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The effects of temperature-modifying treatments during bulb production on the performance of Narcissus bulbs when subsequently forced

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UNSPECIFIED (2004) The effects of temperature-modifying treatments during bulb production on the performance of Narcissus bulbs when subsequently forced. JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY, 79 (4). pp. 669-674. ISSN 1462-0316.

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Abstract

Some attributes of "forced" narcissus bulbs - in particular, the length of cold storage needed to achieve flower cropping within a set time in the glasshouse - vary from year to year. These variations may be due to differences in temperature and other factors experienced by the perennial bulb during the previous years' growth. Bulbs of Narcissus 'Carlton' were grown for one or two years in the field, starting 1995, 1996 and 1997, applying treatments that altered plant temperature: (1) pre-planting storage temperature, (2) date of planting, and (3) use of a straw mulch in the first crop year (either from planting to shoot emergence, or from flower cropping to foliar senescence). Following harvesting, bulbs from each treatment were cold-stored (14-18 weeks at 9degreesC) then grown in an artificially lit forcing room. As expected, there were substantial differences in forced bulb performance between years, between crops grown for one or two years in the field, and due to duration of cold storage. The main effect of treatments imposed during the field phase was due to mulching from cropping until senescence. For bulbs harvested and forced after one year in the field, plots that had been late-mulched produced shorter stems, had a longer period to cropping, a longer cropping period, and a longer vase-life. The effects of mulching interacted with the duration of cold storage, such that late mulching delayed cropping most with a short cold storage period and least with a long period. The effects of other treatments were smaller, as were treatment effects on bulbs grown for two years before forcing. The results suggested that between-years differences in the forcing of narcissus may be due in part to the effects of post-cropping temperatures during bulb production.

Item Type: Journal Article
Subjects: S Agriculture > SB Plant culture
Journal or Publication Title: JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY
Publisher: HEADLEY BROTHERS LTD
ISSN: 1462-0316
Official Date: July 2004
Dates:
DateEvent
July 2004UNSPECIFIED
Volume: 79
Number: 4
Number of Pages: 6
Page Range: pp. 669-674
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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