บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The impact of Ca treatment on the yield and storage quality of carrots

Buike I., Alsina I.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.57

2004

บทคัดย่อ

The impact of Ca treatment on the yield and storage quality of carrots Carrots are o­ne of the broadest grown vegetables for winter consumption in Latvia therefore the storage problems are actual.Optimal content of Ca2+ in the soil is o­ne of the most important factors influenced the yield and quality.Also storage facilities deteriorate in the case of calcium lack.

Investigation o­n the impact of Ca top-dressing fertilisers o­n the carrot yield, quality and storage properties in Latvia conditions were carried out in the Pure Horticultural Research Station from 1999 to 2002.Two varieties (‘Narbone’ F1 and ‘Newburg’ F1) were investigated.Dressing was done in four variants: all dose of calcium nitrate (Ca(NO3)2) applied o­nce or divided in two and three times per vegetation period, as well as control variant (dressing by ammonium nitrate (NH4NO3)) was included.Carrots were stored from October till April in the storage room at +1…2 °C, relative humidity 95-97%.The highest yield was obtained in the variant with three-times divided top-dressing.Nevertheless highest quality roots were harvested in the variant of twice divided top-dressing.The highest 1st grade yield was obtained in all variants with Ca top-dressing in comparison to control.Root mass changes were influenced by the time of top-dressing, Ca treatment and length of the storage period.In total the less mass losses for the period from October till April were observed for the variant with twice-divided Ca treatment.The studies of dry matter content showed significant influence of Ca treatment, but dressing time had no influence.The highest sugar content in the carrots at the moment of harvest was measured in the control variant and variant with o­nce-divided Ca top-dressing.Nevertheless influence of o­ne concrete factor o­n the sugar content changes in carrots during the storage period was not stated.