Effect of growth media and plant growth promoting rhizobacteria (PGPR) on growth and flowering indices of China Aster | Učinek gojišča in rast zvpodbujajočih rizobakterij (PGPR) na rast in cvetne indekse kitajske nebine

anglais. Our work focused on applying different growth media and plant growth promoting rhizobacteria (PGPR) treatments on growth parameters of China Aster as a worldwide ornamental plant. This plant has many uses such as medicinal plant, seasonal and cut flower and green spaces or landscaping. The treatments included four types of growth media (soil (S), soil+perlite (SP), soil+cocopeat (SC) and soil+cocopeat +perlite (SCP)) and three types of incubation status included incubation with plant growth promoting rhizobacteria (PGPR) of  Bacillus subtilis (B.subtilis) and Pseudomonas putida (P.putida), and no-bacterial incubation with three replicates. Regardless of growth media, P.putida had greater plant height than B.subtilis. SCP with or without bacterial incubation had the highest plant height and numbers of axillary shoots among the applied growth media. SCP with P.putida had the greatest chlorophyll content (1.29 mg.g-1 FW) and leaf area (1495.05 mm2). SCP with or without bacterial incubation had the highest number and diameters of flowers among other treatments. SCP plus P.putida  showed maximum leaf nitrogen (N), SC and SP plus  B.subtilis had highest leaf phosphorous (P) and  potassium (K), respectively. Our results demonstrated that applying SCP as a compound growth media, with or without bacterial incubation, had best effects on growth and flowering indices.

slovène. Kitajska nebina se uporablja v različne namene kot so izdeleva šopkov, cvetnih aranžmajev, kot pokrovna cvetica in za obrobe v vrtovih. Raziskava se je osredotočila na uporabo različnih rastnih medijev in rast vzpodbujajočih rizobakterij (PGPR) na pospeševanje rasti kitajske nebine. Uporabljeni so bili štirje rastni mediji in sicer: vrtna zemlja (S), vrtna zemlja + perlit (SP), vrtna zemlja + ostanki kokosa (SC), in vrtna zemlja + ostanki kokosa + perlit (SCP)), s tremi režimi inokulacije: inokulaciji z bakterijama Bacillus subtilis (Ehrenberg (1835) Cohn 1872 in Pseudomonas putida Trevisan 1889 in kontrola brez bakterijske inokjulacije, vse v treh ponovitvah. Ne glede na rastne medije je inokulacija z bakterijo P. putida dala višje rastline kot tista z bakterijo B. subtilis. Med preiskušenimi rastnimi mediji so bile rastline na SCP najvišje, z največ stranskih poganjkov. Rastline na SCP z bakterijo P. putida so imele največjo vsebnost klorofila in največjo listno površino, imele so največ cvetov in največjo vsebnost dušika v listih. Rastline na gojiščih SC in SP, inokulirane z bakterijo B. subtilis, so imele v listih veliko vsebnost fosforja in kalija. Uporaba SCP kot sestavljenega gojišča, z ali brez inokulacije z bakterijami, ima najugodnejši vpliv na rast in cvetne indekse kitajske nebine.