  
Flower Production ◽  
Stem Quality ◽  
Production Temperature ◽  
Postharvest Handling

Pineapple lily (Eucomis hybrids) has long, striking inflorescences that work well as a cut flower, but information is needed on proper production methods and postharvest handling protocols. The objective of this study was to determine the effects of bulb storage temperature and duration, production environment, planting density, and forcing temperatures on cut flower production of ‘Coral’, ‘Cream’, ‘Lavender’, and ‘Sparkling Burgundy’ pineapple lily. Stem length was greater in the greenhouse than the field and at the low planting density. Plants in the field at the low planting density had the shortest stem length for ‘Coral’ and ‘Cream’, but still produced marketable lengths of at least 30 cm. Planting density did not affect ‘Lavender’ and ‘Sparkling Burgundy’ stem length or number of marketable stems. The productivity (number of marketable stems per bulb) was affected only by planting density for ‘Coral’ and planting environment for ‘Cream’. Differences in stem quality and productivity differed for each cultivar and planting density over the next two seasons. The productivity of ‘Coral’ increased significantly from year to year, while the productivity of ‘Cream’ only significantly increased between the first and second years. The low planting density resulted in slightly more stems per bulb for ‘Coral’ over the next two seasons. Emergence after bulb storage treatments was highest in treatments where the bulbs were not lifted from the substrate and were subsequently grown at 18 °C. Bulbs grown in the warmest (18 °C) production temperature flowered soonest and had shorter stem lengths. For earliest flowering, bulbs should be stored in substrate in cool temperatures of at least 13 °C and forced at warm temperatures of at least 18 °C.

Sign in / Sign up

Export Citation Format

Share Document