Production of rocket (Eruca sativa Mill.) on plug trays and on a floating system in relation to reduced nitrate content | Pridelava navadne rukvice (Eruca sativa Mill.) v gojitvenih ploščah in na plavajočem sistemu in možnosti redukcije vsebnosti nitrata
2013
JAKŠE, Marijana | HACIN, Janez | KACJAN MARŠIĆ, Nina
Inglés. The effect of the growth system on the yield and nitrate content of rocket (Eruca sativa Mill.) was evaluated in two experiments. In the first experiment, different sizes of cells in plug trays and different fertilization treatments were tested. In the second, a floating system was used with different substrates and the nitrate content in rocket leaves was analysed. The size of the cells did not affect the yield of rocket significantly but the yield was notably higher (2.02 - 2.21 kg m-2) when plugs were fertigated once per week with 6:12:36 + ME + natural biostimulant in comparison with plugs fertigated only with a water soluble fertilizer (1.53 - 1.74 kg m-2). The best yield was obtained in vermiculite and perlite in 20 ml cells (2.13 and 1.89 kg m-2). The different substrates used in the floating system had no effect on the dry matter content, which was on average 13.7 % and was significantly lower than the dry matter content of leaves grown in peat (19.1 %). The nitrate content in leaves measured a day before and 10 days after the replacement of the nutrient solution with tap water, fell greatly from 4,288-6,764 mg NO3 kg-1 FW to 52-634 mg NO3 kg-1 FW.
Mostrar más [+] Menos [-]Esloveno. Učinek tehnologije gojenja na pridelek in vsebnost nitratov pri navadni rukvici (Eruca sativa Mill.) je bil izvrednoten v dveh poskusih. V prvem poskusu smo primerjali različne velikosti vdolbin v gojitvenih ploščah in različna gnojila. V drugem poskusu pa smo gojili rukvico na plavajočem sistemu v različnih substratih in analizirali vsebnost nitratov v listih. Velikost vdolbin ni vplivala statistično značilno na pridelek. Pridelek je bil največji (2,02-2,21 kg m-2), ko smo gojitvene plošče fertigirali enkrat tedensko z vodotopnim gnojilom 6:12:36 + ME in dodatkom naravnega biostimulanta v primerjavi z ploščami, ki smo jih fertigirali samo z vodotopnim gnojilom (1,53-1,74 kg m-2). Najboljši pridelek smo dobili v vermikulitu in perlitu v 20 ml vdolbinah (2,13 and 1,89 kg m-2). Različni substrati niso imeli vpliva na % sušine v listih, ki je bila v plavajočem sistemu povprečno 13,7 % in statistično značilno manjša od sušine v listih navadne rukvice, gojene v šoti (19,1 %). Vsebnost nitrata v listih smo merili 10 dni pred pobiranjem, ko so rastline še rastle v hranilni raztopini in na dan pobiranja, ko smo hranilno raztopino nadomestili z navadno vodo. Vsebnost nitratov se je zelo zmanjšala, iz 4,288-6,764 mg NO3 kg-1 sveže snovi na 52-634 mg NO3 kg-1 sveže snovi.
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