Effects of sand burying on seed germination and seedling growth of Kengyili rigidula

In order to investigate effects of sand burial depths on Kengyili rigidula seedling emergence and growth under natural conditions, a simulation study was conducted with six sandburial depths (0, 1, 2, 3, 4 and 5 cm). The results showed that the sand burial depth had significant effects on seed germination, seedling emergence and seed dormancy of K.rigidula. The seedling emergence rate of K.rigidula decreased with increasing of sand burial depth. It was 13.6%, 78.4%, 63.2% and 63.6% when the burial depths were 0, 1, 2 and 3 cm, respectively. It could be concluded that a sandburial depth of 1-3 cm might be more suitable to the seedling emergence and growth of K. rigidula, while the burial depths of 0 and 4 cm might be unfavorable to the seedling emergence and growth.