Konstrukcija prelivnog i odlivnog vertikalnog hidroponičkog sistema

The study was conducted by installing the Flood and Drain Vertical Hydroponic System for cultivating Chinese leafy vegetable Pak-choi (var. Choko) of family Brassicaceae. The system was designed in the department of Irrigation and Drainage Engineering, K. K. Wagh College of Agricultural Engineering and Technology with the help of CATIA software. The sowing of 112 seeds of Pak-choi was done in perforated net pots containing media of coco-pit (8% N : P : K treated) and vermiculite in 1:1 proportion. Irrigation was applied to the crop by deep flow technique through beds. The average pH readings before and after each irrigation was 6.40 and 6.76 and the average values of EC before and after each irrigation was 0.79 mmhos·cm-1 and 0.97 mmhos·cm-1, respectively. Also the average moisture content of media before and after each irrigation was noted, which was 18% and 71% respectively, available moisture content for complete growth of crop ranged from 46.73 to 57.05%. The water requirement of Pak-choi crop was 2.63 cm. The fertilizer applied was 1.9 gm N:P:K for overall growth of crop. The harvesting of crop was done after 70 days from sowing and the yield of crop was 7 kg from 1.8 m2 area. The total cost of system was estimated to be Rs.3400 /-. Highest germination of 96% was achieved with our hydroponic system, which was 26% more than germination percentage quoted by the manufacturing company of seeds. Yield of Pak-choi crop in hydroponic system was twice than the yield obtained from field conditions. Therefore, the Flood and Drain Vertical Hydroponic System designed gave 66% more cropping area than the open field.Istraživanje je izvedeno na instalaciji prelivnog i odlivnog hidroponičkog sistema za uzgoj kineskog kupusa (var. Choko) iz familije Brassicaceae. Sistem je konstruisan u Institutu za navodnjavanje i odvodnjavanje Fakulteta za poljoprivrednu tehniku i tehnologiju K. K. Wagh, pomoću programa CATIA. 112 semena kupusa je posejano u perforirana gnezda sa podlogom od kokosovih vlakana (tertian sa 8% N:P:K) i vermikulita u odnosu 1:1. Biljke su navodnjavane tehnikom dubokog toka kroz podloge. Srednje vrednosti pH pre i posle svakog navodnjavanja iznosile su 6.40 i 6.76, a srednje vrednosti EC pre i posle svakog navodnjavanja iznosile su 0.79 mmhos·cm-1 i 0.97 mmhos·cm-1, redom. Srednji sadržaj vlage u podlozi pre i posle svakog navodnjavanja iznosio je 18% i 71%, redom, a dostupna vlaga za potpuni porast biljaka varirala je od 46.73% do 57.05%. Zahtev biljaka za vodom iznosio je 2.63 cm. Za ukupni porast biljaka primenjeno je 1.9 gm N:P:K đubriva. Biljke su ubrane 70 dana posle setve, a prinos je iznosio 7 kg sa površine od 1.8 m2. Ukupna cena sistema procenjena je na Rs.3400 /-. Najveća kliavost koja je postignuta ovim hidroponičkim sistemom bila je 96%, što je 26% više od procenta klijavosti koji garantuje proizvođač semena. Prinos kineskog kupusa u hidroponičkom sistemu bio je dvostruko veći od prinosa postignutog u poljskim uslovima