ABSTRACT
The latosol soils in the banana field of tropical Hainan were selected as the research object to explore the aggregate physical stability of latosol particles in the banana field by analyzing the tensile strength and penetration resistance of aggregates with different particle sizes (10-8mm, 8-5mm, 5-3mm and 2-1mm). The results show that: (1) the tensile strength of aggregates decreases with the increase in particle size, which shows that the tensile strength of aggregates is affected by soil bulk density and mechanical composition, and the tensile strength of aggregates increases with the increase of bulk density and sand content. (2) The long-term use of chemical fertilizer will harden the soil and increase the penetration resistance; the surface soil contains more organic matter than the surface and lower soil, and the water content is higher. On the one hand, the organic matter can improve the soil structure; on the other hand, because the water content of the surface is higher than that of the lower layer, it is convenient to form a thick water film on the particle surface, which makes the probe easier Penetration into the aggregate, which is why the penetration resistance of the topsoil is lower than that of the lower layer.
