摘要
【目的】研究土壤颗粒分形维数与土壤肥力之间的关系,为土壤颗粒分形维数作为评价滨海地区土壤肥力的综合指标提供理论依据。【方法】选取浙江省绍兴市上虞区滨海地区4种土地利用方式(新垦海涂、水稻田、果园地和菜园地)的0~100 cm土壤剖面为研究对象。应用分形理论对滨海地区不同土地利用方式土壤颗粒分形维数、pH、EC、土壤养分和酶活性进行研究,探讨了土壤颗粒分形维数与土壤颗粒组成及土壤肥力之间的关系。同时利用因子分析法研究了各理化因子对滨海地区土壤颗粒分形维数的影响。【结果】研究区土壤颗粒分形维数主要在2~3之间;水稻土、果园土和菜园土的土壤颗粒分形维数显著高于新垦海涂;土地利用方式对土壤剖面中颗粒组成分布产生显著影响(P<0.05),进而影响到土壤剖面的颗粒分形维数;新垦海涂和水稻土土壤颗粒分形维数在0~20 cm土层中最高,而果园土和菜园土土壤颗粒分形维数在80~100 cm土层中最高。【结论】土壤颗粒分形维数与土壤肥力相关性显著(P<0.01),较好地反映土壤肥力,可作为评价滨海地区土壤肥力的定量指标之一。
【Objective】Soil particle composition and its fractal dimension are a parameter to characterize soil physical property;they are closely correlated to soil fertility and productivity. The purpose of this paper is to study its variation with land management.【Method】The experiment site was at Shangyu County in Shaoxing City of Zhejiang Province. Soil samples were taken from 0~100 cm profile from four land managements: tidal flat, paddy field, and orchard and vegetable field. For each sample, we measured its particle composition and fractal dimension,pH, EC, nutrients and enzymatic activities, from which we analyzed if and how soil fertility and physicochemical properties are correlated to fractal dimension and particle composition using factor-analysis method.【Result】The fractal dimension was in the range of 2 to 3, and it was significantly higher in the paddy, orchard and vegetable field than in the tidal flat. The land use affected content and distribution of particle composition and fractal dimension both at significant level(P<0.05). In the newly reclaimed coastal saline soil and paddy soil, the fractal dimension is the highest in the 0~20 cm soil layer, while in the orchard and vegetable field, it is the highest in the 80-100 cm soil layer.【Conclusion】There is a significant correlation between soil particle fractal dimension and soil fertility(P<0.01). The fractal dimension, which is easy to measure, can thus be used as a proxy for soil fertility in evaluating soil health.
作者
朱芸
傅庆林
郭彬
林义成
刘琛
ZHU Yun;FU Qinglin;GUO Bin;LIN Yicheng;LIU Chen(College of Forestry,Nanjing Forestry University,Nanjing 210037,China;Institute of Environmental Resources,Soil and Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China)
出处
《灌溉排水学报》
CAS
CSCD
北大核心
2023年第1期130-137,共8页
Journal of Irrigation and Drainage
基金
浙江省粮食主产区农田地力快速培育与修复技术研究与示范项目(2019C02008)。
