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以吉林汪清林业局金沟岭林场中41块天然云冷杉针阔混交林样地为对象,采用主成分-聚类分析,结合GIS技术,对该区域土壤肥力质量进行综合评价。结果表明,按主成分-聚类分析结果将41块样地分为4类:第1类土壤肥力质量综合得分为11.17~18.86(优),包括5块样地;第2类土壤肥力质量综合得分为3.01~7.44(良),包括8块样地;第3类土壤肥力质量综合得分为-6.97~1.27(一般),包括24块样地;第4类土壤肥力质量综合得分为-12.40~-9.63(差),包括4块样地。然后采用Arc GIS软件对综合得分进行普通Kriging插值,其标准均方根预测为0.9544,在1的附近,这基本达到插值精度的要求。从生成的研究区土壤肥力质量综合得分空间分布图来看,森林土壤肥力质量由西向东呈现先降低后升高的趋势;由北向南,森林土壤肥力质量变化幅度逐步减小,表明研究区南部土壤肥力质量变化较北部均匀。就研究区的整体土壤肥力质量而言,土壤肥力质量中等以上(优,良,一般)样地数占所研究区样地总数比例为90.24%,表明所研究区森林土壤肥力质量整体处于良好水平。
Based on 41 natural spruce-fir coniferous-broadleaf mixed forest plots in Jingouling Forest Farm, Wangqing Forestry Bureau, Jilin Province, principal component-cluster analysis and GIS were used to evaluate the soil fertility quality in this region. The results showed that according to the result of principal component-cluster analysis, the 41 plots were divided into 4 categories: the comprehensive fertility of the first type of soil fertility was 11.17-18.86 (excellent), including 5 plots; the second type of soil fertility composite The scores of soil fertility were from 3.01 to 7.44 (good), including 8 plots. The soil fertility quality of the third group was -6.97-1.27 (general), including 24 plots. The soil fertility quality of the fourth group was -12.40 ~ -9.63 (Poor), including 4 plots. Then the general Kriging interpolation is performed by using ArcGIS software. The standard root mean squared root prediction is 0.9544. In the vicinity of 1, this basically meets the requirements of interpolation precision. From the spatial distribution map of integrated soil fertility quality in the study area, the quality of soil fertility in forest showed a trend of decreasing and then increasing from west to east. From north to south, the change range of forest soil fertility quality gradually decreased, indicating that the southern part of the study area Soil fertility quality changes more evenly than the north. For the overall quality of soil fertility in the study area, the ratio of the number of sample plots with good soil fertility (excellent, good and moderate) to the total sample plots in the studied area was 90.24%, indicating that the quality of soil fertility of forest soil was in good condition .