Seeding Rate and Genotype Effect on Agronomic Performance and End-Use Quality of Winter Wheat

Abstract

Scheromm et al., 1992; Blue et al., 1990;Johnson et al., 1988). Few experiments have studied how seeding rates affect agronomicSeeding rate has long been studied as an integral part performance and end-use quality of modern wheat (Triticum aestivum of wheat production and productivity. Optimal seeding L.) genotypes in the Great Plains. Higher grain yield and better quality rate has been shown to be higher in high rainfall and grain production requires the use of appropriate seeding rates. During irrigated environments (Quisenberry, 1928). Kiesselthe 1997 and 1998 crop seasons, 20 winter wheat genotypes and experibach and Sprague (1926) reported a linear increase in mental lines were evaluated at two locations (four environments) to grain yield as seeding rate increased from 34 to 101 kg assess seeding rate and genotype effects on agronomic performance and end-use quality of wheat. Significant differences among environ-ha Ϫ1 and concluded that a rate of 84 to 101 kg ha Ϫ1 ments, seeding rates, and genotypes, and some of their interactions was most practical for eastern Nebraska. Johnson et al. were identified. Lower seeding rates decreased plant population (by (1965) reported that thinly seeded plots (10, 20, and 40 62.3%), grain yield (by 0.8 Mg ha Ϫ1 ), kernel weight (by 1.3 mg kerkg ha Ϫ1 ), when compared with 81 kg ha Ϫ1 at 30-cm-row nel Ϫ1 ), flour yield (by 0.8 g/100 g grain), mixing time (by 0.7 min), spacing, led to later maturity and more winter killingcaused later flowering (by 2 d), and increased flour protein content in NE. Johnson et al. (1966) with a similar trial grown (by 15 mg g Ϫ1 ) and mixing tolerance (1 unit). Environment ϫ genotype under drought conditions at North Platte found a interactions were significant for all the traits except plant population genotype ϫ seeding rate interaction and the 40 kg ha Ϫ1 and mixing tolerance. On the basis of the four environments, the seeding rate producing the highest yields. Stoltenberg seeding rate ϫ genotype interactions were nonsignificant for all traits (1968), in a 2-yr study using genotypes grown in 30-cm except plant height. These results provide evidence that agronomic rows, recommended seeding rates of 17 to 22 kg ha Ϫ1 performance and end-use quality traits are greatly influenced by the for winter wheat in western NE, 34 to 39 kg ha Ϫ1 rates environmental conditions and less so by seeding rates. Seeding rate in central NE, and no less than 67 kg ha Ϫ1 for eastern affected plant population, days to flowering, plant height, grain yield, NE. Koycu (1968) at Lincoln, NE, reported that 60 kg kernel weight, flour yield, flour protein, and mixing time and tolerance of wheat; therefore, seeding rate should be considered as a factor in Published in Crop Sci

Nitrogen Fertilizer and Seeding Rate Influence on Grain and Forage Yield of Dual‐Purpose Barley

“…A quadratic function effectively described grain yield response to seeding rate (except for CB in dual-purpose system), which is consistent with reports by other researchers (Geleta et al, 2002;Lloveras et al, 2004). In contrast, some other researchers have reported little or no effects of barley seeding rate on yield, especially at rates above 200 seeds m -2 (McKenzie et al, 2005;O'Donovan et al, 2008).…”

Wheat Grain Yield Responses to Seeding Date and Rate Under Rainfed Conditions in Texas

“…In contrast to seeding date and rate responses of winter wheat in northern temperate climates, increasing seeding rate did not compensate for reductions in grain yield for mid-November and later seeding dates in central Texas (4,5,15). Low rainfall during fall or spring periods could have limited responses of grain yield or tiller number to increased seeding rate in the present study (7). In addition, heat unit accumulation during November through February in this sub-humid, warm, temperate climate of central Texas were sufficient to develop over 6 tillers/plant and likely masked compensatory effects of increased seeding rates.…”

“…Increased seeding rate compensated for reduced growing degree day accumulation and for diminished tiller production prior to winter dormancy. Conversely, seeding rate can be reduced to compensate for periods of low rainfall periods under rainfed conditions (7). At low seeding rates, e.g., 120 main seedlings/m², tillering occurred if seasonal rainfall was above normal and nutrients were not limiting, which increased the proportion of yield derived from tillers (5).…”

Seeding Rate Effects on Yield and Yield Components of Bread Wheat Cultivars in the Mid-Atlantic USA

“…Seeding rate has been shown to significantly affect grain yield in both wheat (11,10,8) and barley (14,9). Recommended seeding rates for winter wheat vary by region and class of wheat, usually depending on yield potential and range from 22 to 120 lb seed/acre (3).…”

“…Below optimum wheat seeding rates lower plant population, grain yield, kernel weight, flour yield, and mixing time but increase flour protein content and mixing tolerance (8). Differences due to cultivar have also been shown to affect wheat quality factors including protein characteristics (2).…”