Pregled bibliografske jedinice broj: 452805
Comparison of petiole nitrate concentrations and CCM chlorophyll readings in estimating ripeness of flue-cured tobacco leaves for harvest
Comparison of petiole nitrate concentrations and CCM chlorophyll readings in estimating ripeness of flue-cured tobacco leaves for harvest // CORESTA CD-ROM, CORESTA 2009 JOINT GROUPS MEETING, ROVINJ-CROATIA
Rovinj, Hrvatska, 2009. (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 452805 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Comparison of petiole nitrate concentrations and CCM chlorophyll readings in estimating ripeness of flue-cured tobacco leaves for harvest
Autori
Gršić, Kristina ; Čavlek, Miroslav ; Budimir, Ankica
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
CORESTA CD-ROM, CORESTA 2009 JOINT GROUPS MEETING, ROVINJ-CROATIA
/ - , 2009
Skup
CORESTA Meeting Agro-Phyto Groups
Mjesto i datum
Rovinj, Hrvatska, 04.10.2009. - 08.10.2009
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
nitrate petiole test; Chlorophyll meter; ripeness; flue-cured tobacco
Sažetak
A field trial was conducted for the purpose of comparing two diagnostic tests, the petiole sap nitrate test and the chlorophyll meter, and their applications in determining the ripeness of tobacco leaves for harvest. The experiment was carried out during the 2007 and 2008. The treatments were topping height (20 and 17 leaves for harvest), the manner of harvest (7, 4 and 3 primings) and the degree of ripeness at the time of harvest (4000 mg L-1, 3000 mgL-1 and 2000 mg L-1). The nitrate content was measured in the midrib sap in the laboratory using an ion selective electrode (ISE) and Cardy meter, and in the field using a Cardy meter. Additionally, the chlorophyll content index (CCI) was measured with a CCM-200 chlorophyll meter during the vegetation and at the moment of harvest. The nitrate concentration of the leaf midrib measured with an ISE in the laboratory showed significant correlation with the nitrate concentration measured by the Cardy meter in the laboratory, r=0.95, and there was less significant correlation with the chlorophyll meter reading, r=0.56. However, a stronger correlation, r=0.66, was obtained by comparing the nitrate concentration values measured with the Cardy meter in laboratory and chlorophyll readings in field. The results of these investigations showed that the relationship between nitrate concentrations and chlorophyll readings at the moment of harvest and yield, price per kg and value per ha, could be described by linear equations. The results also showed that a more reliable and significant relationship, especially for price per kg and value per ha, could be achieved with the chlorophyll readings.
Izvorni jezik
Engleski
Znanstvena područja
Poljoprivreda (agronomija)
POVEZANOST RADA
Projekti:
092-0000000-3585 - Odnos između zrelosti i kvalitete lista virdžinijskog duhana (Čavlek, Miroslav, MZOS ) ( CroRIS)
Ustanove:
Duhanski institut Zagreb