Study on Young Branch Propagation of Casuarina

After many times experiments,it was found that sand culture was the best way for young branch propagation of Casuarina in the condition of no or little direct sunlight, such as in room or under shade.Average rooting rate was 94% and the highest 100%.Under sunlight, water culture was better than the others.Sand culture could be used more widely than water culture, and suitable propagation season for sand culture was from April to October and suitable temperature was 25～30℃.The best IBA pre-treatment concentration for Casuarina young branches was 20～60ppm.The difference of rooting rates of severalspecies was obvious.Casuarina equisetifolia had the strongest ability for rooting, and C.glauca was the second; C.cunninghumiana was the third and C.junghuniana was difficult to root.Rooting rate difference of the branches from 1 to 4 year old mother trees in orchard was not obvious in sand culture.