Effect of Plant Spacing on Carbohydrates in Roots and on Components of Seed Yield in Alfalfa (
            <i>Medicago sativa</i>
            L.)
            <sup>1</sup>

Dovrat, A.; Levanon, Dan; Waldman, Miriam

doi:10.2135/cropsci1969.0011183x000900010011x

Cited by 13 publications

(6 citation statements)

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“…In contrast in the second year the low sowing rate produced more racemes/m 2 and heavier seed weight, because plants had had time to expand in size by developing more branches, and subsequently more racemes and seeds (Askarian 1993). These results support the findings of Dovrat (1969) and Taylor & Marble (1986). Branching may also be manipulated to increase seed yield per plant by increasing the number of primary, secondary, and tertiary lateral shoots at low sowing rates.…”

Section: Discussionsupporting

confidence: 86%

Effect of row spacing and sowing rate on seed production of lucerne (Medicago sativaL.) cv. Grasslands Oranga

Askarian

Hampton

Hill

1995

New Zealand Journal of Agricultural Research

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Present address: Ministry of Jihad-e-Sazandagi, Tehran, Iran.Abstract The effects of row spacing (15, 30, 45, and 60 cm) and sowing rate (1, 3, 6, and 12 kg/ha) on lucerne seed yield and its components were investigated at Massey University, Palmerston North, New Zealand, over two seasons. In the first year, seed yield from the 15 cm row spacing was significantly lower than that from the 30, 45, and 60 cm row spacings, whereas sowing rate had no effect on seed yield. In the second year crop, row spacings did not significantly affect seed yield, but the seed yield from the 1 kg/ha sowing rate was significantly greater than that for other sowing rates because harvestable racemes/m 2 and thousand seed weight were significantly increased. Seed yield over 2 years of the experiment was highest at the 1 kg/ha sowing rate and for the 30 and 45 cm row spacings. However, there were no significant interactions between row spacing and sowing rate for seed yield. The average seed yield for all treatments was 127 and 187 kg/ha for the first and second year respectively. Neither row spacing nor sowing rate had any effect on the quality of harvested seed.

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Section: Discussionsupporting

confidence: 86%

Effect of row spacing and sowing rate on seed production of lucerne (Medicago sativaL.) cv. Grasslands Oranga

Askarian

Hampton

Hill

1995

New Zealand Journal of Agricultural Research

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“…These results may be due to increased number of plants per unit area that resulted in high seed yield per unit area. This is in agreement with Abadouz et al (2010), Niya et al (2003), Yongjun andJichun (1998),Vuckovic (1996), Askarian et al (1995), Abushakra et al (1969), Moyer et al (1991) and Dovrat et al (1968) who reported that seed yield increased with row spacing decreased because of suitable plant in unit, suitable settlement condition was provided, so the plant could produce more reproductive parts by using light and environment. This is disagreement with Carvajal and Benitez (1986), Koocheki and Marashi (1989), Al-Noaim and Koriem.…”

Section: Effect Of Harvesting Treatmentsupporting

confidence: 83%

Seed Yield of Two Alfalfa Genotypes Under Different Environments

Abdelgawad

Metwally

Aly

2012

Journal of Plant Production

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A field experiment was conducted at the Agricultural Experiments and Researches Station, Cairo University, Giza, Egypt from 2008 to 2011 to study the influence of cutting treatment before seed production and plant densities on seed yield of two alfalfa genotypes (Laboon and El-wadi El-Gadid). In General, El-wadi El-Gadid surpassed Laboon in seed yield/feddan. Cutting genotypes twice before seed production recorded the highest seed yield and its components. Seed yield was significantly increased with increasing plant density from 8.400 to 134.400 plant/fed. The interaction between harvesting treatment and genotypes was significant for seed yield in 2010 and 2011 years. El-wadi El-Gadid produced the highest seed yield when cut twice. It also recorded the heaviest seed yield under plant density of 134.400 plant/fed. The second order interaction (El-wadi El-Gadid × cutting twice ×134.400 plant/fed) gave the highest seed yield in both years. Highly significant and negative correlation was observed between seed yield and number of pods /plant (-0.32) and seed index (-0.34).

