不同坡位5年生无患子人工林生物量及结实量差异分析

Difference Analysis of Biomass and Cone Crop of Five-year-old Sapindus mukorossi Plantation under Different Slope Positions

[目的]研究不同坡位5年生无患子人工林生物量及结实量差异,为无患子科学合理种植提供理论依据。[方法]以5年生无患子人工林为研究对象,通过野外样地调查,分析不同坡位对无患子生长量、生物量及结实量的影响。[结果]不同坡位无患子林分乔木层地上部分生物量变化范围在4 370.22~21 456.08 kg/hm^2,根系生物量变化范围在3 507.69~8 898.01 kg/hm^2,林下植被层生物量变化范围在11 167.23~18 084.24 kg/hm^2,林分结实量变化范围在180.01~384.03 kg/hm^2。[结论]无患子林分生长量、林分生物量及林分结实量均表现为下坡位最大,中坡位居中,上坡位最小。

[ Objective ] To research the differences in biomass and cone crop of five-year-old Sapindus mukorossi plantation under different slope positions,and to provide theoretical foundalion for the rational and scientific planting of S. mukorossi. [ Method ] With five-year-old S. mukorossi plantation as the research object ,effects of slope position on the growth ,biomass and cone crop of S. mukorossi were analyzed based on the investigation of field sample plot. [ Result] Change range of aboveground part biomass of arbor layer was between 4 370.22 and 21 456.08 kg/hm^2. Change range of underground part biomass was 3 507.69 -8 898. O1 kg/hm^2. The change range of anderstory vegetation biomass was 11 167.23 - 18 084.24 kg/hm^2. Change range of stand fruit setting amount was 180.01 - 384.03 kg/hm^2. ~ Conclusion] Stand growth ,stand biomass and stand cone crop of S. mukorossi are in the order of lowslope 〉 midslope 〉 upslope.