水溶性有机质( dissolved organic matter，DOM) 是土壤和自然水体中一种重要的化学组分，虽然浓度不高，但活性强，能改变环境酸碱特性，影响微生物的活性...
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冻融交替明显增加土壤中水溶性有机质的含量。
It enhances the content of water soluble organic matter greatly.
在自然界中，一个气泡的寿命依赖于其所含可溶性有机质和纳米粒子的量，没有这些物质，气泡将迅速地缩减并消失。
In nature, a bubble's lifetime depends on the level of dissolved organic matter and nanoparticles, without which small bubbles rapidly shrink and disappear.
由于水溶性有机态硒及有机质的存在，准确测定土壤水溶性硒宜经浓缩、消化处理后进行。
As soil water extract contains much water-soluble organic selenium and organic matter, the determination of soil water-soluble selenium should be concentrated and digested beforehand.
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