不同土地利用方式对滨海盐土土壤颗粒组成及分形维数的影响

朱芸; 傅庆林; 郭彬; 林义成; 刘琛

引用本文:	朱芸,傅庆林,郭彬,等.不同土地利用方式对滨海盐土土壤颗粒组成及分形维数的影响[J].灌溉排水学报,0,():-.
	ZHU Yun,FU Qinglin,GUO Bin,et al.不同土地利用方式对滨海盐土土壤颗粒组成及分形维数的影响[J].灌溉排水学报,0,():-.

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不同土地利用方式对滨海盐土土壤颗粒组成及分形维数的影响
朱芸¹, 傅庆林², 郭彬², 林义成², 刘琛²
1.南京林业大学林学院;2.浙江省农业科学院环境资源与土壤肥料研究所

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盐土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盐土地区四种土地利用方式(新垦海涂、水稻田、果园地和菜园地)的0-100cm土壤剖面为研究对象。应用分形理论对滨海盐土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。【结果】结果表明：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的含量和分布产生显著影响(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0-20cm土层中最高,而果园土和菜园土土壤颗粒分形维数在80-100cm土层中最高。土壤颗粒分形维数与土壤肥力相关性显著(P＜0.01)；碱解氮、全氮、有效磷和脲酶对滨海盐土土壤颗粒分形维数贡献率最大。

关键词: 滨海盐土;土地利用方式;土壤颗粒分形维数;土壤肥力

DOI：

分类号:S152

基金项目:

Effects of different land use types on soil particle composition and fractal dimension in coastal saline soil

ZHU Yun¹, FU Qinglin², GUO Bin², LIN Yicheng², LIU Chen²

1.College of Forestry,Nanjing Forestry University,Nanjing;2.Institute of environmental resources,soil and fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou

Abstract:

【Objective】The paper studied the relationship between soil particle fractal dimension and soil fertility, to provide a theoretical basis for soil particle fractal dimension as a comprehensive index to evaluate the soil fertility in coastal saline soil.【Method】The 0-100cm soil profiles of four land use types (tidal flat, paddy, orchard and vegetable soils) in Shangyu County, Shaoxing City, Zhejiang Province were selected to measure the fractal dimension, pH, EC, soil nutrients and enzyme activities by using fractal theory. The relationship between soil particle fractal dimension, soil particle composition and soil fertility was discussed.【Result】The results showed that the soil particle fractal dimension in the study area is mainly between 2 ~ 3; The soil particle fractal dimensions in paddy, orchard and vegetable soils were significantly higher than that in tidal flat soil; The land use types affected the content and distribution of particle composition in soil profile (P＜0.05), and then affected the particle fractal dimension in soil profiles; The fractal dimension of soil particles is the highest in 0-20cm soil layer in newly reclaimed castal saline soil and paddy soil, however, it is the highest in 80-100cm soil layer in orchard soil and vegetable garden soil. There is a significant correlation between soil particle fractal dimension and soil fertility (P＜0.01); Alkali hydrolyzable nitrogen, total nitrogen, available phosphorus and urease contributed the most to the soil particles fractal dimension.

Key words: Coastal saline soil; land use type; fractal dimension of soil particles; soil fertility