Precooling, Planting Depth, and Shade Affect Cut Flower Quality and Perennialization of Field-grown Spring Bulbs

Cavins, Todd J.; Dole, John M.

doi:10.21273/hortsci.37.1.79

Cited by 7 publications

(4 citation statements)

References 6 publications

(11 reference statements)

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“…For this reason, it seems that P. anomala, P. intermedia and P. veitchii were more adaptable to low light intensity than 'Da Fugui'. A decrease in size and branch number and an increase in stem length occurred in Kalmia latifolia (Brand, 1997), Narcissus and Tulipa (Cavins & Dole, 2002) in response to shade, but these phenomena were not observed in this study. Combined with the increase in leaf area, these results suggest that the wild Paeonia species used in this study exhibit different morphological responses to shade.…”

Section: Discussioncontrasting

confidence: 80%

Shade effects on growth, photosynthesis and chlorophyll fluorescence parameters of three Paeonia species

Wan

Zhang

et al. 2020

PeerJ

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Insufficient light intensity inhibits the growth of cultivated herbaceous peony and decreases its economic value. Owing to the increased demand for shade-tolerant herbaceous peony, the selection of appropriate parents for hybridization is essential. Paeonia anomala, Paeonia intermedia and Paeonia veitchii can grow under shade conditions in their natural habitats; however, their photosynthetic capacities under shade have not been studied. In this study, we simulated low light intensity (30% sunlight) and evaluated the morphological, photosynthetic and chlorophyll fluorescence parameters of these three species. Moreover, the shade tolerance of these species as well as two common cultivars (Paeonia lactiflora ‘Da Fugui’, which is suitable for solar greenhouse cultivation, and P. lactiflora ‘Qiao Ling’, which is not suitable for solar greenhouse cultivation) was evaluated. The results showed that under shade, the leaf area of P. anomala and P. intermedia increased, the single flowering period of P. intermedia and P. veitchii was prolonged, and the flower color of P. veitchii faded. With respect to P. anomala, P. intermedia and P. veitchii, shade eliminated the photosynthetic ‘lunch break’ phenomenon and decreased photoinhibition at midday. Furthermore, the maximum photochemical efficiency (Fv/Fm) and maximum primary photochemical yield (Fv/Fo) of photosystem II (PSII) in the three species improved significantly, and their changes in light dissipation were different. The shade tolerance of the tested accessions was in the order P. veitchii > P. intermedia > P. anomala > ‘Da Fugui’ > ‘Qiao Ling’, showing that the three wild species were better adapted to low light intensity than the cultivars. Thus, P. anomala, P. intermedia and P. veitchii could potentially be used in the development of shade-tolerant herbaceous peony cultivars.

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Section: Discussioncontrasting

confidence: 80%

Shade effects on growth, photosynthesis and chlorophyll fluorescence parameters of three Paeonia species

Wan

Zhang

et al. 2020

PeerJ

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“…Data presented in (Table3) explained that shading had a significant effect to increase days for flowering. Similar results were also obtained by Cavins and Dole (2002) on narcissus and tulip. Interaction between planting dates and shading on number of days for flowering had a significant effect (Table 4), where the maximum number of days was in planting on 1 st Oct. irrespective of shading while the minimum was when planting on 1 st Feb. in full sun.…”

Section: Days For Floweringsupporting

confidence: 88%

“…Plant height was influenced noticeably by shading, maximum of plant height (45cm) was recorded with those growing under 50% shade and the minimum (34.38cm) resulted from those growing in full sun (Table3). The same results were reported by Cavins and Dole (2002) on Narcissus and Tulip, and Mayoli and Isutsa (2012) on Ranunculus. Reduction of plant height in a full sun condition where light intensity ranges between 80- 90 k lux could be explained by the fact that leaves normally supply a gibberellin precursor to the stem and high light blocks the precursor's conversion to active gibberellins (Armitage, 1991).…”

Section: Plant Heightsupporting

confidence: 88%

EFFECT OF PLANTING DATES, BULB SIZES AND SHADING LEVELS ON THE GROWTH AND FLOWERING OF Iris hollandica

Alsheikly

2014

Egyptian Journal of Agricultural Sciences

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The objective of the experiment was to study the effects of five planting dates (1 st Oct., 1 st Nov. 1 st Dec., 1 st Jan., and 1 st Feb.), three bulb sizes (5-6, 6-7 and 7-8 cm) and two levels of shading (0 and 50%) on the growth and flowering of Iris hollandica cv. Prof. Blaauw. The studied parameters included days for flowering, plant height, flower diameter, flowering stem diameter, flowering stem fresh weight, vase life and the fresh weight of bulbs and bulblets.Planting dates and bulb sizes showed significant differences in all the studied parameters. Shading resulted significant differences with all studied parameters except flowering stem diameter and vase life. The interaction between planting dates and shading had significant differences in all the studied parameters, while the interaction between bulb size and shading level had significant differences with flower diameter, flowering stem diameter and fresh weight of the new bulbs. The best characteristics were obtained by early planting (1 st Oct. and1 st Nov.) of larger bulbs(7-8 cm) under 50% shade.

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“…Soil temperature decreased with depth during the summer, although to a lower degree than expected. Cavins and Dole (2002) reported much greater differences in temperatures between 15 and 30 cm on raised field beds as soon as the soil warmed in late spring. We suspect that the narrow width (about 1.65 m wide) of the raised beds in the current study strongly increased heat exchange with the air, reducing the difference between depths compared with flat planting conditions.…”

Section: Impact Of Corm Depth On Saffron Yield and Corm Growthmentioning

confidence: 93%

Cultivation of Saffron (Crocus sativusL.) in cold climates

et al. 2022

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Saffron, an autumn crocus that produces a highly valuable spice, is grown mainly under Mediterranean climates. Nevertheless, saffron farms have been established recently in the province of Quebec. This led us to test cultivation practices that could influence plant phenology, saffron yield and corm growth, including planting depth, planting period, and the application of fertilizers, mycorrhizal fungi and biostimulants at planting. Soil temperature was monitored at the different planting depths throughout the year. Floral initiation was also monitored during spring and summer. Shoot emergence was delayed and final emergence reduced as planting depth increased. However, more shoots were produced buy shallow planted corms, which could lead to the production of corms too small to flower. The best time for planting saffron corm is between the end of July and the third week of August. Mineral fertilization hastened leaf emergence and improved corm production and their nutrient content. Neither the addition of mycorrhizal fungi or of biostimulants had any significant impact on saffron growth or flowering. Floral induction likely took place in July as flower bud appeared in early August. In most years, flower and saffron production was low in this location. It appears that soil temperature did not remain high for long enough during the summer to promote floral induction and autumn temperatures decreased too fast, limiting shoot and flower emergence most years. However, these climatic conditions did not affect corm production; corms could thus be sold to secure revenues for producers.

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Precooling, Planting Depth, and Shade Affect Cut Flower Quality and Perennialization of Field-grown Spring Bulbs

Cited by 7 publications

References 6 publications

Shade effects on growth, photosynthesis and chlorophyll fluorescence parameters of three Paeonia species

Shade effects on growth, photosynthesis and chlorophyll fluorescence parameters of three Paeonia species

EFFECT OF PLANTING DATES, BULB SIZES AND SHADING LEVELS ON THE GROWTH AND FLOWERING OF Iris hollandica

Cultivation of Saffron (Crocus sativusL.) in cold climates

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