Effet du chiendent sur l'orge ensemencée à différents écartements entre les rangs et doses de semis

1995 ◽  
Vol 75 (3) ◽  
pp. 613-618 ◽  
Author(s):  
D. Pageau ◽  
G. F. Tremblay
Keyword(s):  
Specific Weight ◽  
Kernel Weight ◽  
Yield Reduction ◽  
Row Spacing ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Spike Density ◽  
Spike Number ◽  
Viable Seeds ◽  
Narrow Row

A 4-yr study was conducted to evaluate the effect of two row spacings (10 and 20 cm) and five seeding rates of the cereal (100, 200, 300, 400 and 500 viable seeds m−2) on the interference between quackgrass [Elymus repens (L.) Nevski] and barley (Hordeum vulgare L. 'Cadette'). Narrow row spacings had no effect on the yield of barley in presence or absence of quackgrass. However, seeding rates influenced the productivity and development of barley when quackgrass was present. At a seeding rate of 100 seeds m−2, the yield reduction caused by the presence of quackgrass was 41%. When barley was seeded at 500 seeds m−2, the yield reduction was 19%. These yield reductions were mainly attributed to a decrease of spike density. In presence of quackgrass, the specific weight, number of kernels per spike, number of spikes per plant, 1000-kernel weight, harvest index and N concentration of grain were reduced. In contrast to a decrease of the row spacing, increasing seeding rate can be used to reduce interference between quackgrass and barley. Key words: Barley, quackgrass, interference, row spacing, seeding rate

EFFECTS OF SEEDING RATE AND ROW SPACING ON AGRONOMIC CHARACTERISTICS OF GLENLEA, PITIC 62 AND NEEPAWA WHEATS

1975 ◽  
Vol 55 (2) ◽  
pp. 363-367 ◽  
Author(s):  
K. G. BRIGGS
Keyword(s):  
Triticum Aestivum ◽  
Unit Area ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Test Weight ◽  
Row Spacing ◽  
Seeding Rate ◽  
Days To Maturity ◽  
Narrow Row ◽  
Plot Design

Three cultivars of wheat (Triticum aestivum L. em Thell.), Glenlea, Pitic 62 and Neepawa, were grown in a seeding rate and row spacing experiment at two locations in 1972 and 1973. In a split-plot design, row spacings of 15, 23 and 30 cm were used as main plots, and subplot seeding rates of 33.6, 67.3 and 100.9 kg/ha were applied for each cultivar. Data were collected on yield, days to maturity, plant height, lodging, kernel weight and test weight. The few significant effects of row spacing indicated that narrow row spacings tend to increase yield and decrease days to maturity. Higher seeding rates per unit area generally resulted in higher yields for all cultivars and, to some extent, earlier maturity. Glenlea wheat seeded at 100.9 kg/ha gave the highest yield in all tests, and at this seeding rate took an average 125 days to reach maturity, compared to 120 days for Neepawa and 129 days for Pitic 62. Seeding rate had virtually no effect on height, kernel weight or test weight of any of the wheats.

RENDEMENT DE DIFFÉRENTS MÉLANGES D’ORGE (Hordeum vulgare L.) ET D’AVOINE (Avenau sativa L.) ET PRODUCTIVITÉ DE CHACUNE DES ESPÈCES

1990 ◽  
Vol 70 (1) ◽  
pp. 91-97 ◽  
Author(s):  
D. PAGEAU
Keyword(s):  
Hordeum Vulgare ◽  
Avena Sativa ◽  
Yield Components ◽  
Specific Weight ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Viable Seeds

A two-year study was conducted at Normandin, Quebec to evaluate the behavior of mixtures of barley (Hordeum vulgare L.) and oats (Avena sativa L.) and productivity of their components. Eleven proportions of barley:oats (0:100, 10:90, 20:80, 30:70, 40:60, 50:50, 60:40, 70:30, 80:20, 90:10, 100:0) were evaluated at a seeding rate of 330 viable seeds m−2. Sophie barley and Laurent oats were used for their almost identical maturity. Yields of pure stands of barley were higher than those obtained from pure stands of oats. Mixtures comprising 50% or more of barley produced yields greater than those with less than 50% barley but yields were not higher than those from pure stands of barley. The proportions of barley and oat found in the grain mixture at harvest did not vary substantially from those used at sowing. The specific weight of the grain mixture at harvest increased concurrently with the increment of the proportion of barley at sowing.Key words: Barley, oats, mixture, yield, yield components

