植物营养与肥料学报Issue(4)：1012-1020,9.DOI:10.11674/zwyf.2014.0425
湿筛过程中分散液的质量对土壤团聚体稳定性的影响
Effect of quality of dispersing solutions on soil aggregates stabilities during the wet-sieving test
摘要
Abstract
Objectives Soil aggregates are the basic units of soil structure. Sufficient chemical stability of soil aggregates is necessary for maintaining good soil moisture and fertility. Large amount of cations are brought into soil through fertilization and irrigation, which affect the aggregates stability to some extent. In this paper, the stability of aggregate in organic-rich black soil was determined in the three cation solutions. [Methods]Three kinds of cation solution, sodium chloride, chlorinated calcium chloride and aluminum chloride with four concentrations 0 mol/L ( de-ionized water without salt, CK) , 0. 1 mol/L, 0. 3 mol/L and 0. 5 mol/L are set up as media, and the stability of soil aggregates (≥0. 25 mm in size ) was tested using an improved Savi Chizhov ( CaBBиHoB ) method.[Results]The results show that the stabilities of soil aggregate ( PAD0. 25/W values) are quite different in different salt solution media. In sodium chloride solution, PAD0. 25/W values are all positive, and the soil aggregate destruction rate is increased with the salt concentration, the PAD0. 25/W values are 0. 21%, 10. 7% and 14. 4% in 0. 1, 0. 3 and 0. 5 mol/L of sodium chloride solution, respectively, showing the dispersion effect of the sodium salt to soil aggregates. In calcium chloride and aluminum chloride solutions, the PAD0. 25/w values are negative, and the absolute value of PAD0. 25/w is decreased with the increase of salt concentrations. Inside the aluminum chloride solutions, all the absolute PAD0. 25/w values are higher than 51%. [Conclusions] Monovalent salt solution exacerbates the dispersion of 0. 25-1 mm aggregates, protects the aggregates of more than 1 mm in diameter from dispersion. Divalent salt and trivalent salt show inhibition and protection to the dispersion of aggregates showing ability of strengthen soil aggregates.关键词
湿筛法/黑土/盐离子/团聚体稳定性Key words
wet-sieving test/cation/black soil/soil aggregate stability分类
农业科技引用本文复制引用
徐爽,王益权..湿筛过程中分散液的质量对土壤团聚体稳定性的影响[J].植物营养与肥料学报,2014,(4):1012-1020,9.基金项目
农业部苹果园沼肥应用技术研究与示范项目(201001070070)资助。 （201001070070）
