不同坡位对秃杉生长的影响

Effects of Different Slope Positions on the Growth of Taiwania Cryptomerioides

笔者对邱家山国有林场不同坡位秃杉(Taiwania cryptomerioides)人工林的生长指标和土壤环境进行了差异分析和相关分析。结果表明,不同坡位20年生秃杉的胸径、树高、单株材积等生长指标差异显著,尤其是对单株材积影响最大,下坡位平均单株材积为0.1792 m 3,分别较中坡位和上坡位提高了33.63%和60.29%;不同坡位的土壤环境因子差异显著,0 cm^20 cm平均土壤含水率下坡较中坡(上坡)提高了5.30%(12.77%);不同坡位凋落物生物量和凋落物含水率表现为下坡>中坡>上坡;生长指标与土壤环境因子呈一定的相关性。秃杉造林应选择山体的中坡、下坡种植。

Difference analysis and correlation analysis on the growth index and soil environment of the 20-year-old Taiwania cryptomerioides plantation on different slope positions were carried out.Results showed that there were significant differences in the growth indicators such as diameter at breast height,tree height,and volume per plant of 20-year-old Taiwania cryptomerioides in different slope positions.And the effect of different slope positions on volume per plant was the biggest.The average volume per plant in the lower slope was 0.1792 m 3,33.63%and 60.29%greater than that of middle slope and upper slope respectively.There were significant differences in soil environmental factors at different slope positions.The average soil moisture content of lower slope at 0 cm^20 cm was 5.30%(12.77%)higher than that of middle slope(upper slope).The litter biomass and litter water content of different slope positions was lower slope>middle slope>upper slope.There was a certain correlation between growth indicators and soil environmental factors.Taiwania cryptomerioides afforestation should select the middle and lower slopes of the mountain.