In two successive seasons of 2007 and 2008, pot experiments were conducted at the Experimental Farm of the Faculty of Agriculture, Kafr El-sheikh University to detect the efficiency of substituting peat moss as a traditional materials used for the growth of Golden zebra (Sanchezia nobilis) by compost and compost tea supplemental with PGPR (Azotobacter, Azosprillium, Bacillus polymexa, Serratia and Trichoderma viride). One year old transplants were transplanted to plastic pots (30 cm diameter) filled with different ratios of compost and peat moss as well as equal volumes of vermiculite and sand. All plants were fertilized with constant dose of ammonium nitrate (33.5% N) at the rate of 3g/ pot and that contain compost only sprayed four times with compost tea beginning from March 15th with two weeks intervals.
Rhizosphere biology including the survival and activities of major groups of microorganisms were studied. Growth characteristics of vegetative growth of shoots and roots as well as the chemical composition of leaves were also determined. The obtained results showed that the incorporation of compost instead of peat moss (5C +0P) was found to be stimulative to bacterial growth but was inhibitive to fungi in Sanchezia nobilis rhizosphere exhibiting antagonisms towards phytopathogenic fungi. Actinomyces showed inconsistent pattern but growth medium of (1C +4P) showed proportional increase. Plants grown in pots containing compost, peat moss, vermiculite and sand at ratios of (5:0:1:1) or (1:4:1:1) were the best combinations that achieved optimum growth of vegetative and root characters as well as chemical composition of leaves. Taken together, the role of compost (local product), and compost tea supplemented with PGPR, suggesting that this combination could be used safety and highly recommended as alternation growth medium for growing Sanchezia nobilis plants instead of imported peat moss.
Sanchezia nobilis, compost media and compost tea.