EFFECT OF PLANT DENSITY ON YIELD AND COMPONENTS OF YIELD OF FABA BEAN

1987 ◽  
Vol 67 (1) ◽  
pp. 1-10 ◽  
Author(s):  
R. J. GRAF ◽  
G. G. ROWLAND
Keyword(s):  
Vicia Faba ◽  
Faba Bean ◽  
Yield Components ◽  
Field Experiments ◽  
Plant Density ◽  
Broad Bean ◽  
Yield Response ◽  
Seeding Rate ◽  
Product Price ◽  
Primary Yield

Field experiments using two Vicia faba L. cultivars, Outlook faba bean and Chinese broad bean, were grown at six densities (13, 25, 38, 50, 63 and 75 plants m−2) at two locations in Saskatchewan for 2 yr. A diminishing yield response to density was observed over this range of densities, with optimal economic seeding densities attained at 38 plants m−2. For the larger-seeded Chinese broad bean, simulations indicated that a lower density of 25 plants m−2 was adequate if the seed cost approached twice that of the product price. Density effects were highly significant (P < 0.01) for all yield components except seed weight in Chinese broad bean and seeds per pod in both cultivars. Of the primary yield components, pods per plant exhibited the greatest sensitivity to changes in plant density, with Outlook faba bean being affected to a much greater extent. The number of pods per pod-bearing node was the major determinant of yield and yield stability in the highly indeterminate Outlook faba bean. The importance of pods per pod-bearing node was reduced in the more determinate Chinese broad bean, where podded nodes per plant showed greater sensitivity to plant density changes. It is suggested that efforts to produce a more determinate cultivar by reducing the number of podded nodes per plant may result in a concomitant stabilization of pods per pod-bearing node.Key words: Vicia faba, yield components, plant density, faba bean, seeding rate

CROP-WEED COMPETITION STUDIES IN FABA BEAN (Vicia faba L.) UNDER RAINFED CONDITIONS

2001 ◽  
Vol 49 (3) ◽  
pp. 299-303 ◽  
Author(s):  
A. M. Tawaha ◽  
M. A. Turk
Keyword(s):  
Vicia Faba ◽  
Faba Bean ◽  
Yield Components ◽  
Field Experiments ◽  
Maximum Yield ◽  
Weed Competition ◽  
Growing Seasons ◽  
Yield And Yield Components ◽  
Vicia Faba L ◽  
Crop Weed Competition

Field experiments were conducted during the two growing seasons of 1999 and 2000 at the research farm of the Jordan University of Science and Technology (JUST) to study the effect of the time of weed removal on the yield and yield components of faba bean (Vicia faba L.). Removing weeds from 25 to 75 days after crop sowing led to significantly larger yields than on plots which were not weeded. Maximum yield was obtained in both years when weeds were removed thrice at 25, 50 and 75 days after crop sowing.

THE INFLUENCE OF SEED SIZE AND SEEDING RATE ON YIELD AND YIELD COMPONENTS OF BARLEY

1963 ◽  
Vol 43 (3) ◽  
pp. 330-337 ◽  
Author(s):  
Ahmet Demirlicakmak ◽  
M. L. Kaufmann ◽  
L. P. V. Johnson
Keyword(s):  
Seed Size ◽  
Yield Components ◽  
Field Experiments ◽  
Yield Response ◽  
Seeding Rate ◽  
Kernel Weights ◽  
Yield And Yield Components ◽  
Poor Indicator ◽  
Small Seed ◽  
Size Interaction

Field experiments with three seed sizes and three seeding rates of each of three barley varieties were conducted in 1959 and 1960 at Edmonton and Lacombe, Alberta. Data were obtained on emergence, culm counts, grain yields, and 1000-kernel weights. Although there was no effect of seed size on emergence, the culm counts and yields were highest for large seed and lowest for small seed over all rates, varieties, and tests. The differences between yields from large and small seed decreased slightly as the seeding rate increased, but the seeding-rate × seed-size interaction was not statistically significant. There were varietal differences in yield response to seeding rates. It was, therefore, concluded that seeding rates in test plots should conform to those used in farming practice. The rate of seeding had a significant influence on 1000-kernel weights. The lowest rate produced the heaviest kernels and the highest rate produced the lightest kernels in each of four tests. Tillering capacity alone was a poor indicator of resulting yields. Results from further experiments, involving four seed categories of nine varieties in two tests, corroborated the above findings.

scholarly journals Fall and spring seeding date effects on herbicide-tolerant canola (Brassica napus L.) cultivars

