scholarly journals Effect of Row Spacing on Seed Yield, Yield Components and Seed Quality of Alfalfa

2015 ◽  
Vol 15 (1) ◽  
pp. 85
Author(s):  
Dragoljub Beković ◽  
Rade Stanisavljević ◽  
Milan Biberdžić ◽  
Slaviša Stojković ◽  
Jasmina Knežević
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Seed Quality ◽  
Germination Rate ◽  
Row Spacing ◽  
Grain Number ◽  
Alfalfa Seed ◽  
Thousand Seed Weight

Under agro-environmental conditions of Southern Serbia, the re­search was conducted over a three-year period to evaluate the effect of row spacing on seed yield, yield components and seed quality of alfalfa cv. ’K-23’. The average seed yield of alfalfa was highest at a row spacing of 40 cm (271.7 kg ha-1), followed by row spacing of 20 cm (249.4 kg ha-1) and 60 cm (244.0 kg ha-1). The highest and lowest number of inflo­rescences per stem were obtained in rows spaced 60 cm (13.37 inflo­rescences/stem) and 20 cm apart (8.57 inflorescences/stem), respectively. The widest row spacing of 60 cm (7.15 pods / inflorescence) resulted in the highest number of pods per inflorescence, whereas the lowest number was produced at 20 cm spacing (5.50 pods / inflorescence). Grain number per pod ranged from 3.55 (at 20 cm row spacing) to 4.05 (at 60 cm). The highest quality of alfalfa seed during the three years of the research was obtained at the widest row spacing (60 cm). Thousand-seed weight was highest at 60 cm and lowest at 20 cm (1.97 g and 2.07 g, respectively). The highest average values for seed germination rate were reported for 60 cm row spa­cing (88.00%) and the lowest for 20 cm row spacing (85.76 %).

Crop density and seed production of tall fescue (Festuca arundinacea Schreber). 2. Reproductive components and seed characteristics

1999 ◽  
Vol 79 (4) ◽  
pp. 543-549 ◽  
Author(s):  
N. A. Fairey ◽  
L. P. Lefkovitch
Keyword(s):  
Seed Yield ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Yield Components ◽  
Seed Weight ◽  
Seed Quality ◽  
Plant Density ◽  
Initial Density ◽  
Row Spacing ◽  
Seed Characteristics

The population density and spatial arrangement of plants may influence the productive life and performance characteristics of a perennial grass-seed crop. A study was conducted to determine the effects of the initial density (1.6, 3.1, 6.3, 12.5, 25, 50 and 100 plants m−2) and row spacing (20, 40, and 80 cm) of plants on reproductive yield components and seed characteristics of tall fescue (Festuca arundinacea Schreber), over 3 consecutive production years (1991–1993) in the Peace region of Canada. The weight proportion of cleaned-to-uncleaned seed was 85–86% for the three lowest plant densities and then decreased, as density increased, to 82% at 12.5 plants m−2 and 66% at 100 plants m−2. The 1000-seed weight decreased as density increased and ranged from 1.68 to 2.22 g (i.e., 595 000 to 450 000 seeds kg−1). The specific seed weight ranged from 18 to 31 kg hL−1; it differed among years, but the effect of plant density was inconsistent. The germination capacity of the seed was unaffected by plant density, but differed among years; it averaged 87%, 88% and 59% in 1991, 1992 and 1993, respectively. The seed yield/plant, the number of panicles/plant, and the number of seeds/plant decreased exponentially as plant density increased. The number of clean seeds/panicle decreased, as plant density increased, in the first year but was less affected subsequently, particularly with the 20-cm row spacing. The seed yield was correlated closely with the number of panicles m−2 (r = 0.659***). An initial density no greater than 25 plants m−2 in rows spaced 20–40 cm apart enhanced seed quality by producing a greater proportion of clean seed which had a higher 1000-seed weight. Such a plant density, however, is at the low end of the optimum range for maximizing seed yield per unit land area. Key words: Tall fescue, Festuca arundinacea Schreber, population density, plant and row spacing, yield components, seed quality

scholarly journals Effects of seed rates and row spacing on yield and yield components of linseed (Linum usitatissimum L) at Dabat district of North Gondar Zone, Ethiopia

2020 ◽  
Vol 7 (1) ◽  
pp. 1-5
Author(s):  
Daniel Tadesse ◽  
Yenus Ousman ◽  
Mequanint Teshome
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Row Spacing ◽  
Seeding Rate ◽  
Seed Rate ◽  
Main Effect ◽  
Yield And Yield Components ◽  
Poor Seed ◽  
Thousand Seed Weight

The area coverage and productivity of linseed decreased from time to time; even there is no crop package and recommended row spacing and seed rate at regional level due to lack of attention by researchers and also by farmers. In Ethiopia, linseed has been cultivated for two primary purposes, seed and oil use. Its production in Ethiopia country is characterized by low input, low yield and poor product quality mainly due to attitude and poor management practices such as lack of proper weed management system, poor seed and field hygiene, poor seed bed preparation, inadequate plant nutrition, inappropriate seeding rate and spacing (mostly broad casting), improper threshing ground and improper cleaning. Field experiment was carried out to evaluate the effects of seed rate and row spacing on the yield and yield components of linseed, during 2017/2018 cropping season at Dabat district, North Western Ethiopia. KULUMSA1 (CHILALO) was used as test crop. Factorial combinations of three row spacing, (20, 25, and 30 cm) and three seed rates, (40, 45 and 50kgs) were laid out in RCBD with three replications.  Data regarding different parameters were recorded from days to sowing up to different stages. Statistical analysis of data showed that most of the parameters were affected by the main effects of Seed Rates and Row spacing. The main effect of seed rate was highly significant for days maturity, thousand seed weight and harvest index of linseed. More over it was significant for days to flower and number of capsule per plant, but it was not significant to plant height and bio mass yield. The main effect of row spacing was significant for days to maturity. The interaction of seed rate and row spacing was highly significance (p<0.05) for number of primarily branch per plant and seed yield. It was not significant on number of seeds per capsule, number of capsule per plant and thousand seed weight. The main finding of this research is highest seed yield (1771 kg ha-1 ) was obtained at 40kg ha-1 x 25 cm of row spacing while the lowest seed yield (752kg ha-1) was recorded at 50 kg ha-1 x 30 cm. 40kg ha-1 and 25cm is recommended to increase yield of linseed and its components. In conclusion the effect of seed rate and row spacing affects the important yield components of linseed.

