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威廉斯认为团粒结构是土壤肥力的条件,只有水稳性团粒在80％以上,才能表现出有结构土壤的特性。有些人对新疆土壤是否具有水稳性团粒有怀疑,对以团粒作为土壤肥力的物理性指标之一,也有不同的评价。他们认为新疆土壤主要以创造良好的耕层构造为主。我们认为团粒结构就是最良好的耕层结构,随着团粒含量的增加,耕层构造就一步改善,而且出现了高度的持久性。 我们在北疆几个土壤的测定过程中,肯定了在部分都具有水稳性团粒,其含量与土壤有机质含量有直接的、密切的关系。(表1)
Williams believes that the aggregate structure is the soil fertility conditions, only water-stable aggregates in more than 80%, in order to show the characteristics of structured soils. Some people have doubts about whether soil in Xinjiang has water-stable aggregates or not. There are also different evaluations on the use of aggregates as one of the physical indicators of soil fertility. They think that the soil in Xinjiang is mainly dominated by the creation of good tillage structures. We believe that the aggregate structure is the best plow structure. With the increase of the aggregate content, the structure of the plow layer is improved step by step, and there is a high degree of persistence. In the course of the determination of several soils in the northern part of the country, we affirmed that there are water-stable aggregates in some of the soils. The contents of them are directly and closely related to the content of soil organic matter. (Table 1)