AC Blue J alfalfa

Acharya, S. N.; Huang, Hung‐Chang; Hanna, M. R.

doi:10.4141/cjps95-081

Cited by 13 publications

(10 citation statements)

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“…Pastures established on 19 June 2008 for a grazing study were used for the purpose. The two mixed pasture treatments consisted of the cultivar Nova sainfoin (Hanna, 1980), presently used as check cultivar in western Canada, and a newly developed population LRC‐3519 with a high yielding AC Blue J (ABJ) alfalfa (Acharya et al, 1995). LRC‐3519 was developed at LRC using selections based on enhanced ability to regrow in a multiple cut system and persistence in mixed alfalfa stands under irrigated growing conditions.…”

Section: Methodsmentioning

confidence: 99%

Alfalfa Pasture Bloat Can Be Eliminated by Intermixing with Newly‐Developed Sainfoin Population

et al. 2014

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Pasture bloat is a major deterrent to the grazing of alfalfa (Medicago sativa L.) pastures by ruminants, despite the high growth rates that are obtainable. Sainfoin (Onobrychis viciifolia Scop.), a condensed tannin-containing legume, is known to reduce alfalfa pasture bloat in mixed stands. Experiments were conducted in 2010 to 2012 at Lethbridge, AB, using two sainfoin/cultivar AC Blue J alfalfa mixed pastures originally seeded as 50:50 mixes in 2008 and rotationally grazed by steers (Bos taurus). New sainfoin population cultivar LRC-3519 specifically selected for improved performance under a multi-cut system, persisted better (29% of total herbage dry matter [DM]) compared to cultivar Nova (5%) after two cycles of rotational grazing in each year. Bloat incidence and severity in steers were reduced (P < 0.001) by 98% in LRC-3519 mixed stands compared to Nova mixtures when Angus steers grazed sainfoin/alfalfa mixed pastures under conditions for maximizing bloat occurrence. In a separate crop preference study during 2011-2012, eight steers were randomly paired and assigned to four alfalfa and sainfoin strip pastures to determine DM utilization and time spent grazing the two forages. Steers spent more time (55%) in alfalfa strips compared to sainfoin and grazed more (P < 0.05) alfalfa (2048 kg DM) than sainfoin (1164 kg DM). In spite of higher preference for alfalfa, a high proportion of new sainfoin in mixed alfalfa stands reduced risk of bloat substantially in cattle grazing mixed alfalfa/sainfoin pasture.

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Section: Methodsmentioning

confidence: 99%

Alfalfa Pasture Bloat Can Be Eliminated by Intermixing with Newly‐Developed Sainfoin Population

et al. 2014

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“…AC Blue J yielded about 16% more total biomass than Beaver over all years in experiments conducted at Lethbridge and Creston. In two previous 7-yr trials on irrigated locations at Lethbridge, AC Blue J yielded about 15% more than Beaver (Acharya et al 1995). Therefore, AC Blue J selected under irrigated conditions in southern Alberta (adaptation and disease resistance) consistently produced greater yields in this area and in southern British Columbia.…”

Section: Effect Of Herbicides and Cultivars On Alfalfa And Total (Alfmentioning

confidence: 95%

“…In cultivar trials in western Canada, Beaver is the check cultivar for standard alfalfa types and AC Blue J is the check for Flemish types. In a 7-yr alfalfa cultivar trial under irrigated conditions in southern Alberta, AC Blue J had 50% less weed biomass than Beaver (Acharya et al 1995). The greater ability of AC Blue J than Beaver to compete with weeds is likely due to its more rapid growth following cutting, and extensive tiller formation that results in rapid and more complete ground cover.…”

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confidence: 99%

Impact of cultivars and herbicides on weed management in alfalfa

Moyer¹,

Acharya²

2006

Can. J. Plant Sci.