INFLUENCE DE LA FERTILISATION AZOTEE ET DE L’ECARTEMENT ENTRE LES RANGS DE CEREALES-ABRI RECOLTEES COMME FOURRAGE SUR L’ETABLISSEMENT DE LA LUZERNE

1983 ◽  
Vol 63 (2) ◽  
pp. 443-452 ◽  
Author(s):  
GILLES DEPUIS
Keyword(s):  
Fertilizer Application ◽  
Forage Yield ◽  
Yield Reduction ◽  
Average Weight ◽  
Row Spacing ◽  
Pure Stand ◽  
Seeding Rate ◽  
Companion Crop ◽  
Number Of Stems ◽  
Forage Yields

The effect of companion crop management on the establishment of alfalfa was evaluated. The studied variables included species of cereals, row spacing and seeding rate of companion crop, stage of maturity of the companion crop at harvest, and an additional nitrogen fertilizer application. The cereals were harvested as forage. In the year after the seeding year, the first yield of alfalfa was determined. In seven trials, forage yields of a pure stand of alfalfa were 3350 kg/ha in the first cut of the seeding year. These yields averaged 60% of forage yields obtained from the combination of alfalfa and companion crop. However, cereals substantially reduced the total digestible nutrients, crude protein and calcium contents of the forage as compared to the pure alfalfa. The additional 38 kg/ha of nitrogen at tillering provided an extra yield of 600 kg/ha. Row spacing had little or no effect on forage yield. Even though wider spacings has considerably reduced seeding rates increased spacing from 18 to 54 cm did not affect barley yield while wheat was reduced by 400 kg/ha and oat increased by 300 kg/ha. Also, the average number of stems per meter of row increased by 89% with an average weight gain of 23% for each stem at the 54-cm spacing. At the first cut in the year following establishment, yields of alfalfa established with a companion crop were equal to or lower than those in pure stand. Yield reductions varied from 0 to 13% with barley and wheat but approached 30% when oats were seeded in 18-cm rows. However, the yield reduction was only 14% in the 54-cm row spacing of oats.Key words: Medicago sativa L., nitrogen fertilization, companion crop

scholarly journals Barley response to seeding date in central Alberta

2003 ◽  
Vol 83 (2) ◽  
pp. 275-281 ◽  
Author(s):  
P. E. Juskiw ◽  
J. H. Helm
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Grain Filling ◽  
Kernel Weight ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Vegetative Period ◽  
Seeding Date ◽  
The Mean ◽  
Grain Filling Period

Seeding date is an important factor influencing productivity of barley (Hordeum vulgare L.). When conditions are conducive to early seeding or result in delayed seeding, producers need to know how cultivars will respond to these seeding situations. In this study, five cultivars (Abee, Harrington, Jackson, Noble and Virden) registered for western Canada were studied for 4 yr (1990 to 1993) when seeded early (late April or early May), in mid-May, in late-May, or late (mid-June) at Lacombe, AB. For all cultivars, early seeding resulted in grain yield advantages of 113 to 134% of the mean site yield, while with late seeding, grain yields were reduced to 54 to 76% of the mean site yield. The reduction in yield was least for Jackson, the earliest maturing cultivar tested. Late seeding reduced the period from sowing to emergence, vegetative period, grain-filling period, time from emergence to physiological maturity, test weight, grain yield, kernel weight, and tillers per plant; and increased plant height and percent thins. Late seeding had no significant effect on phyllochron, stand establishment, scald, lodging, protein content of the grain, kernel number per spike, and spikelet number per spike. Barley responded positively to early seeding in central Alberta, but when seeding was delayed (in this study to mid-June) the early and mid-maturing six-rowed cultivars with short phyllochrons performed better than the two-rowed and late six-rowed cultivars. Key words: Hordeum vulgare L., seeding rate, phenological development, grain quality, grain yield, components

Production tests of a new variety of sudan grass Evgeniya under the conditions of Lower Volga Region

2020 ◽  
Author(s):  
E. A. Vertikova ◽  
Keyword(s):  
Agricultural Production ◽  
Volga Region ◽  
Row Spacing ◽  
Seeding Rate ◽  
New Variety ◽  
Lower Volga Region ◽  
Sudan Grass ◽  
Lower Volga ◽  
Economically Valuable Traits ◽  
Viable Seeds

With the aim of introducing a new variety of Sudanese grass, Evgenia, into agricultural production in the Lower Volga region, they conducted production tests. Clarified the methods of cultivating varieties for seeds. As a result of the research, it was found that the Evgenia variety was characterized by high values of economically valuable traits. To obtain high-quality seeds, the variety is recommended to be sown with row spacing of 30 cm and with a seeding rate of 0.6-0.7 million pcs. viable seeds per hectare.

