Naslov
Incidence of tomato blossom-end rot at different calcium levels

Autori
Benko, Božidar ; Borošić, Josip ; Poljak, Milan ; Osvald, Jože

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of 28th International Horticultural Congress (Vol. 2) / Rallo, L. ; De la Rosa, R. ; Monteiro, A. ; Bras de Oliveira, P. - Lisabon : International Society for Horticultural Science, 2010, 210-210

Skup
28th International Horticultural Congress

Mjesto i datum
Lisabon, Portugal, 22.08.2010. - 27.08.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
BER; calcium nitrate; cultivar; Lycopersicon esculentum Mill.; nutrient solution; physiological disorder

Sažetak
Blossom-end rot (BER) is one of the most significant physiological disorders in the greenhouse tomato cultivation. It often occurs during tomato growing in the soil, but also in the soilless culture. Since the water and nutrients supply could be regulated in the hydroponics, the aim of this research was to determine the intensity of blossom-end rot occurrence at different calcium concentrations in the nutrient solution. Along with the standard nutrient solution which contained 0.925 g of calcium nitrate per liter, solutions with 50 % reduced, and also 50 and 100 % increased concentration of calcium nitrate were applied. Varying the concentration started four weeks after planting. Four tomato cultivars grown on rockwool were tested. Application of solutions with different calcium nitrate concentrations resulted with the share of BER fruits between 11.6 and 14 %. The share of affected fruits at different cultivars varied from 9.3 to 21.3 %. Interaction of tested factors resulted with a BER fruits share in the range from 7.1 to 22.5 %. Between 75 and 100 marketable fruits weighted from 144 to 263 g was picked per m2. Marketable yield varied from 13.77 to 25.24 kg•m-2. Application of decreased or increased calcium concentration in the nutrient solution resulted with significant differences in BER affected fruits number between tested cultivars, which mean that the concentration should be adapted to the needs of each cultivar during the growing season. Beside the concentration of calcium and growing of cultivars resistant to the blossom-end rot incidence, special attention is paid to the regulation and maintenance an optimum microclimate conditions in the greenhouse, in order to promote the absorption and transport of calcium through the plant.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA