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土壤水分和空气之间的协调是土壤肥力状况的重要标志,以往了解土壤这方面的性能,通常仅限于间接地分析和对比土壤水稳性团聚体的测定结果,然后作出可能的推论。但是,近来有不少的研究工作证明这是很不够的;不但在“水稳性”的标准上有不少异议,更重要的是仅仅分析土壤水稳性团聚体所得出的结果往往不符上壤肥力的实际情况,甚或违反普通常识,可靠性不够,这在我们最近的工作中(详见后)或其他文献上都可见到。在田间,有些熟化度低、物理性状不良的上壤,在短时间浸水情况下,其土壤团聚体表现得颇稳定,土壤水稳性团聚体的百分此相当高,而实际上土壤却缺乏或不具显著的调节水分与空气之间的关系,并使之协调的性能;如质地粘重的水稻土,铁质较多的红壤等。前华东农业科学研究所用
Coordination between soil moisture and air is an important indicator of soil fertility. In the past, the performance of soil in this respect was usually limited to indirectly analyzing and comparing the results of determination of soil water stable aggregates, and then made possible inferences. However, quite a few recent studies have proved that this is not enough. Not only are there many objections to the criterion of “water stability”, but more importantly, the analysis of soil water-stable aggregates often does not match the results The actual situation of soils and fertilizers, or even violation of common sense, is not sufficiently reliable, as can be seen in our recent work (detailed below) or in other documents. In the field, some soils with low ripening and poor physical properties showed relatively stable soil aggregates in short-term flooding, and the percentage of soil water-stable aggregates was quite high, while in fact, the soil was scarce Or not significantly regulate the relationship between water and air and make it coordinate the performance; such as the sticky texture of paddy soil, iron and more red soil. Former East China Agricultural Science Research Institute