EFFECT OF DATE AND RATE OF SEEDING, ROW SPACING AND FERTILIZATION ON LENTIL

1989 ◽  
Vol 69 (2) ◽  
pp. 377-381 ◽  
Author(s):  
S. T. ALI-KHAN ◽  
F. A. KIEHN
Keyword(s):  
Seed Size ◽  
Lens Culinaris ◽  
Plant Population ◽  
Row Spacing ◽  
Seeding Rate ◽  
Seeding Date ◽  
Narrow Row ◽  
High Yields

The effect of seeding date, seeding rate, row spacing and fertilizer level were investigated in two cultivars of lentil (Lens culinaris Medik.), Eston and Laird, in Manitoba. High yields were obtained by early seeding, narrow row spacing (15 cm) and high seeding rate (100 plants m−2). Response to fertilizer levels was variable. Early seedings produced larger seeds. Effects of other treatments on seed size were not significant.Key words: Lentil, seeding date, seeding rate, plant population, fertilizer level

Effects of row spacing, seeding rate and nitrogen on yield of barley and wheat under zero-till management

1994 ◽  
Vol 74 (4) ◽  
pp. 703-711 ◽  
Author(s):  
G. P. Lafond
Keyword(s):  
Grain Yield ◽  
Triticum Aestivum L ◽  
Row Spacing ◽  
Continuous Cropping ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Canadian Prairies ◽  
Tillage Practices ◽  
Wide Range ◽  
Growing Conditions

Adopting water-conserving tillage practices on the Canadian prairies will protect the soil against erosion while conserving soil water. The use of tall-standing stubble to conserve water creates a dilemma for producers because maximum yields can only be obtained with narrow rows, and tall stubble may limit the use of narrow row spacings. A 4-yr study on a thin Black clay soil investigated the effects of three row spacings (10, 20 and 30 cm), six seeding rates (34, 67, 100, 134, 168 and 202 kg ha−1 for wheat and 27, 54, 81, 108, 134 and 161 kg ha−1 for barley) and two rates of N (low and high) in hard red wheat (Triticum aestivum L.), durum (Triticum durum L.) and barley (Hordeum vulgare L.) using a continuous cropping, zero-till production system. The yields of cereals were maintained with 30-cm row spacing over a wide range of growing conditions under zero-till management. Durum had a 5.8% yield advantage and barley a 2.4% advantage for the 30-cm row spacing over the 10-cm row spacing. The number of plants established and the number of spikes produced decreased as row spacing increased for all crops. But wider row spacing resulted in more kernels produced per spike, which, in the case of barley and durum, more than compensated for the lower number of spikes. Increasing seeding rates significantly improved grain yield in all crops and years because more spikes were produced. Grain yield was related to the reciprocal of seeding rate. The few row spacing × seeding rate interactions observed in 2 of 12 cases suggest that seeding rates need not be adjusted for changes in row spacing. The results obtained have important implications for equipment design and the ability to more easily handle high-crop-residue situations. Key words: Yield components, seeding rate, row spacing, yield compensation

YIELD PERFORMANCE OF UPRIGHT-LEAVED SELECTIONS OF WINTER WHEAT IN NARROW ROW SPACINGS

1967 ◽  
Vol 47 (5) ◽  
pp. 597-601 ◽  
Author(s):  
N. C. Stoskopf
Keyword(s):  
Winter Wheat ◽  
Spatial Arrangement ◽  
Row Spacing ◽  
Full Potential ◽  
Seeding Rate ◽  
Yield Performance ◽  
Grain Yields ◽  
Row Width ◽  
Check Variety ◽  
Narrow Row

Short-strawed, upright-leaved selections of winter wheat were compared with a tall, droopy-leaved check variety in wide (22.8- and 17.8-cm) and narrow (11.4- and 8.9-cm) row spacings at three seeding rates, to determine the best row width for highest grain yields and to determine whether an entry × row-spacing interaction could be measured. All entries produced more grain from narrow than from wide rows, in both years (1964 and 1966) and at all three seeding rates. This increase averaged 12.6% in the selections and 6.9% in the check variety. Highest yields were obtained at a seeding rate of 134 kg/ha, and in all cases the check variety outyielded the selections. The test demonstrated that higher grain yields were produced by a better spatial arrangement achieved by narrow row spacings, and that yield deficiencies in upright-leaved types could not be compensated for by a heavier seeding rate. While upright-leaved selections showed a greater increase in grain produced than did the check variety, no interaction with row spacings could be obtained statistically. It is suggested that lines which yield as high as check varieties in standard row-spacing tests (wide) may outyield the standard tall, droopy-leaved varieties in narrow rows. Short-strawed, upright-leaved selections emerging from the winter wheat program should therefore be tested in narrow row spacings so that these lines can express their full potential.

