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一、前言 土壤结构性与土壤肥力有着密切的联系,因而在一般研究中都把土壤结构性的测定作为一项重要的内容。在实际工作中,我们感到如何掌握土壤结构性的研究方法,使之更好地说明土壤肥力,尚存在不少问题。1956—1957年在安徽宿县工作期间,对于以下的几个问题作了初步探讨:(1)测定土壤水稳性团粒的数量及分配,现时广泛应用以提出的湿筛法为基础的一些修正方法,如法和Yoder法等。这些方法中有的主张采用自然湿润土样供分析用,而有的则主张将土样风干后再行分析;而样品在进行湿筛前是否预行毛管吸水以及吸水时间的长短,各家也都不同。我们想本着既可靠又简便的原则,把方法比较确定一下。(2)在分析结果的应用上,也存在着分歧,最通行的意见是以大于0.25毫米的水稳性团粒总量占全部上重的百分数以及各级大小的水
I. INTRODUCTION The relationship between soil structure and soil fertility is closely linked. Therefore, the determination of soil structure has been taken as an important part of the general research. In practical work, we feel how to grasp the structural research methods of soil to make it better explain the fertility of soil, there are still many problems. During the period of 1956-1957 in Suxian, Anhui Province, preliminary discussions were made on the following issues: (1) The determination of the quantity and distribution of soil water-stable aggregates, and the wide application of some amendments based on the proposed wet sieving method Methods such as method and Yoder method. Some of these methods advocate the use of natural wet soil samples for analysis, while others advocate that the soil samples should be dried before analysis. Whether the sample pre-wet capillary suction and the length of the water absorption time are also required by each method all different. We want to compare the methods in a reliable and simple way. (2) There are also differences in the application of the analytical results. The most common view is that the total amount of water-stable aggregates larger than 0.25 mm, the percentage of the total weight, and the water at all levels