Effect of seeding rate on growth and yield of three spring wheat cultivars

Eight cultivars of spring wheat, Triticum aestivum L., were evaluated at seeding rates of 110, 270 and 430 seeds/m2 in a total of nine experiments spanning three locations, two dates of seeding and 2 yr. Grain yield exhibited a significant cultivar × experiment × linear response to seeding rate interaction. Grain yield of Pitic 62 showed a significant decrease with increased seeding rate in one experiment while giving the greatest increase in another. Over all experiments, the highest seeding rate gave the highest grain yield. For straw yield, Chester showed the greatest response to seed rate, Canuck the least. With the exception of Canuck, which showed a significant increase in harvest index with increased seeding rate, harvest index tended to be greater at the intermediate seeding rate.

Download Full-text

YIELD OF PURE AND MIXED STANDS OF TWO SPRING WHEAT CULTIVARS SOWN AT FIVE RATES OF SEEDING

Canadian Journal of Plant Science ◽

10.4141/cjps77-147 ◽

1977 ◽

Vol 57 (3) ◽

pp. 1005-1007 ◽

Cited By ~ 11

Author(s):

R. J. BAKER

Keyword(s):

Triticum Aestivum ◽

Spring Wheat ◽

Yield Components ◽

Triticum Aestivum L ◽

Pure Stand ◽

Wheat Cultivars ◽

Seeding Rate ◽

Mixed Stands ◽

Yield And Yield Components

Yield and yield components were measured on two spring wheat (Triticum aestivum L. em Thell) cultivars, Neepawa and Pitic 62, and a 1:1 mixture of the two sown at five rates of seeding in each of 2 yr. Lack of agreement between performance in pure and mixed stands was observed when, at the highest seeding rate, the mixture yielded higher in 1974 and lower in 1976 than either of the component cultivars grown in pure stand.

Download Full-text

Growth response of four hard red spring wheat cultivars to date of seeding

Canadian Journal of Plant Science ◽

10.4141/cjps95-012 ◽

1995 ◽

Vol 75 (1) ◽

pp. 75-80 ◽

Cited By ~ 3

Author(s):

P. Hucl

Keyword(s):

Spring Wheat ◽

Growth Analysis ◽

Growth And Yield ◽

Photoperiod Response ◽

Environment Interaction ◽

Wheat Cultivars ◽

Wheat Growth ◽

Area Index ◽

Seeding Date ◽

The Impact

An increasing number of spring wheat cultivars released for production in western Canada are daylength insensitive. In contrast, until a decade ago virtually all Canada Western Red Spring (CWRS) wheat cultivars were daylength sensitive. The impact of photoperiod response on CWRS wheat growth and yield has not been studied to date. A growth analysis study was conducted in each of 3 yr at Saskatoon. Growth and yield traits of the photoperiod-sensitive cultivars Conway and Katepwa and photoperiod-insensitive cultivars Laura and Leader were compared in early versus late plantings. Laura had the highest leaf area index at anthesis and produced more spikelets and kernels per spike than the other cultivars. Laura, however, had a higher tiller mortality, producing fewer spikes per square metre. The cultivars did not respond uniformly to delayed seeding from one year to the next. Significant crossover cultivar × seeding date interaction was detected in each of the 3 yr. The cultivar × seeding-date interactions did not appear to follow a pattern that might be ascribed to differing cultivar photoperiod sensitivity. Conway was involved in one case of significant (P = 0.10) cultivar × seeding cross-over interaction for grain yield, while Katepwa and Leader were each involved in two cases and Laura in three cases. This study failed to determine whether differing photoperiod responses would translate into gross differences in cultivar growth and yield. Thus, there is a need to develop near-isogenic lines to determine whether photoperiod insensitivity is detrimental to yield stability in CWRS wheats. Key words: Canada Western Red Spring wheat, growth analysis, seeding date, genotype × environment interaction

Download Full-text

Seeding Rate Effects on Hybrid Spring Wheat Yield, Yield Components and Quality

Agronomy ◽

10.3390/agronomy11061240 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1240

Author(s):

Peder K. Schmitz ◽

Joel K. Ransom

Keyword(s):

