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2002年8月,在吉林省白河林业局红石林场(12755E,4230N),沿着一个山坡设置了一个长宽为112m8m、包含14个样方的样带。调查了群落结构、0-10cm和10-20cm的土壤含水量、枯落物现存量及其C、N、P含量,主要树种的叶片和枝条的C、N、P含量。沿着山坡的不同位置土壤含水量的不同导致阔叶红松林的群落结构发生变化。蒙古栎的比例随着土壤含水量的下降而逐渐升高,而其他主要阔叶树种则逐渐减少乃至消失。枯落物的水分变化趋势与土壤一致。在不同坡位枯落物的分解状况不同,干重差异显著。坡下枯落物含量较坡上的丰富,部分原因在于群落结构的变化。水分和养分含量的变化影响了枯落物的成分、降解及其养分的释放,进一步影响了林木的生长速度和林分结构并最终影响整个生态系统。图7表2参14。
In August 2002, a transect of 14 plots was set along a hillside at Hongshi Forest Farm (12755E, 4230N) of Baihe Forestry Bureau of Jilin Province. Community structure, soil moisture content at 0-10 cm and 10-20 cm, litter standing stock, C, N and P contents and C, N and P contents of leaves and branches of main tree species were investigated. The differences of soil water content along the hillside caused the community structure of broad-leaved Korean pine forests to change. The proportion of Quercus mongolica gradually increased with the decrease of soil water content, while the other major broadleaf species gradually decreased or even disappeared. Litter water trends and soil the same. The litter decomposition in different slope position is different, the difference of dry weight is significant. Slope litter content than the slope rich, in part because of changes in community structure. Changes in water and nutrient content affect the litter composition, degradation and nutrient release, further affecting the growth rate and stand structure of forest trees and ultimately affecting the entire ecosystem. Figure 7 Table 2 参 14.