1. China National Bamboo Research Center, Hangzhou 310012, China; 2. National Long-term Observation and Research Station for Forest Ecosystem in Hangzhou-Jiaxing-Huzhou Plain, Hangzhou 310012, China; 3. Zhejiang Province Key Laboratory of High Efficient Processing of Bamboo, Hangzhou 310012, China; 4. Hangzhou Lin'an Taihuyuan Ornamental Bamboo Planting Garden, Lin'an 311306, China
Abstract：In order to clarify the difference in productivity and population renewal ability of different bamboo species, 9 amphipodial dwarf bamboo species were selected for pot experiment of seedlings, and the biomass allocation and accumulation of these bamboo seedlings in two growth cycles were analyzed, which could provide references for management and popularization of good amphipodial dwarf bamboos. The results showed that:(1) The total biomass accumulation rate of all the bamboo species was significantly affected by the biomass of bamboo root in the first year and the biomass of bamboo rhizome, root and leaf in the second year (P< 0.05); (2) With the rhizome fragments 5-6 cm long of breeding seedlings used as basic statistical and comparative units, the total biomass of Indocalamus decorus Q. H. Dai reached 36.51±2.13 g in the second year, while that of Sasa pygmaea (Miq.) E. G. Camus in the second year was only 15.36 ±1.34 g, and there was significant difference between them (P<0.05); and (3) The total biomass accumulation rates of I. decorus, Pleioblastus kongosanensis f. aureostriaus Muroi et Yuk. Tanaka and other large leaf bamboo species were significantly higher than those of S. fortunei (Van Houtte) Fiori, S. pygmaea and other small leaf bamboo species (P< 0.05). The study found that:(1) Different biomass allocation strategies have emerged in different renewal generations of bamboo in an attempt to better achieve the rapid colonization of bamboo population; and (2) The biomass and biomass accumulation rate of dwarf bamboo species in large leaf were significantly higher than those in small leaf, and under certain growth periods and environmental conditions, dwarf bamboo species in large leaf might have better environmental adaptability than that in small leaf.