三种土壤含水量测定方法的比较

K. Little, B. Metelerkamp, C. Smith
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引用次数: 16

摘要

在林业方面,需要在特定地点的可持续基础上管理人工林,这就要求了解和管理任何生长限制因素。土壤水分状况被认为是解释树木生长差异的最重要因素。在研究中,土壤含水量的测量是定期进行的,由于盗窃和破坏,土壤水分传感设备通常不能留在现场。因此,必须找到其他快速测定土壤含水量的方法。将ThetaProbe和Speedy Moisture Tester作为土壤顶部10厘米土壤含水量测定的替代方法,与传统的重量测定方法进行了比较。这些方法在夸祖鲁-纳塔尔省两种对比土壤上进行了粘土含量、有机碳含量和土壤含水量的试验。用回归分析比较了两种不同的方法,并以重量法为参考,结果表明,两种方法对土壤的影响是相似的。
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A comparison of three methods of soil water content determination
In forestry the need to manage plantations on a sustainable site-specific basis requires the understanding and management of any growth limiting factors. Soil water regime is a factor considered to be of prime importance with respect to explaining differences in tree growth. In research studies measurement of soil water content is carried out on a regular basis and due to theft and vandalism, soil water sensing equipment cannot usually be left on site. Other rapid methods to determine soil water content therefore have to be found. The ThetaProbe and Speedy Moisture Tester were compared as alternative measures of soil water content determination in the top 10 cm of the soil to the more traditional gravimetric method. These methods were tested in KwaZulu-Natal on two contrasting soils in terms of clay content, organic carbon content and soil water content. Regression analysis performed to compare the two different methods with the gravimetric method as a reference, indicated that they were similar on a soil...
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