Influence of Duration of Growth, Seed Size, and Seeding Depth on Cold Hardiness of Two Hardy Winter Wheat Cultivars

. 1994. Date and rate of seeding of winter cereals in central Alberta. Winter survival is often the most limiting factor for the use of winter cereals for grain production in the Black soil zones of the Canadian prairies. Production practicei that optimize winter survival are an important part of extending the winter cereal acreage in this area. In this study^, thiee dates of fall seeding (late August, 99!y Sepleg!e1,^9nd late September) at two rates of seed'ing (258 and 328 seeds r =t; *.r. investigated in 1988-1989, 1989-1990, and 199l-1992, at Lacombe, Alberta en 1988-1989, 1989-1990et 1991-1992 Le semis pr6coce appoft;ii, en outre, on giin de pi6cocit6 en 1989 et en 1992, soit 1 )r 13 j par rapport au semis tardif. Le poids sp6cifique et ie poids du grain 6taieit plus bas de l0 i 116 kg m-3 et de I ir 3,4 mg respectivement )r la suite du semis iutOii. fr.oni"nu pro€ique du giain 6tait g6ndralement indiff6rent aux traitements, bien qu'il soit plus 6lev6 dans certaines cultures sem6es tard (0,2 a 1,0 s iOO t--tr. Le tauide semis 6tait sans effet sur la plupart des caractdres 6tudi6s, sauf le rendement grainier en l992et le'poids du g"rain ei lgg} et lgg2, alors que les effets variaient d'une date de semis ir I'autre. La date de semis n'influait pas sur la hauteur des [lunt.r, saufen 1992, alors que les cultures sem6es tard 6taient plus courtes. Ind6pendamment du cultivar' ie degr6 de survie 6tait abaiss6 par le semis tardii, accroissant ainsi les risques de production. La p6riode la plus propice-au semiJdes c6r6ales d'hiver dansie centre de l'Alberta est plus longue si on utilise des cultivars rustiques, de sorte que si I'on doit semer tard, c'est ces cultivars qu'il faut employer.Mots cl6s: Triticale d'hiver, bl6 d'hiver, seigle d'automne, rendement, survie )r I'hiver Traditionally, winter cereal production on the Canadian snow. Taylor and Olsen (1985) found that the crown-depth prairies has'been confined to the dark-brown soil zones of temperature critical for winter survival in well-hardened southern Alberta. However, Savdie et al. (1991) demon-winter wheats was -20oC and in less-hardened wheats, strated that the risk of winterkill in the black soil zone of -16oC, although these values will change throughout the central Alberta, Saskatchewan and Manitoba, and the grey-winter. Gaudet et al. (1989) identihed cottony snow mould woode.d soil zone of northern Alberta was similar to *re tradi-(Coprinus psychromorbidas Redhead and Traquair) as the tional production area of southern Alberta, if snowfall could major disease influencing winter survival and subsequent be retained on the field. Good winter hardiness of the cul-production in central and northern Alberta. Production practivars sown in these areas is essential for successful over-tices will affect winter survival and subsequent grain yields. wintering. Fowler (1979) found that winter survival of winter Freyman (1978) reported that cold hardiness of winter wheat cereals J'epended upon avoidance of low temperatures and was best for large seeds plante...

mentioning

confidence: 99%

“…wintering. Fowler (1979) found that winter survival of winter Freyman (1978) Salmon et al (1993) found that early and frequent clipping of spring seeded winter cereals could improve their winter survival and subsequent grain yields compared to spring seeded cultivars that were not clipped for forage or were clipped less frequently.…”

mentioning

confidence: 99%

Date and rate of seeding of winter cereals in central Alberta

Jedel¹,

Salmon²

1994

“…Similarly, the rewarming rate was slower in moist soil compared to dry soil, being respectively 2.0 and 2.5'C/h. Parsons and Li (1978) with dogwoJd (Cornus stolonifera), of Willemot and Pelletier (1979) with whear, of Wilson (1976) (Smith 1952 Willemot et al (1977) , Freyman ( 1978) and with rye and wheat by Fowler and Gusta (1977).…”

mentioning

confidence: 99%

Influence of Soil Moisture on Cold Tolerance of Alfalfa

Paquin¹,

Mehuys²

1980

“…Only the hardiest cultivars can be grown successfully in certain regions, and cultural practices that reduce the risk of winter-kill must be followed. A number of these practices have been identified (Grant et al 1974Freyman 1978 whereas the effect of others, such as fall application of herbicides, has not been documented. (Moreland 1967;CAST 1975).…”

mentioning

confidence: 99%

“…These processes are also Can. J. Plsnt (Jan. 1979) 237 governed by natural growth hormones that affect cold hardiness (Dolnicki 1969 (Freyman 1978 temperatures, -8, -lO, -12, -14, and -I 6'C, and also placed in a greenhouse for a 21-day recovery period. At the end of the recovery period, one representative replicate of the trays was moved directly from the growth cabinet to the greenhouse and one representative replicate of the trays frozen to -14"C was photographed (Fig.…”

mentioning

confidence: 99%

Effect of Phenoxy Herbicides on Cold Hardiness of Winter Wheat

Freyman¹,

Hamman²

1979

Self Cite

In a controlled environment experiment, five phenoxy herbicides were sprayed at two rates on 14-day-old winter wheat (Triticum aestivum L. emend Thell ’Norstar’). After 7 additional days of active growth, the plants were cold-hardened for 14 days and then subjected to a freezing test. Four of the herbicides — MCPA amine, 2,4-D ester, 2,4-DB, 2,4-D amine — significantly reduced the cold hardiness of winter wheat whereas diclofop methyl had a minor effect. The reduction in hardiness was greater at the higher rates of application than at the lower rates.