Is the flag leaf important in perennial ryegrass seed production?

2010 ◽  
Vol 14 ◽  
pp. 67-73
Author(s):  
J.A.K. Trethewey ◽  
M.P. Rolston
Keyword(s):  
Seed Yield ◽  
Perennial Ryegrass ◽  
Yield Components ◽  
Seed Weight ◽  
Photosynthetic Capacity ◽  
Flag Leaf ◽  
Active Radiation ◽  
Seed Yield Components ◽  
Seed Fill ◽  
Thousand Seed Weight

In cereals, the importance of the flag leaf for contributing carbohydrate during seed fill is well documented. However, in ryegrass this relationship is not so clear. This paper reports on an investigation of the effect on seed yield components of reduced photosynthetic capacity to the flag leaf, stem and head of perennial ryegrass (Lolium perenne). The hypothesis was that reduced photosynthetic capacity of the flag leaf does not affect seed yield components in perennial ryegrass. Following flowering, photosynthetic capacity was reduced by defoliation or shading the flag leaf, stem, or head of individual tillers. Seed yield components were measured at harvest. Reduced photosynthetically active radiation (PAR) to the flag leaf and stem did not affect thousand seed weight or seed yield when compared with control plants whereas reducing PAR to the head had a significant effect. The seed head itself may be more important than the flag leaf during seed fill, but when the seed head is shaded substantial re-mobilisation of stored carbohydrates can occur. Keywords: flag leaf, green leaf area, Lolium perenne, photosynthetically active radiation, seed fill, seed yield, thousand seed weight, water-soluble carbohydrates

Variability and Correlation Between the Seed Yield, Seed Yield Components and Quality of Alfalfa Seed

2010 ◽  
pp. 347-352
Author(s):  
Rade Stanisavljevic ◽  
Jasmina Milenkovic ◽  
Jasmina Radovic ◽  
Dragoslav Djokic ◽  
Dragan Terzic ◽  
...  
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Seed Yield Components ◽  
Alfalfa Seed

Influence of year and row spacing on yield component andseed yield in Alfalfa (Medicago sativa L.)

2016 ◽  
Author(s):  
Wenxu Zhang ◽  
Fangshan Xia ◽  
Yin Li ◽  
Mingya Wang ◽  
Peisheng Mao
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Northwest China ◽  
Yield Component ◽  
Row Spacing ◽  
Growing Seasons ◽  
Seed Yield Components ◽  
Alfalfa Seed ◽  
Medicago Sativa L ◽  
Semi Arid

A 5 year field experiment was conducted to investigate the influence of different yearly climatic features and row spacing on seed yield and seed yield components during the 2008-2012 growing seasons in semi-arid soils in northwest China. Rows pacing treatments were 30, 60, 90, and 120 cm. Seed yield and some seed yield components were determined for all treatments. The year affected seed yield components markedly, but row spacing except for the quantity of seeds per pod. The interaction of year and row spacing have a significant impact on racemes per square meter and seed yield (P less than 0.05). The highest seed yield was gained in the fifth year (409.83 kg ha-1) with 60 cm row spacing (456.30kg ha-1). These results indicated that alfalfa should be planted with 60cm row spacing, which was most productive for improving the alfalfa seed yield in semi-arid lands.

scholarly journals The effect of plant density on seed yield and quality of carrot (Daucus carota L.)

2010 ◽  
Vol 14 ◽  
pp. 75-83
Author(s):  
C.N. Merfield ◽  
J.G. Hampton ◽  
S.D. Wratten ◽  
P. Prapanoppasin ◽  
P. Yeeransiri
Keyword(s):  
Seed Yield ◽  
Daucus Carota ◽  
Seed Quality ◽  
Plant Density ◽  
Seed Vigour ◽  
Daucus Carota L ◽  
Yield And Quality ◽  
Plant Densities ◽  
Thousand Seed Weight

The hypothesis that by increasing carrot (Daucus carota) plant density the contribution to seed yield by the primary umbels would increase, and that therefore both seed yield and seed quality would increase, was examined in two experiments in different years in Canterbury. A radial trial design provided plant densities from 2 to 84 plants/m2 and from 4 to 100 plants/m2 in experiments one and two respectively. Seed yield increased with increasing plant density in both experiments, and at the highest density the primary umbels contributed 90% (experiment one) and 60% (experiment two) of the seed yield. In both experiments seeds from the primary umbels had a greater thousand seed weight and higher germination than those from the other order umbels, and for the second experiment they also had higher seed vigour. The quality of seeds from the primary umbels was consistently higher than that of seeds from the secondary umbels across all plant densities, and for the latter, both germination and seed vigour declined as plant density increased. These results therefore support the hypothesis, and densities higher than the 20 plants/m2 currently used commercially have the potential to increase both seed yield and quality. Keywords: seed production, primary umbels, germination, vigour, plants/m2

Sign in / Sign up

Export Citation Format

Share Document