engleski

Effects Of Plug Size, Mycorrhiza And Cultivation Period On Growth And Development Of Watermelon Transplants

Modern technology of watermelon production is based on watermelon cultivation transplants. Watermelon transplants are cultivated exclusively with root ball. The aim of this research was to determine optimal plug size, cultivation period and influence of mycorrhiza on the quality of watermelon transplants. The research was conducted during spring 2003 and 2004 in a heated plastic greenhouse. A three factorial trial was set up in randomized complete-block design with three replications. Factor ” plug size” had three levels: 100 ml cells (plug tray with 40 cells), 80 ml cells (plug tray with 60 cells) and 60 ml cells (plug tray with 84 cells). Second factor, “ mycorrhiza” had two levels: substrate inoculated with endomicorrhizal fungi Glomus mossae and substrate without endomicorrhizal fungi. Third factor, “ age of transplants” also had two levels: 30 and 45 days old transplants in 2003, respectively 40 and 55 days in 2004. In both research years in average, the best developed watermelon transplants were the ones planted in 100 ml cells (heighest stem, largest number of leaves, largest plant diameter, highest mass of plant and root). Differences between transplants in cells of 60 and 80 ml were not significant. In the second year inoculated transplants were better in all attributes comparing to inoculated ones. In both years more mature transplants (45 and 55 days after sawing) had more leaves, larger plant diameter, higher plant mass and root comparing to younger ones (30 and 45 days after sawing).

watermelon transplants; plug; mycorrhiza; Croatia

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