首页|改良剂对粘质潮土团聚体特征及分形维数的影响

改良剂对粘质潮土团聚体特征及分形维数的影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
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  • 维普
为评价复合功能改良剂(NSA)对板结土壤的改良效果,通过小白菜盆栽试验,研究NSA对滨州粘质潮土的理化性状、土壤团聚体数量、分布和稳定性的影响.结果表明,增施NSA可降低土壤容重、比重和pH值,提高土壤总孔隙度;施用NSA显著增加了0.5～1 mm和0.25～0.5 mm的团聚体含量,显著降低了＜0.05 mm的团聚体含量,施用0.5％和1.o％的NSA后,土壤水稳性大团聚体总含量(R0.25)比CK分别显著提高67.14％和141.58％,NSA可将团聚体聚合成更大粒径来实现对土壤结构的改良;添加NSA使平均重量直径(MWD)和几何平均直径(GMD)显著提高,土壤不稳定团粒指数(ELT)显著降低;分形维数(D)随着NSA的添加而减少.施用NSA可促进土壤团聚体的形成,并提高其稳定性,对土壤结构具有显著的改善作用,这对进一步研制多功能的土壤改良剂提供了参考.
Effects of Soil Amendments on Characteristics and Fractal Dimension of Clay Soil Aggregates
By taking clay soil in Binzhou as research objects,pot experiments were conducted in order to evaluate the effects of nutritive soil amendments on compacted soil.Soil bulk density,soil specific gravity,porosity and soil aggregate were investigated,and stability of soil aggregate were calculated to study the effects of NSA on characteristics and fractal dimension of clay soil aggregates.The result showed that NSA could decrease pH,soil bulk density and soil specific gravity,and increase porosity.NSA significantly increased the content of 0.5 ～ 1 mm and 0.25 ～ 0.5 mm soil aggregate,while significantly reduced the content of ＜0.05 mm soil aggregate.The amount of water-stable macroaggregates (R0.25) of 0.5％ NSA and 1.0％ NSA were significantly higher than the control (CK),with an increase of 67.14 ％ and 141.58％.With soil amendments application,larger soil aggregates were formed to improve soil condition.Mean weight diameter (MWD),geometric mean diameter (GMD) and fracta[dimension (D) were significantly higher than the control,and the soil unstable aggregate index (ELT) decreased with amount of NSA which was the lowest in T3 treatment.The results indicated that applying NSA could improve surface soil structures through increasing water-stable macroaggregates contents and stability.This research provides academic and instructive bases for developing soil amendments.

soil amendmentsmean weight diametergeometric mean diametersoil aggregatefractal dimension

马征、张柏松、徐长英、董晓霞、边文范、郑福丽

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山东省农业科学院农业资源与环境研究所,济南250100

山东省植物营养与肥料重点实验室,济南250100

土壤改良剂 平均重量直径 几何平均直径 团聚体 分形维数

山东省农业科学院青年科研基金华北平原中南部旱地两熟区高强度利用退化及盐碱耕地培肥与合理农作制技术集成与示范省粮丰工程三期黄河三角洲盐碱地快速改良技术

2014QNM56201503121-062013BAD07B062014ZZCX07401

2016

10.13870/j.cnki.stbcxb.2016.05.056

水土保持学报
中国土壤学会　中国科学院水利部水土保持研究所

水土保持学报

CSTPCDCSCD北大核心
影响因子：1.226
ISSN：1009-2242
年,卷(期)：2016.30(5)
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