Mineral composition of 'Conference' pears as affected by different foliar sprays

• Autorzy: Gastol M , Domagala-Swiatkiewicz I
• Języki publikacji: EN

Abstrakty

EN

The aim of our two-year study (2004-05) was to assess the effects of different foliar fertilizers (calcium chloride, Kalcisal, Kalcisal+Kalcifos and Sanisal) on fruit mineral content. The paper also presents the distribution of some macronutrients (N, K, Mg and Ca) in different parts of ‘Conference’ pears. The treatments consisted of five foliar sprays (at the rate of 0.17% Ca) in two week intervals followed by five (at the rate of 0.35% Ca) in one-week intervals. After 120 days of storage, fruits from the treatments were divided into: peel, calyx end, basal end, and outer part of flesh. Each of them was analyzed to assess the contents of nitrogen, potassium, magnesium and calcium. The mineral content of investigated fruits was strongly affected by fertilizers used as well as by the season. Fruits from non-treated trees contained the lowest amounts of macronutrients (average data of four fruit parts). The higher amounts of potassium, magnesium and calcium was found in 2004. In 2004 the highest concentration of calcium was proved for fruits sprayed with Kalcisal (125.5 mg Ca kg⁻¹ f.w.), and in 2005 for calcium chloride (101.3 mg kg⁻¹ f.w.). The K/Ca ratio varied from 16 to 35 and 21 to 35 for 2004 and 2005, respectively. As far as K/Ca ratio is concerned, no significant differences between pears sprayed with CaCl₂ or Kalcisal in comparison to control was found. On the contrary, in both years of the study, the higher K/Ca ratio for Kalcisal+Kalcifos and Sanisal treatments was noted. Sanisal and Kalcisal+Kalcifos significantly increased N/Ca fruit ratio in 2005, as well as Mg/Ca ratio in all seasons. An analysis of average data for all treatments revealed the highest concentration of investigated macroelements in the peel of fruits. The lowest calcium accumulation was recorded in samples taken near the calyx, and in the outer part of the flesh. The lowest N/Ca, K/Ca and Mg/Ca fruit ratios were investigated for peel, whereas the highest – near the calyx end.

Słowa kluczowe

EN

pear; plant cultivar; Conference cultivar; mineral composition; fruit; mineral nutrition; foliar fertilizer; calcium

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2009
• Tom: 18
• Numer: 4
• Opis fizyczny: p.741-744,ref.

Twórcy

autor

Gastol M

• Department of Pomology and Apiculture, Agricultural University, Al.29 Listopada 54, 31-425 Krakow, Poland

autor

Domagala-Swiatkiewicz I

• Department of Soil Cultivation and Fertilization, Agricultural University, Al.29 Listopada 54, 31-425 Krakow, Poland

Bibliografia

• 1. CONWAY W.S., SAMS C.E., HICKEY K.D. Pre- and postharvest calcium treatment of apple fruit and its effect on quality. Acta Hort. 594, 467, 2002.
• 2. FAUST M., SHEAR C.B., SMITH C.B. Investigations of corcing disorders of apples. I. Mineral gradient in ‘York Imperial’ apples. Proc. Am. Soc. Hort. Sci. 91, 69, 1967.
• 3. MARSCHNER H. Mineral nutrition of higher plants. Acadmic Press Ltd., London, 1988.
• 4. OSTROWSKA A., GAWLIŃSKI S., SZCZUBIAŁAKA Z. Methods of analysis and plant and soil assesments. Institute of Environmental Protection, Warszawa, 1991 [In Polish].
• 5. POOVAIAH J.W. Biochemical and molecular aspects of calcium action. Acta Hort. 326, 139, 1993.
• 6. RAESE J.T. Effect of calcium sprays on control of black end, fruit quality, yield and mineral composition of ‘Barlett’ pears. Acta Hort. 367, 314, 1994.
• 7. SCHLEGEL T.K., SCHÖNHERR J. Penetration of calcium chloride into apple fruits as affected by stage of fruit development. Acta Hort. 594, 527, 2002.
• 8. TOMALA K., TRZAK M. Occurence of cork spot (pit) in ‘Alexander Lucas’ pears depends on fruit mineral element content. Acta Hort. 368, 570, 1994.
• 9. TOMALA K. Orchard factors affecting nutrient content and fruit quality. Acta Hort. 485, 257, 1999.
• 10. TOMALA K., SOSKA A. Effect of calcium and/or phosphorus sprays with different commercial preparations on quality and storability of Šampion apples. Hort Sci. (Prague) 31, 12, 2004.
• 11. TROMP J. Mineral absorption and distribution in young apple trees under various environmental conditions. [in:] Atkinson D., Jackson J.E., Sharples R.O., Waller W. (Eds.) Mineral nutrition of fruit trees. Butterworth, London, pp. 173-182, 1980.
• 12. ZOCCHI G., MIGNANI I. Calcium physiology and metabolism in fruit trees. Acta Hort. 383, 15, 1995.