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团聚体稳定性是土壤结构的重要属性.国内外团聚体稳定性量化研究较少,而能够定量评估团聚体稳定性的系统也少.鉴于该研究现状,本文设计了一套土壤团聚体稳定性评估系统,它利用功率超声粉碎土水溶液中土壤团聚体,通过实时监测土水溶液温度和超声系统输入功率的变化,并根据能量转化与守恒定律计算出土壤超声分散能量,进而确定土壤团聚体的稳定性.在实验室环境下对澳大利亚新南威尔士州Namoi和Narrabri的两种不同质地土样进行测量,其土壤分散能量分别为328和207 J·g~(-1),前者土壤结构更稳定.
Aggregate stability is an important attribute of soil structure.Studies on the quantitative analysis of aggregate stability are few at home and abroad, and there are few systems that can quantitatively evaluate the stability of aggregate.According to the present situation of research, a set of soil aggregate stability This system uses ultrasonic power to smash soil aggregates in soil water. Through real-time monitoring of soil water temperature and input power of ultrasonic system, the soil ultrasonic dispersion energy is calculated according to energy conversion and conservation law, and the stability of soil aggregates is determined The soil samples from two different soil samples of Namoi and Narrabri, New South Wales, Australia were measured under laboratory conditions with soil dispersive energy of 328 and 207 J · g -1, respectively. The former had a more stable soil structure.