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The aquaponic sistem is giving by concomitant aplication of hydroponia (plant culture without soil) and aquaculture (culture of fish). To set up a aquaponic system more stages are necessary. The environment for aquaponic sistem should be attently chosen to avoid pollution factors. Taking in consideration cold regime in our country aquaponic system was settled down inside of micro greenhouse belogs to Institute of Research and Development for Processing and Marketing of Horticultural Products Bucharest. Fishponds were building using 0.8 mm OSB panel covered with polyethylene wrap. Water physico- chemical analyzes was performed as following: temperature, oxygen dissolved (DO), nitrate, nitrite, ammonia, calcium, magnesium and phosphorus. The studies performed showed the maintenance of aquaponic system [ABSTRACT FROM AUTHOR]

The scientific research is concerned continuously of achieving some high value biological creations, resistant or tolerant to diseases and pests, high productivity, high quality fruits; these goals are obtained by grafting. The eggplants are plants that can be grafted onto different rootstocks. The grafted seedlings transmit to crops quality, productivity, resistance to pests and diseases from soil, tolerance to abiotic stress factors, optimal absorption of water and nutrients, vigour. The study was conducted in a greenhouse of the Horting Institute Bucharest and it has followed the rootstock influence on the production quality at some grafted eggplants. The biological material has consisted of import F1 hybrids, eggplant scions (''Black Pearl'' and ''Classic'') and rootstocks (''Emperador'' and ''Torpedo'') commonly used in Romania for grafting of eggplants. It were determined form index (FI), form (F), weight/fruit (W), marketable production (MP), humidity (H) - gravimetric method, soluble dry matter (SDM) by refractometry method using ABBE refractometer, total sugar (TS) by Bertrand method. The results show that the grafting had influenced some aspects of the eggplant production. The conclusions of the researchers from the Horting Institute are in respect with some conclusions of the foreign researchers, but more researches are required in this domain to highlight the grafting effect on some aspects concerning production of grafted vegetables. [ABSTRACT FROM AUTHOR]