Bilyana HARIZANOVA – PETROVA, Antoniya OVCHAROVA

Investigation the relationship “Yield – Evapotranspiration” by stages of rooted celery, variety “IBIS” in the region of Plovdiv

Anahtar Kelimeler:

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Investigation the relationship “Yield – Evapotranspiration” by stages of rooted celery, variety “IBIS” in the region of Plovdiv

The purpose of this study was to be established the parameters of the "Yield – ET” by stages of turnip rooted celery (celeriac), variety "IBIS", using drip irrigation in the conditions of Plovdiv. The experiment was conducted on the experimental field of Department of Melioration and Land Surveying, Agricultural University – Plovdiv during 2010-2012. The parameters of the relationship have been established based on existing formulas as follows: first and second degree of exponent formulas of Davidov D. and linear formula of FAO. The used data are the yield and ET by stages of celery with the following variants: 1) irrigation with 130% of the irrigation rate m; 2) irrigation with 100% of the estimated irrigation rate m - 1 control; 3) irrigation with 70% of irrigation rate m; 4) irrigation with 50% of irrigation rate m; 5) irrigation with 30% of irrigation rate m; and 6) without irrigation - control 2. For the purpose of the investigation the growing season of celeriac is divided into three sub-stages (from transplant of seedlings to the beginning of celery root formation, start of root growth; intensive root growth). The investigated relationship for the conditions of the experiment is best represented by a second degree formula of Davidov D. at R = 0.939. The exponent for the entire growing period is N = 1.4. The values of the exponents for the different sub-stages of growing period are as follows: M1 = 0.13; M2 = 1.03 and M3 = 1.06. This means that the celery root production is very susceptible during the second and third substage of growth

Keywords:

rooted celery, drip irrigation evapotranspiration,

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