Selection Of Formula Of Substrates And Nutrient Solutions In Soilless Culture For Rieger Begonia

Rieger Begonia (Begonia×Elatior) , perennial herb, belongs to begonia genus of begoniaceae family. It is the hybrid strain of B. Socotrana flowering in winter and B. tuberous flowering in summer, with the feature of short-day flowering on B. Socotrana and advantages of big flowers, abundant color on B. tuberous. At present, Rieger Begonia becomes popular commercial potted flower.In this experiment, the methods of pot experiment, simulating indoor and orthogonal gyration design were used to study the formula of substrates and nutrient solutions in soilless culture for Rieger Begonia, to put forward the technical system for its production in factory. The formula of substrates and nutrient solutions fitting in with its growth were selected out in this thesis. The results were as follows: (1)In substrate experiment, treatment T6 (peat : vermiculite: perlite 2:1:1) has good physical character, high content of organic matter, abundant N,P,K, pH in 5.0~6.5, so it is suitable for the growth of Rieger Begonia. All-round considering, it is the best substrate in soilless culture for Rieger Begonia, the second one that was T2( peat : vermiculite 1:1). (2)In selecting experiment of different nutrient solutions, five formula of nutrient solutions were adopted. Treatment T2 (Hoagland and Snyder) is more suitable for Rieger Begonia growth. (3)In the best nutrient solution experiment, the growing data of the plants were analysed by the computer software. The regression equation of plant height, the chlorophyll content and the anthocyanin content were established. (4)Through the method of orthogonal gyration design on nutrient solution, the results suggested that the best value of plant height of Rieger Begonia is 13.46 cm, and the concentration of N , K2O, P2O5 in nutrient solutions is 228.052 mg/L, 379.545 mg/L, 88.630 mg/L respectively. The best chlorophyll content is 1.2838 mg/g, and the concentration of N , K2O, P2O5 in nutrient solutions is 232.691 mg/L, 339.782 mg/L, 28.091 mg/L respectively. The beat anthocyanin content is 0.4263 Abs, and the concentration of N , K20, P205 in nutrient solutions is 134.713 mg/L, 132.840 mg/L, 27.218 mg/L respectively.