论文部分内容阅读
运用分形理论对九龙江流域4种类型杉木混交林土壤粒径的分形维数与土壤水稳性团聚体、团聚体含量及结构体破坏率关系进行研究,比较分析了不同类型杉木混交林土壤结构的分形维数,建立了土壤结构分形维数与土壤理化性质的回归模型.研究结果表明,杉木混交林土壤分形维数与土壤水稳性团聚体、团聚体含量、结构体破坏率及土壤理化性质呈显著回归关系,分形维数与>0.25mm土壤颗粒含量线性负相关,与结构体破坏率呈线性正相关.杉木米老排混交林土壤团粒结构的分形维数最小,土壤结构、稳定性及肥力状况最好,而杉木巨尾按混交林土壤自我培肥能力最差.分形理论在林地土壤肥力研究上的应用为林地评价提供了新方法.
The fractal theory was used to study the relationship between the fractal dimension of soil particle size and the content of soil water-stable aggregates and aggregates and the destruction rate of structural bodies in four types of Chinese fir mixed forests in Jiulongjiang River Basin. The fractal dimension and the regression model of soil physical and chemical properties were established.The results showed that the relationship between soil fractal dimension and soil water-stable aggregates, aggregate content, structure destruction rate and soil There was a linear regression relationship between the fractal dimension and soil particle content> 0.25 mm, which was linearly and positively correlated with the damage rate of the structure. The fractal dimension of the soil aggregate structure was the smallest in the mixed forest of Cunninghamia lanceolata and Mudanjiang rice, the soil structure and stability Sex and fertility were the best, while the giant tail of Cunninghamia lanceolata had the worst self-fertilization ability in mixed forest soil.Application of fractal theory in the study of forest soil fertility provided a new method for forest land evaluation.