2004 ◽  
Vol 84 (2) ◽  
pp. 419-430 ◽  
Author(s):  
G. W. Clayton ◽  
K. N. Harker ◽  
J. T. O’Donovan ◽  
R. E. Blackshaw ◽  
L. M. Dosdall ◽  
...  
Keyword(s):  
Field Experiments ◽  
Plant Density ◽  
Early Spring ◽  
Yield Response ◽  
Management Options ◽  
Brassica Napus L ◽  
Seeding Date ◽  
Herbicide Tolerant ◽  
Root Maggot ◽  
Crops Yield

More flexible and effective weed control with herbicide-tolerant B. napus canola allows for additional seeding management options, such as fall (dormant) and early spring (ES) seeding. Field experiments were conducted at Lacombe and Beaverlodge (1999–2001), Didsbury (1999–2000), and Lethbridge (2000–2001), Alberta, Canada, primarily to evaluate the effect of fall (late October-November), ES (late April-early May), and normal spring (NS) (ca. mid-May) seeding dates on glufosinate-, glyphosate-, and imidazolinone-tolerant canola development and yield. Fall seeding resulted in 46% lower plant density and nearly double the dockage than spring seeding. ES-seeded canola had 19% higher seed yield and 2.1% higher oil content than fall-seeded canola. ES seeding significantly increased yield compared to fall-seeded canola for 8 of 10 site -years or compared to NS seeding for 4 of 10 site-years; ES-seeded canola equalled the yield of NS-seeded canola for 6 of 10 site-years. Yield response to seeding date did not differ among herbicide-tolerant cultivars. Seeding date did not influence root maggot damage. Seeding canola as soon as possible in spring increases the likelihood of optimizing canola yield and quality compared to fall seeding and traditional spring seeding dates. Key words: Dormant seeding, seeding management, root maggot, herbicide-resistant crops, yield components, operational diversity

FERTILITY COMPONENTS IN A FABA BEAN LINE NEAR-ISOGENIC FOR MALE STERILITY

1986 ◽  
Vol 66 (2) ◽  
pp. 235-239 ◽  
Author(s):  
G. DUC ◽  
G. G. ROWLAND ◽  
J. PICARD
Keyword(s):  
Male Sterility ◽  
Vicia Faba ◽  
Seed Yield ◽  
Faba Bean ◽  
Yield Components ◽  
Male Sterile ◽  
Potential Yield ◽  
Insect Pollinator ◽  
Insect Pollinators ◽  
Vicia Faba L

A near-isogenic faba bean (Vicia faba L.) line, segregating in a 1:1 ratio of male-fertile to male-sterile plants, was used to study the importance of insect pollinators on ovule fertilization and yield components of the first five flowering nodes. The fertilization of ovules from open-pollinated plants at the higher insect pollinator site of Dijon, France was 83%, as compared with 50% at the lower insect pollinator activity site of Saskatoon, Canada. No significant differences in total fertilized ovules were found between male-fertile and male-sterile plants at Dijon, but male-fertile plants at Saskatoon had significantly more fertilized ovules than male-sterile plants. Seed production on the first five flowering nodes was significantly greater at Saskatoon. Thus, while insect pollinators are important in determining the potential yield of a faba bean plant, other factors, such as environment, determine the ultimate yield.Key words: Vicia faba, ovule fertilization, seed yield, faba bean, male sterility

Estimating the economic optimal target density of hybrid canola based on data from a western Canadian meta-analysis

2020 ◽  
Author(s):  
Murray D. Hartman ◽  
Scott R. Jeffrey
Keyword(s):  
Plant Density ◽  
Meta Analysis ◽  
Yield Response ◽  
Western Canada ◽  
Seeding Rate ◽  
Optimal Density ◽  
Herbicide Resistant ◽  
Plant Densities ◽  
Optimal Target ◽  
The Relationship

Canola production in western Canada has expanded such that in many regions canola area rivals the area seeded to wheat. This change can be mainly attributed to adoption of herbicide resistant hybrid varieties, and resulting higher relative profitability. Producers responded to higher seed prices by reducing seeding rates, leading to plant densities that were often lower than industry recommendations. The study objectives were to examine canola yield response to plant density and assess economically optimal density levels relative to industry recommendations and grower practices. A meta-analysis approach was applied to yield response and plant density data with herbicide resistant hybrid canola from multiple studies. Three alternative marginal yield-density functions were estimated and used to calculate economically optimal plant density. Sensitivity of results to key parameters was assessed. Resulting optimal density levels under recent average prices, seed size and emergence were 62-73 plants m-2, consistent with industry recommendations for western Canada. Recent field surveys report lower densities than this range, suggesting that producers are seeding at less than optimal rates. However, there is significant uncertainty associated with canola production, and interaction of seeding rate with other factors. These would impact on optimal plant density, although much of the uncertainty remains until well after seeding. The empirical results represent a foundation for development of more detailed models, highlight the significance of the relationship between plant density and economically optimal yield, and suggest the need to develop decision making tools to support producers in making canola planting decisions.

Sign in / Sign up

Export Citation Format

Share Document