Study On Hydroponics Theory And Technology Of Three Ornamentals

This dissertation has used three useful ornamentals .Aglaonema modestum, Schefflera octophylla and Zebrina pendulaas as experiment materials. It has discussed the best rooting condition with cuttings, the best nutrition solution for each ornamental, and distinguished the differences between soil-cultured plant and solution-cultured plant in morphological and anatomical researches. At last has compared the physiological indexes of each plant. All the researches above may provide some academic and technical supports for hydroponics. The results are as follows:1 rooting experiment in solutionSelecting healthy and well developed sticks, without plant diseases and insect pests, with sharp branch scissors to apply cutting techniques in water. The result shows the rhizogenesis of Aglaonema modestum treated without any medicine (by water) grows well, and the average number of root could be 9 in 60 days; treating with IBA 50 mg/L + ASD 50 mg/L, then keep 6 hours dunking for Schefflera octophylla can root well, and the average number of root could be 24.6 in 60 days; treating with NAA 50 mg/L + IBA 100 mg/L + ASD 200 mg/L, then 15s dunking for Zebrina pendula can root well, and the average number of root could be 33 in 30 days.2 nutrition solution and condition selectingThe content of Chi is the highest of Aglaonema modestum by treating with the solution of Japan (1966), keep the pH 6.5 (7.0 with water) and EC 2.45; and the best solution for Schefflera octophylla is Hoagland and Arnon(1938), keep the pH 6.3 (6.5 with water) and EC 2.26; the best solution for Zebrina pendula is the solution of Japan (1966),keep the pH 6.3 (6.5 with water) and EC 2.49,and the content of Chl,Chla,Chlb are higher than that of other two solutions.