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“…Racemes per stem was significantly affected by the first incremental increase in between‐row and within‐row spacing treatments but were not significant among the wider between‐row and within‐row spacings. Askarian et al (1995) and Dovrat et al (1969) stated that increases in racemes per stem with decreasing plant densities can be attributed to the production of more primary, secondary, and tertiary shoots. Our study suggests that the 80‐cm between‐row spacing and 30‐cm within‐row spacing are adequate for increasing racemes per stem.…”

Section: Discussionmentioning

confidence: 99%

“…According to Pederson (1957, 1962), plants in thinned stands of alfalfa were several inches shorter, lodged less, and were more accessible to pollinating insects than those in unthinned stands. Recommended between‐row spacings in these studies were quite different and varied from 20 to 91 cm (Abu‐Shakra et al, 1969; Dovrat et al, 1969; Rincker, 1976; Kephart et al, 1992; Askarian et al, 1995; Kowithayakorn and Hill, 1982). Only a few previous studies referred to the effect of within‐row spacing on seed yield (Rincker, 1976; Kowithayakorn and Hill, 1982).…”

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confidence: 99%

Effects of Between‐Row and Within‐Row Spacing on Alfalfa Seed Yields

et al. 2008

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Proper between‐row and within‐row spacing is essential for optimizing alfalfa seed yields and stand longevity. Using three alfalfa (Medicago sativa L.) cultivars (WL232HQ, Derby, and Algonquin), we conducted a field study from 2004 to 2007 to evaluate the effects of three between‐row spacing treatments (60, 80, and 100 cm) and four within‐row spacing treatments (15, 30, 45, and 60 cm) on seed yield, seed yield components, plant height, basal stem diameter, and lodging. Our hypothesis was that the intermediate between‐row and within‐row spacing would gradually improve seed yields in later years. The highest seed yields were obtained with 60‐cm between‐row spacing and 15‐cm within‐row spacing in 2004, but with 80‐cm between‐row spacing and 30‐cm within‐row spacing in 2006 and 2007. The significant year × between‐row spacing and year × within‐row spacing interactions for seed yield indicated that 80‐cm between‐row spacing and 30‐cm within‐row spacing produced the best seed yields as years advanced, and our results confirmed this. With the increase of within‐row spacing, stems per square meter decreased, while racemes per stem increased significantly. The effects of between‐row and within‐row spacing on seeds per pod, however, were not significant in four years. The results suggest that 80‐cm between‐row spacing and 30‐cm within‐row spacing can decrease the risk of lodging and optimize seed yields in the third and fourth harvest years.

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Effect of Plant Spacing on Carbohydrates in Roots and on Components of Seed Yield in Alfalfa ( Medicago sativa L.) ¹

Cited by 13 publications

References 0 publications

Effect of row spacing and sowing rate on seed production of lucerne (Medicago sativaL.) cv. Grasslands Oranga

Effect of row spacing and sowing rate on seed production of lucerne (Medicago sativaL.) cv. Grasslands Oranga

Seed Yield of Two Alfalfa Genotypes Under Different Environments

Effects of Between‐Row and Within‐Row Spacing on Alfalfa Seed Yields

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Effect of Plant Spacing on Carbohydrates in Roots and on Components of Seed Yield in Alfalfa ( Medicago sativa L.) 1

Cited by 13 publications

References 0 publications

Effect of row spacing and sowing rate on seed production of lucerne (Medicago sativaL.) cv. Grasslands Oranga

Effect of row spacing and sowing rate on seed production of lucerne (Medicago sativaL.) cv. Grasslands Oranga

Seed Yield of Two Alfalfa Genotypes Under Different Environments

Effects of Between‐Row and Within‐Row Spacing on Alfalfa Seed Yields

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Product

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Effect of Plant Spacing on Carbohydrates in Roots and on Components of Seed Yield in Alfalfa ( Medicago sativa L.) ¹