Effects Of Extraneous Factors On The Moso Bamboo Aboveground Biomass And Bamboo Shoots Growth Characteristics

This paper investigated how the aboveground biomass and shoot growth characteristics change under different extraneous factors in Moso bamboo (Phyllostachys edulis) of southern Anhui, aiming to provide some theoretical guidance and management for the development of Moso bamboo. The main results of this study are as follow:The average water content of bamboo aboveground organs presented that foliage(34.95%)>culm(54.52)%> branch(43.36%); The moisture content of different organs was significantly decreased with the increased of age; The biomass of foliage had the strongest variability, but the biomass of branch and culm had smaller variability compared with foliage; The culm had the maximum proportion of biomass, followed by branch, and finally leaves; The most suitable allometric relationship model was:lg w=a’+ blgD+clgH.There were significant difference in bamboo aboveground biomass between different elevation gradients, the change trend was increased at first and then decreased, and the H3 altitude had the maximum biomass. The aboveground biomass of Moso bamboo was decreased along with the increased of densities. A significant positive correlation was found between the soil total P content and bamboo aboveground biomass, and no significant correlations were found between Moso aboveground biomass and other soil chemical properties:soil water content, density, organic content and so on.Bamboo numbers exhibited increase at first and then decrease, with a trend: H3>H2>H1>H4; The bamboo degenerated shoot rate was, no significant differences were found in different altitudes. The start shooting time and end shooting time were all postponed along with the increasing of density. The shooting duration was between 42-52days, and reduced gradually with the increased of altitudes. The height growth of bamboo shoot of different elevations showed an "S" type trend. The best curve of the bamboo shoot height (H) and growth time (d) was the Logistic Function. There were no significant correlations between the bamboo shoot diameter and elevations.The shoot yield of different densities showed a "Para-curve" trend, and the maximum yield occur at 4000 suits/hm2～4500 suits/hm2. Both bamboo shooting duration and height growth duration were increasing with the increasing of density, but the maximum daily growth and average daily growth decreased. There was a significant negative correlation between shoot diameter and density. The density had little effect on bamboo height.The soil chemical properties has little influence on bamboo height and new stems, but the soil available P had much infect on the shoot diameter.