Effect of Plant Spacing on the Development of Winter Wheat<sup>1</sup>

Wilson, James A.; Swanson, A. F.

doi:10.2134/agronj1962.00021962005400040015x

Cited by 9 publications

(12 citation statements)

References 1 publication

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“…The hypothesis (Sharma and Smith, 1987;Budak et al, 1995) of having tall plants less responsive to SR than semi-dwarf has not been observed in our results, where different heights do not require different SRs (Table 3). The curvilinear response between SR and days to maturity found in previous studies Wilson and Swanson (1962), Johnson et al (1966), and Faris and DePauw (1980) have also been observed in our experiment, where days to maturity generally decreased as SR increased (Table 3, Fig. 2).…”

Section: Agronomic Traitssupporting

confidence: 90%

Effects of Seeding Rate on Durum Crop Production and Physiological Responses

et al. 2017

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Core Ideas Optimum seeding rate on elite durum wheat depends on environment. Seeding rate had a significant positive relationship with grain yield, leaf area index, and carbon isotope discrimination. Seeding rate should be adjusted for environment and genotype for maximum yield. Seeding rate can be manipulated to optimize the ability of the crop to capture available resources and therefore increase yield. Seeding rate may vary between regions according to the climate conditions, soil type, sowing time, and other agronomic practices. Insufficient information is available for optimum seeding rate on durum wheat (Triticum turgidum L. var durum) for some production zones, and response to seeding rate is unknown for recently registered durum cultivars in Canada. The objective of this study was to determine the effect of seeding rate (SR) on performance of Canada Western Amber Durum wheat cultivars and study the underlying physiological response to a wide range of SRs. Eight durum wheat cultivars were sown at densities of 163, 217, 272, 326, and 380 seeds m−2 to study the effect of SR on several agronomic and physiological traits. Each experiment was planted as a factorial randomized complete block design with three replications near Swift Current and Regina in 2010 and 2011. High genetic and environmental response to SR was observed between cultivars. The results showed an increase in grain yield as the SR increased. The optimum SR for cultivars grown at Swift Current and Regina was 272 to 326 seeds m−2 and 217 to 272 seeds m−2. Grain yield showed a positive relationship with carbon isotope discrimination (CID) and leaf area index (LAI). In turn, LAI showed a linear increase with SR. Information generated from this study could enable producers to maximize crop grain profitability by optimizing plant density.

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Section: Agronomic Traitssupporting

confidence: 90%

Effects of Seeding Rate on Durum Crop Production and Physiological Responses

et al. 2017

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“…The number of seeds per head has been shown to increase as plant density is decreased or as the number of heads per square foot is decreased (1,5,6,35,41), Test weight was fo\ind to increase with increased plant population by Wilson and Swanson (44). Kinra et al (20) reported test weight to increase slightly with higher seeding rates in two tests while there were no significant differences in two other tests.…”

Section: Literature Review Seeding Ratementioning

confidence: 99%

“…Wilson and Swanson (44) found that lowering the plant population below fifteen plants per square foot resulted in a significant reduction in yield per acre.…”

Section: Literature Review Seeding Ratementioning

confidence: 99%

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Response of Certain Winter Wheat Varieties to Stand Density

Stickler¹,

Ahmed²,

Mabry³

1964

Transactions of the Kansas Academy of Science (1903-)

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“…Climatic conditions and, especially, rainfall distribution during the growing season were found to modify the response of plants to different spacings. For instance, high seed rates were found to increase yield in well watered conditions, whereas the reverse was true with low soil moisture (Wilson and Swanson, 1962;Blue et al, 1990;Tompkins et al, 1991a,b).…”

Section: Introductionmentioning

confidence: 99%

Grain yield, and dry matter and nitrogen accumulation and remobilization in durum wheat as affected by variety and seeding rate

Arduini¹,

Masoni²,

Ercoli

et al. 2006

European Journal of Agronomy

232

148

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The influence of crop density on the remobilization of dry matter and nitrogen from vegetative plant parts to the developing grain, was investigated in the durum wheat (Triticum durum Desf.) varieties Creso, Simeto and Svevo cultivated in the field at three seeding rates, 200, 250 and 400 seeds m−2. Variety × seeding rate interaction was unsignificant for all recorded characters. Grain yield declined in the order Svevo > Simeto > Creso. Yield differences mainly depended on the different number of kernels per unit land and, secondly, on mean kernel weight. Spike components differed among varieties: Svevo and Simeto showed more kernels per spikelet and Creso more spikelets per spike. Grain yield was highest with 400 seeds m−2 primarily due to the higher number of spikes per unit area, and secondly, to the higher mean kernel weight. Post-heading dry matter accumulation was highest in Svevo and lowest in Creso, but varieties showed a reverse order for dry matter remobilization and contribution of dry matter remobilization to grain yield. The increase of seeding rate increased both the post-heading dry matter accumulation and the dry matter remobilization from vegetative plant parts to grain. Nitrogen uptake of the whole crop and N content of grain was higher in Simeto and Svevo than in Creso. The N concentration of grain did not vary among varieties, but Svevo showed a markedly lower N concentration and N content of culms at maturity, which may be consequence of the high N remobilization efficiency performed by this variety. The N uptake by the crop was highest with 400 seeds m−2, but the N concentration of culms, leaves and even grain was slightly lower than with the lower seed rates. The post-heading N accumulation was by far higher in Simeto and Svevo than in Creso, whereas remobilization was highest in Svevo and lowest in Simeto. The percentage contribution of N remobilization to grain N was by far higher in Creso than in the other two varieties. Post-heading N accumulation and N remobilization were highest with the highest plant density, but the contribution of N remobilization to N grain content did not differ between seeding rates

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Effect of Plant Spacing on the Development of Winter Wheat¹

Cited by 9 publications

References 1 publication

Effects of Seeding Rate on Durum Crop Production and Physiological Responses

Effects of Seeding Rate on Durum Crop Production and Physiological Responses

Response of Certain Winter Wheat Varieties to Stand Density

Grain yield, and dry matter and nitrogen accumulation and remobilization in durum wheat as affected by variety and seeding rate

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Effect of Plant Spacing on the Development of Winter Wheat1

Cited by 9 publications

References 1 publication

Effects of Seeding Rate on Durum Crop Production and Physiological Responses

Effects of Seeding Rate on Durum Crop Production and Physiological Responses

Response of Certain Winter Wheat Varieties to Stand Density

Grain yield, and dry matter and nitrogen accumulation and remobilization in durum wheat as affected by variety and seeding rate

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Product

Resources

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Effect of Plant Spacing on the Development of Winter Wheat¹