The Critical Fall Harvest Period for Alfalfa in Interior British Columbia

Stout, Darryl G.

doi:10.4141/cjps86-076

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…In addition, the detrimental effect of fall harvest may be related to many other factors such as organic reserve level of alfalfa stand, length of fall acclimation period, and soil moisture and soil nutrients in particularly potassium level (Bailey, 1983; Belanger et al., 2006; Biligetu et al., 2014; Smith, 1964). Nevertheless, our findings suggested that avoiding early September harvest was important for preventing yield reduction in the subsequent year in this region regardless of the first killing frost date, partially supporting previous studies (Bélanger et al., 1999; Sheaffler et al., 1986; Stout, 1986). We also found the fall harvest effect was more significant on first cut yield than on regrowth, while regrowth yield was determined more by the date of first cut of a given year.…”

Section: Discussionsupporting

confidence: 90%

“…Kanneganti (1998Kanneganti ( et al (1998 revealed that alfalfa cold hardening initiated at crown temperatures of 15˚C, with maximum hardening rate occurring between 5 and 10˚C and dehardening at temperatures greater than 15˚C, indicating the importance of optimal temperature range for proper cold acclimation. Stout (1986) argued that a critical fall harvest was confounded by having different numbers of cuttings during the fall. For a multiplecut system, Bélanger et al (1999) observed that taking an additional fall cut for alfalfa cultivars with fall dormancy rating of 3-4 decreased winter survival and forage yield in the following year.…”

Section: Discussionmentioning

confidence: 99%

“…(1998) revealed that alfalfa cold hardening initiated at crown temperatures of 15°C, with maximum hardening rate occurring between 5 and 10°C and dehardening at temperatures greater than 15°C, indicating the importance of optimal temperature range for proper cold acclimation. Stout (1986) argued that a critical fall harvest was confounded by having different numbers of cuttings during the fall. For a multiple‐ cut system, Bélanger et al.…”

Section: Discussionmentioning

confidence: 99%

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Effect of fall harvest time on forage yield and nutritive value of three alfalfa cultivars with different root types

Foster,

Vera,

Malhi

et al. 2023

Crop Forage & Turfgrass Mgmt

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Warmer than normal late fall temperatures may change standard fall harvest management of alfalfa (Medicago sativa L.) in western Canada. The objective of this study was to evaluate forage yield and nutritive value of three types of alfalfa cultivars under different harvest managements. A field experiment was conducted from 2013 to 2017 using rhizomatous type (RR), cv. AC Yellowhead (M. sativa subsp. falcata), tap root type (TR), cv. Equinox (subsp. sativa) and creeping root type (CR), cv. Spredor 4 alfalfa (subsp. sativa), at Melfort, SK, Canada. The five harvest treatments were two, 1‐cut systems (Early July or Late July) and three, 2‐cut systems (Early July + Early or Late September, late July + Late September). Total forage yield was greater in TR and CR alfalfa than RR alfalfa, however, RR alfalfa had higher total forage yield under dry growing conditions versus CR alfalfa. The three alfalfa cultivars had a similar response to 2‐cut harvest managements. The first cut yield was affected by the timing of the second cut of the previous year with the early September harvest reducing yield more than the late September. Three alfalfa cultivars had similar CP, TDN, and ADF concentrations. There was a significant nutrient yield benefit of TR and CR alfalfa under 2‐cut system over the RR alfalfa. Although the prairie climate is warming, the findings suggest that a fall rest period until late September is recommended regardless of alfalfa types to maintain high hay yield over multiple years.This article is protected by copyright. All rights reserved

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effect of fall harvest time on forage yield and nutritive value of three alfalfa cultivars with different root types

Foster,

Vera,

Malhi

et al. 2023

Crop Forage & Turfgrass Mgmt

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“…This contrasts with the typical method of waiting for 20-25 cm of growth to occur before rating injury (Heinrichs, Troelsen & Clark, 1960;Stout, 1986). Jones (1928) reported that root discoloration and root softening increased with time after the soil thawed.…”

Section: Discussionmentioning

confidence: 94%

A field method for evaluating frost injury to lucerne

Stout¹,

Hall²,

Brooke³

et al. 1988

J. Agric. Sci.

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S U M M A R YFollowing a winter with low temperatures during a period with no snow cover, lucerne (alfalfa; Medicago sativa L.) plants were dug from the field and various root and crown lesions were identified and rated according to severity. The plants were then put into pots of soil and grown for 6 weeks to determine if they would live or die. The relationship between lesions present at the time of digging and survival was then studied to see if the lesions could be used to predict survival. Injuries to several characteristics were found to be associated with plant death: bud vigour, leaf vigour, resistance of root bark to peeling, resistance of root to squeezing, root interior colour and, depending on site, the presence of fungi on the root surface. A model combining injury ratings for three characteristics (bud vigour, root colour, and root resistance to peeling) was developed and survival probabilities based on this model are presented. Use of this model will allow for an early evaluation of low-temperature injury without having to wait for aerial growth to occur.

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