In order to seek replacement materials for cultivation of orchids seedling， this research uses mixed substrates of different ratio corn cobs， peanut shells and mushroom waste sawdust. Results showed that young plant of Paphiopedilum were planted in mixed substrates at mixing ratio of 2:0:1 and 0:3:1(corn cobs: peanut shells: mushroom waste sawdust，v/v/v) were better than other treatments. The optimal substrates for seedlings of Paphiopedilum planting were controls treatment and mixed substrates at mixing ratio of 2:0:1 and 0:2:1(v/v/v). Using mixed substrates cause root-browning and slow growth of Dendrobium seedlings.Seedlings of Oncidium Wildcat growed well by using 100% mushroom waste sawdust as substrate. Seedlings of Onc. Rosy Sunset were planted in mixed substrates at mixing ratio of 2:0:1， 1:2:0 (v/v/v)， 100% corn cobs， 100% mushroom waste sawdust and control treatment were better than other treatments. The optimal substrates for seedlings of Cymbidium sinense were mixing ratio of 1:4:2， 1:2:4 (v/v/v)， and the optimal substrates for seedlings of Cymbidium ensifolium were mixing ratio of 1:2:4(v/v/v).According to the results， it is feasible that using corn cobs， peanut shells and mushroom waste sawdust to cultivate Paphiopedilum， Oncidium and Cymbidium， but not for cultivation of Dendrobium.
In order to seek replacement materials for cultivation of orchids seedling， this research uses mixed substrates of different ratio corn cobs， peanut shells and mushroom waste sawdust. Results showed that young plant of Paphiopedilum were planted in mixed substrates at mixing ratio of 2:0:1 and 0:3:1(corn cobs: peanut shells: mushroom waste sawdust，v/v/v) were better than other treatments. The optimal substrates for seedlings of Paphiopedilum planting were controls treatment and mixed substrates at mixing ratio of 2:0:1 and 0:2:1(v/v/v). Using mixed substrates cause root-browning and slow growth of Dendrobium seedlings.Seedlings of Oncidium Wildcat growed well by using 100% mushroom waste sawdust as substrate. Seedlings of Onc. Rosy Sunset were planted in mixed substrates at mixing ratio of 2:0:1， 1:2:0 (v/v/v)， 100% corn cobs， 100% mushroom waste sawdust and control treatment were better than other treatments. The optimal substrates for seedlings of Cymbidium sinense were mixing ratio of 1:4:2， 1:2:4 (v/v/v)， and the optimal substrates for seedlings of Cymbidium ensifolium were mixing ratio of 1:2:4(v/v/v).According to the results， it is feasible that using corn cobs， peanut shells and mushroom waste sawdust to cultivate Paphiopedilum， Oncidium and Cymbidium， but not for cultivation of Dendrobium.