The Influence of CCC Applications on Chinese Cabbage (Brassica Campestris L. SPP Pekinensis (Lour.) Rupr.) Tipburn Incidence

Maroto, J.V.; López-Galarza, Salvador; Pascual, B.; Alagarda, J.; Bautista, A. San; Bardisi, A.; Rubio, Michael

doi:10.17660/actahortic.1996.407.42

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“…The causes of this disorder are varied, though a lack of available calcium (Ca) in the affected tissues is the most common factor (Shear 1975;Kuoetal. 1981;Collier 1982;Stratton & Nagata 1994;Maroto et al 1996;Saure 1998). The translocation of this ion, mainly through the xylem, depends on transpiration.…”

Section: Introductionmentioning

confidence: 99%

“…Tipburn incidence is more severe when environmental conditions induce high growth rates (Borkowski & Szwonek 1994;Gaudreau et al 1994;Stratton & Nagata 1994;Balvoll 1995), necessitating a greater Ca flow. As a prevention for this problem, growth regulators have been tested, such as paclobutrazol in lettuce (Obispo 1997) or chlormequat (Maroto et al 1996) and daminozide (Aloni 1986) in Chinese cabbage, although results have proven inconsistent (Saure 1998). Nitrogenous fertilisers, mainly in the form of ammonium, promote the development of this physiopathy (Collier 1982;Brumm et al 1993), as does irrigation water with high electrical conductivity (Hochmuth et al 1993;Pascale & Barvieri 1995;Miao et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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Row covers for quality improvement of Chinese cabbage(Brassica rapasubsp.Pekinensis)

Hernández¹,

Soriano²,

Morales³

et al. 2004

New Zealand Journal of Crop and Horticultural Science

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Row covers of polypropylene sheeting have been studied in relation to the quality in Chinese cabbage (Brassica rapa subsp. Pekinensis 'Nagaoka 50') for 3 years (1999, 2000, and 2001) in the area of Granada, Spain, under a Mediterranean continental temperate climate, on 55-day cycles with transplanting in mid March. The mean commercial yield for the 3 years was 11.9 kg m -2 under row covers, but only 2.1 kg m -2 in open air, owing primarily to the important number of non-commercial cabbages. The cabbages grown in the open air were exposed to lower temperatures than under covers and showed a higher number of plants with bolting and plants lost in the field. The better thermal regime under the covers and the least vapour pressure deficit favoured heading, reducing the number of malformed cabbages. The foliar calcium (Ca) content in the outer leaves was significantly greater in the open air than under the row cover, whereas the reverse was true in the inner leaves. These lower Ca contents in the inner leaves of the open air plants, encouraged tipburn. The use of the row cover constitutes a lowcost technique to improve open air spring cultivation of this leafy vegetable in this type of Mediterranean continental climate.

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Section: Introductionmentioning

confidence: 99%