Effects of Slope on Population Growth and Biomass Allocation of Polygonatum cyrtonema in Phyllostachys edulis Forest

Abstract:

The?growth and biomass??allocation of Polygonatum cyrtonema at different slope positions were studied under extensive managed and?structure consistent Phyllostachys edulis forest. The results showed that population density, leaf chlorophyll?values, biomass accumulation of leaves and roots, and biomass distribution pattern in leaves, roots and?tubers of P. cyrtonema had no significant differences among different?slope?positions in bamboo forest. The biomass distribution patterns of P. cyrtonema at different?slope?positions were order as?tuber biomass > root biomass > leaf biomass ≈ stem biomass, and tuber biomass was?more than 70% of total biomass, while biomass?allocated in roots, leaves, and stems were uniform.?There was obvious slope effect on population growth, biomass allocation of Polygonatum cyrtonema in bamboo forest. Under consistent of stand structure?and management in?bamboo forest, lower slope was considered to compound management with P. cyrtonema.

Key words:Polygonatum cyrtonema;Phyllostachys edulis;Slope position;Bamboo?density;Biomass allocation