Soilless Culture Techniques Of Osmanthus Fragrans Lour.

O. fragrans'Yanhong'has been studied on aspects of soilless cutting techniques,formula of mediums and nutrient solutions in soilless culture, provide practical and theoretical basis for mature of O. fragrans soilless culture.(1)The cutting experiments results show:Cuttings being of bark rooting type;Cuttings treated by 1.00mg/L IBA has the best effect;Water culture of O. fragrans'Yanhong'by nutrient solution formula of Hogaglands and Arnon grew better.The rooting rate of cuttings cultured on solid mediums is higher than cuttings water cultured;but water culture cutting has earlier rooting period and better quality adventitious root.(2)In medium experiment, bulk density of medium T2 (peat:vermiculite:perlite=2:l:1)is 0.160g/cm3, and porosity is 71.71%,pH value is 5.801, T2 is the best medium in soilless culture for O.fragrans'Yanhong', the second one that was T3 (peat : vermiculite : perlite =1:l:1).(3)In selecting experiment of different nutrient solutions, five formulas of nutrient solutions were adopted. Treatment A2 (formula of France Institute of Agriculture) is the most suitable for O. fragrans'Yanhong'growth. In the best nutrient solution experiment, the growing data of the plants were analyzed by the computer software. The regression equation of plant height and the chlorophyll content were established.Through the method of orthogonal gyration design on nutrient solution, the results suggested that the best value of plant height of O. fragrans'Yanhong'is 21.67cm, and the concentration of N, K, P in nutrient solutions is 201.515mg/L,146.576 mg/L,8.067mg/L respectively. The best chlorophyll content is 2.1230mg/g, and the concentration of N,K, P in nutrient solutions is 145.167mg/L,149.706 mg/L,55.105 mg/L respectively.(4)The main mineral elements content in leaf of O. fragrans'Yanhong'ranked in the order of: K>Ca>Mg>P>Fe≈Na>Zn>B. The content of elements K,P,B showed an increasing tendency before initial flowering,and then decreased the lowest;The element Fe was cost much in the period of flower bud differentiation, and with the blossom fell, it lost; So in these two periods, should increase the content of elements K,B,P,Fe of nutrient solution. In the period of flowering,the content of element Ca is highest,and Mg is in the period of flower withering. The content of element Zn decreased continually between flower bud differentiation to flower withering; the content variation of element Na needs research deeply.