STUDIES OF RECOVERY FROM ARTIFICIALLY INDUCED LODGING IN SEVERAL SIX-ROW BARLEY CULTIVARS

1990 ◽  
Vol 70 (1) ◽  
pp. 173-181 ◽  
Author(s):  
K. G. BRIGGS
Keyword(s):  
Grain Yield ◽  
Kernel Weight ◽  
Yield Reduction ◽  
Growth Stages ◽  
Research Station ◽  
Hordeum Vulgare L ◽  
Lodging Resistance ◽  
Thousand Kernel Weight ◽  
University Of Alberta ◽  
Barley Cultivars

Artificial lodging treatments were applied to several six-row barley cultivars (Hordeum vulgare L.) in 1985 and 1986 in field plots at the University of Alberta Research Station, Edmonton, to determine the effects of lodging from the milk stage to maturity. For all cultivars the largest significant reduction in grain yield was obtained from lodging induced at the milk stage (average 21% yield reduction), with later lodging resulting in relatively less yield reduction (4% at preharvest). Significant effects of lodging treatments on thousand-kernel weight and hectoliter weight followed the same pattern. Incidence of disease (mainly scald) was significantly increased by the induction of lodging in one of the two years. Final lodging scores at maturity were significantly higher the later that lodging was induced, associated with generally reduced ability to recover from lodging. In 1 year of testing, the semidwarf cultivar Duke was found to be superior to the semidwarf cultivar Samson for lodging resistance, for ability to recover from lodging applied at all stages, for grain yield, thousand-kernel weight, and for disease resistance. In both years the cultivar Johnston had very poor lodging resistance and almost no ability to recover from lodging, whereas Leduc and Klondike were intermediate for these traits. A simple artificial lodging test is proposed for obtaining improved data on the lodging resistance and lodging recoverability of new cultivars.Key words: Lodging recovery, cultivar evaluation, disease level, grade reduction, growth stages, yield

Canada thistle (Cirsium arvense) management in canola (Brassica rapa) and barley (Hordem vulgare) rotations under zero tillage

2001 ◽  
Vol 81 (1) ◽  
pp. 183-190 ◽  
Author(s):  
J. T. O’Donovan ◽  
R. E. Blackshaw ◽  
K. N. Harker ◽  
D. W McAndrew ◽  
G. W. Clayton
Keyword(s):  
Brassica Rapa ◽  
Crop Yields ◽  
Dry Weight ◽  
Shoot Density ◽  
Cirsium Arvense ◽  
Row Spacing ◽  
Zero Tillage ◽  
Seeding Rate ◽  
Canada Thistle ◽  
Hordeum Vulgare L

The effect of in-crop herbicide rate, crop row spacing and seeding rate on Canada thistle [Cirsium arvense (L.) Scop.] management in two cycles of a canola (Brassica rapa L.)/barley (Hordeum vulgare L.) rotation was investigated under zero tillage at Vegreville, Alberta. The entire plot area received pre-harvest glyphosate from 1993 through 1995. In crop, either no herbicides were applied or clopyralid and dicamba/MCPA-K were applied at one-half or full recommended rates to canola and barley, respectively. In most cases, Canada thistle shoot density and dry weight were lower when the herbicides were used at either rate compared with no herbicide application. Pre-harvest glyphosate followed by either clopyralid or dicamba/MCPA-K in-crop reduced Canada thistle shoot densities from approximately 20 m–2 in 1993 to one or fewer m–2 in 1996. In-crop herbicides resulted in higher crop yields and revenues in 1993 and 1994, but not in 1996 when the Canada thistle infestation was relatively low. The effect of crop row spacing was inconsistent, and had little effect on Canada thistle shoot density or dry weight. In some cases, crop yield was higher at 20-cm than at 30-cm row spacing. Crop seeding rate had no effect on crop or Canada thistle variables. Key words: Cirsium arvense, zero tillage, pre-harvest glyphosate, clopyralid, dicamba/MCPA-K, crop row spacing, crop seeding rate.

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