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在土壤水分和溶质运动研究中,常推荐使用整段标本。钻孔法采集这种标本(直径为0.295m,长为1.0,0.5或0.3m),对土壤的扰动最小。钻头由内插塑料套管和底部安装4个切割齿的圆柱钢筒组成。钻筒围绕塑料套管旋转,切出一个土柱,再利用极小液压把塑料套管压入。该项技术在土壤学研究中广泛地使用,包括水分性质测定,土壤蒸发和土壤通气性研究。本文介绍一种应用方式。在种植大麦(Hordeum vulgave L.,)咸牛尾草(Festuca pratensr’s Hudson)的地块上,整段标本用作田间渗漏计。六个月期间,草地渗漏计的渗出水总量很低(为106,而大麦为2131,而且渗漏水中硝酸盐浓度也低于平均水平(<0.1mgNL~(-1),大麦为9.3mgNL~(-1))。各重复的一致性和两个处理间的较大差异,为应用此项技术提供了间接证据,即侧壁渗透的影响不大。
In the study of soil moisture and solute movement, it is often recommended to use the entire specimen. Drilling method to collect such specimens (diameter of 0.295m, length 1.0, 0.5 or 0.3m), the smallest disturbance to the soil. The drill bit consists of an insert plastic sleeve and a cylindrical steel cylinder with 4 cutting teeth on the bottom. Drill pipe around the plastic casing rotation, cut a soil column, and then use a very small hydraulic pressure plastic casing into. The technology is widely used in soil science research, including the determination of water properties, soil evaporation and soil aeration research. This article describes an application. On the plot of Hordeum vulgave L., Festuca pratensr’s Hudson, the entire specimen was used as a field leak meter. During the six-month period, the total amount of seepage water from the grass seepage meter was very low (106 compared to 2131 for barley and the nitrate concentration in leachate was below average (<0.1 mgNL -1) and barley was 9.3mgNL ~ (-1)). The consistency of the repeats and the large difference between the two treatments provided indirect evidence for the application of this technique, ie, the effect of sidewall infiltration was insignificant.