Spring Wheat ◽

Yield Components ◽

Wheat Yield ◽

Triticum Aestivum L ◽

Yield Component ◽

Economic Feasibility ◽

Protein Yield ◽

Seeding Rate ◽

Hard Red Spring Wheat ◽

End Use

Agronomic practices, such as planting date, seeding rate, and genotype, commonly influence hard red spring wheat (HRSW, Triticum aestivum L. emend. Thell.) production. Determining the agronomic optimum seeding rate (AOSR) of newly developed hybrids is needed as they respond to seeding rates differently from inbred cultivars. The objectives of this research were to determine the AOSR of new HRSW hybrids, how seeding rate alters their various yield components, and whether hybrids offer increased end-use quality, compared to conventional cultivars. The performance of two cultivars (inbreds) and five hybrids was evaluated in nine North Dakota environments at five seeding rates in 2019−2020. Responses to seeding rate for yield and protein yield differed among the genotypes. The AOSR ranged from 3.60 to 5.19 million seeds ha−1 and 2.22 to 3.89 million seeds ha−1 for yield and protein yield, respectively. The average AOSR for yield for the hybrids was similar to that of conventional cultivars. However, the maximum protein yield of the hybrids was achieved at 0.50 million seeds ha−1 less than that of the cultivars tested. The yield component that explained the greatest proportion of differences in yield as seeding rates varied was kernels spike−1 (r = 0.17 to 0.43). The end-use quality of the hybrids tested was not superior to that of the conventional cultivars, indicating that yield will likely be the determinant of the economic feasibility of any future released hybrids.

Download Full-text

Effect of Row Spacing and Seeding Rate on Russian Thistle (Salsola tragus) in Spring Barley and Spring Wheat

Plants ◽

10.3390/plants10010126 ◽

2021 ◽

Vol 10 (1) ◽

pp. 126

Author(s):

Judit Barroso ◽

Nicholas G. Genna

Keyword(s):

Seed Production ◽

Crop Yield ◽

Spring Wheat ◽

Plant Biomass ◽

Integrated Management ◽

Spring Barley ◽

Management Strategies ◽

Crop Productivity ◽

Row Spacing ◽

Seeding Rate

Russian thistle (Salsola tragus L.) is a persistent post-harvest issue in the Pacific Northwest (PNW). Farmers need more integrated management strategies to control it. Russian thistle emergence, mortality, plant biomass, seed production, and crop yield were evaluated in spring wheat and spring barley planted in 18- or 36-cm row spacing and seeded at 73 or 140 kg ha−1 in Pendleton and Moro, Oregon, during 2018 and 2019. Russian thistle emergence was lower and mortality was higher in spring barley than in spring wheat. However, little to no effect of row spacing or seeding rate was observed on Russian thistle emergence or mortality. Russian thistle seed production and plant biomass followed crop productivity; higher crop yield produced higher Russian thistle biomass and seed production and lower crop yield produced lower weed biomass and seed production. Crop yield with Russian thistle pressure was improved in 2018 with 18-cm rows or by seeding at 140 kg ha−1 while no effect was observed in 2019. Increasing seeding rates or planting spring crops in narrow rows may be effective at increasing yield in low rainfall years of the PNW, such as in 2018. No effect may be observed in years with higher rainfall than normal, such as in 2019.

Download Full-text

Effects of cereal rye seeding rate on waterhemp (Amaranthus tuberculatus) emergence and soybean growth and yield

Weed Technology ◽

10.1017/wet.2021.28 ◽

2021 ◽

pp. 1-25

Author(s):

Mandy Bish ◽

Brian Dintelmann ◽

Eric Oseland ◽

Jacob Vaughn ◽

Kevin Bradley

Keyword(s):

Crop Production ◽

Production Systems ◽

Soil Seed Bank ◽

Linear Regression Analysis ◽

Growth And Yield ◽

Seeding Rate ◽

Early Season ◽

Cereal Rye ◽

Herbicide Resistant ◽

Growing Seasons

Abstract The evolution of herbicide-resistant weeds has resulted in the necessity to integrate non-chemical control methods with chemicals for effective management in crop production systems. In soybean, control of the pigweed species, particularly herbicide-resistant waterhemp and Palmer amaranth, have become predominant concerns. Cereal rye planted as a winter cover crop can effectively suppress early-season weed emergence in soybean, including waterhemp, when planted at a rate of 123 kg ha−1. The objectives of this study were to determine the effects of different cereal rye seeding rates (0, 34, 56, 79, 110, and 123 kg ha−1) on early-season waterhemp suppression and soybean growth and yield. Soybean was planted into fall-seeded cereal rye, which was terminated within four days of soybean planting. The experiment was conducted over the 2018, 2019, and 2020 growing seasons in Columbia, Missouri. Effects of cereal rye on early-season waterhemp suppression varied by year and were most consistent at 56 kg ha−1 or higher seeding rates. Linear regression analysis of cereal rye biomass, height, or stand at soybean planting showed inverse relationships with waterhemp emergence. No adverse effects to soybean growth or yield were observed at any of the cereal rye seeding rates relative to plots that lacked cereal rye cover. Result differences among the years suggest that the successfulness of cereal rye on suppression of early-season waterhemp emergence is likely influenced by the amount of waterhemp seed present in the soil seed bank.

Download Full-text