利用数字土壤制图技术评价桉树林土壤肥力

Evaluation of Soil Fertility under Eucalyptus Plantation Using Digital Soil Mapping

精细的土壤肥力空间信息有助于森林质量精准管理。本研究以广西高峰桉树林场为研究区,利用数字土壤制图技术对研究区主要肥力因子空间分布进行数字制图,在此基础上,应用灰色关联度模型对桉树人工林土壤肥力进行了综合评价。结果表明:研究林场的土壤肥力质量较好,土壤肥力水平2级和3级林地面积占总面积的68.6%,1级和4级林地面积占26%,5级林地面积占5.4%;土壤肥力综合指数(IFI)具有较强的空间自相关性。本文提出的土壤肥力评价方法可用于森林土壤肥力质量空间分布的精准评价,为森林质量精准经营提供基础支撑。

The high-resolution spatial distribution information of soil fertility contributes to the accurate improvement of forest quality. Based on the digital soil mapping technology, the main soil fertility factors were mapped digitally in the Gaofeng Eucalyptus Forest Farm of Guangxi. The grey correlation model was applied to comprehensively evaluate the spatial distribution of soil fertility under eucalyptus plantation based on GIS and digital soil mapping technology. About 68.6% of the total area was at 2-3 grades of soil fertility, 26% at 1 and 4 grades, and only 5.4% at 5 grades. The spatial auto-correlation of soil fertility index was strong. The soil fertility evaluation method proposed in this paper can realize the accurate evaluation of spatial distribution of forest soil fertility quality, and can provide a basic data support for the accurate management of forest quality.