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在生产过程中,旱作地耕层常存在着土壤颗粒之间的垒结现象,即土壤团聚体的存在。这种结构状况主要是受耕耙等一系列耕作措施的影响。 尽管由于种植不同的作物,以及土壤特性和气候条件等的差别,这种团聚体结构的性质会有所不同,但一般地说,在外形上这种土壤团聚体是不很规则的,不同的圆、扁、棱角形状均可出现,然而主要是属于接近圆形的团聚体。从质量上说,所谓结构的水稳性即结构抵抗水的冲激作用的能力,和结构的粘结性即抵抗机械破坏的能力,也有所不同。如果按照一般采用的蕯甫威诺夫土壤结构稳固性的测定法测定,因为团聚体在水中剧烈的振动多数遭到破坏,因此具有这种结构的土壤,有人便看作无结构或叫单粒结构难以使作物丰产的土壤。但是这种看法是不正确的,
In the process of production, dry-land plow often has the phenomenon of base-junction between soil particles, that is, the existence of soil aggregates. This structural condition is mainly influenced by a series of tillage measures such as cultivating harrows. Although the properties of such aggregate structures vary depending on the crop being planted and the differences in soil characteristics and climatic conditions, the soil aggregates are generally not very regular in shape, different in appearance Round, flat, angular shapes can occur, but mainly belong to the near-round aggregates. From the quality point of view, the so-called water-stability of the structure, that is, the ability of the structure to resist the impulse of water, and the structural cohesion, that is, the ability to resist mechanical damage, are also different. If we follow the commonly used method of determining the stability of soil structure, we find that soil with this kind of structure is considered unstructured or single grain The soil is hard to grow. However, this view is not correct,