On Sillvicultural Techniques and Biomass Allocation of Young Plantation of Simmondsia chinensis in Dry-hot Valley of Jinshajiang River

Simmondsia chinensis is a tree species with important ecological and economic value, which fits to be planted in the dry-hot valley of Jinshajiang River. The conclusions were drawn from different experiments as follows:Making micro-habitat was an effective way for planting Simmondsia chinensis successfully in this area. Planting by directive sowing should be carried out by the end of rainy season(in autumn), while sapling planting should be done in the dry season. The biomass of individual plant and the biomass of each organ increased along with the age increment. The maximum increments of biomasses in stem, branch, leaf and root system took place in 2-year-old, but flower biomass increased quickly at the 4^th year. Biomass allocation in different organs varied along with the age of the plants.