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. 2006. Impact of cultivars and herbicides on weed management in alfalfa. Can. J. Plant Sci. 86: 875-885. Weeds, especially dandelion (Taraxacum officinale Weber in F.H. Wigg.), tend to infest a forage alfalfa (Medicago sativa L.) stand 2 to 4 yr after establishment. To develop better weed management systems, experiments were conducted at Lethbridge, Alberta, from 1995 to 2002 and Creston, British Columbia, from 1998 to 2001, which included the alfalfa cultivars Beaver (standard type) and AC Blue J (Flemish type) and annual applications of metribuzin and hexazinone. These herbicides are registered for weed control in irrigated alfalfa in Alberta and alfalfa grown for seed. In addition, two sulfonylurea herbicides, metsulfuron and sulfosulfuron, and glyphosate were included. All of the herbicides except glyphosate controlled or suppressed dandelion and mustard family weeds. Metsulfuron at 5 g a.i. ha -1 almost completely controlled dandelion at both locations. However, after metsulfuron application at Lethbridge, dandelion was replaced with an infestation of downy brome, which is unpalatable for cattle. None of the herbicides increased total forage (alfalfa + weed) yield, and in some instances herbicides reduced forage quality by causing a shift from a palatable to an unpalatable weed species. However, it was observed that AC Blue J consistently yielded more than Beaver, and weed biomass was consistently less in the higher-yielding cultivar. AC Blue J was developed primarily for the irrigated area in southern Alberta and for southern British Columbia. Therefore, additional experiments should be conducted to determine which alfalfa cultivars have the greatest ability to compete with weeds in other regions of western Canada. Les deux herbicides testés sont homologués pour la lutte contre les mauvaises herbes dans les cultures irriguées de luzerne en Alberta et dans celles de luzerne destinées à la production grainière. Les essais portaient aussi sur deux herbicides à base de sulfonylurée, le metsulfuron et le sulfosulfuron, et sur le glyphosate. Tous les herbicides à l'exception du glyphosate combattent ou détruisent le pissenlit et les adventices de la famille de la moutarde. À 5 g de matière active par hectare, le metsulfuron est presque entièrement venu à bout du pissenlit aux deux endroits. Toutefois, après l'application de metsulfuron à Lethbridge, une infestation de brome des toits, espèce incomestible pour les bovins, a remplacé celle de pissenlit. Aucun herbicide n'accroît la quantité globale de fourrage (luzerne + mauvaises herbes); dans certains cas, ils réduisent même la qualité du fourrage avec la substitution des espèces comestibles par d'autres, incomestibles. Toutefois, les auteurs ont remarqué que la variété AC Blue J donne toujours un rendement supérieur à la variété Beaver et que la biomasse des adventices est constamment plus faible avec le premier cultivar. La variété AC Blue J a principalement été créée pour les régions irriguées du sud de l'Alberta et du sud de la ColombieBritannique. Par cons...

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“…High-yielding alfalfa cultivars adapted for dryland (Rangelander, Heinrichs et al 1958;and Rambler, Heinrichs et al 1979) and irrigated (Blue J, Acharya et al 1995;and Longview, Acharya and Huang 2000) conditions were seeded in 2010 on both experimental sites. The crops were seeded with a custom built 10 row small plot forage seeder at a rate of 10 kg ha −1 , with 0.2 m row spacing and at a depth of about 0.019 m. A neutron probe access tube was inserted in the middle of each plot to measure soil water content.…”

Section: Experimental Locations and Cultural Practicesmentioning

confidence: 99%

Yield and net return from alfalfa cultivars under irrigation in Southern Alberta

et al. 2016

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Field studies with two types of alfalfa (Medicago sativa L.) cultivars were conducted at Lethbridge in 2012 and 2013 and at Picture Butte in 2012 to determine the effects of irrigation on the dry matter (DM) yield and on net returns. The irrigated cultivars (Longview and Blue J) and dryland cultivars (Rangelander and Rambler) were arranged on plots in a randomized complete block design with four irrigation treatments and replicated five times. For the optimal irrigation treatment (W 1 ), soil water content was maintained between 60 and 90% of available water in the designated root zone. Other irrigation treatments received 75% (W 2 ), 50% (W 3 ), and 25% (W 4 ) of the irrigation water applied to the optimal treatment. The mean DM yields of irrigated alfalfa cultivars were greater than one of the dryland cultivars in both locations. The mean total DM yields for W 2 and W 3 at Lethbridge for Blue J, Longview and Rambler were greater than those of W 1 , although the differences were not always significant. The net returns, calculated by using the same price for all alfalfa harvests were similar across the cultivars and irrigation treatments excepting Rangelander, where the returns were lower. The results obtained from this study indicated a trend towards comparable yields and net returns between the optimal and the 75% irrigation treatment with 40% depletion of available water at the root zone, for the irrigated alfalfa cultivars and a dryland type Rambler.

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AC Blue J alfalfa

Abstract: wilt and bacterial wilt resistant cultivar outyielded Beaver by about 8% in 4-yr trials and l5% n7-yr trials in west€rn Canada.It is well suited for hay production, dehydration, and silage in arcas where verticillium wilt rcduces alfalfa yield and stand life.

Cited by 13 publications

References 0 publications

Alfalfa Pasture Bloat Can Be Eliminated by Intermixing with Newly‐Developed Sainfoin Population

Alfalfa Pasture Bloat Can Be Eliminated by Intermixing with Newly‐Developed Sainfoin Population

Impact of cultivars and herbicides on weed management in alfalfa

Yield and net return from alfalfa cultivars under irrigation in Southern Alberta

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