Seed germination and growth are critical for orchid conservation and sustainable utilization,yet most orchid seeds are tiny and lack an endosperm and suitable nutrition. Based on previous experience,two experimental sowing methods( sowing with diluted cow-dung +seed and rice-water + seed) for Dendrobium devonianum Paxt. were applied successively to sow on the trunks of different tree species in the field. The seedlings were monitored and recorded for four years. Results showed that many seeds germinated and...