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              <h3 class="contents_title">土壤分析仪原理及应用</h3>
              <p class="actilecs">作者：托普云农　本文关键词：　日期：2022-8-31 13:28:08　人气：<span id="hits">90</span></p>
              <span style="color:#505050;font-family:Verdana, Arial, Helvetica, sans-serif;font-size:14px;line-height:22px;"><p><span style="font-size: 16px;">&nbsp; &nbsp; &nbsp; &nbsp;土壤分析对土壤学的发展有着很大的影响。因此需要<a href="http://www.tpturang.com" target="_self"><strong>土壤分析仪</strong></a>来测定土壤的各种化学成分的含量和某些性质。常见的测定项目有：土壤矿质全量测定，土壤活性硅、铝、铁、锰含量测定，土壤全氮、全磷和全钾含量的测定，土壤有效养分含量测定以及土壤的有机质含量的测定等。</span></p><p><span style="font-size: 16px;"><span style="font-size: 16px;">&nbsp; &nbsp; &nbsp; &nbsp;</span><strong><span style="font-size: 16px;">土壤分析仪</span>原理：</strong></span></p><p><span style="font-size: 16px;"><span style="font-size: 16px;">&nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-size: 16px;">土壤分析仪</span>主要检测土壤水分、土壤的含盐量、土壤的pH值、土壤的温度、土壤的电导率、土壤只能怪的各种养分的含量等等。那检测这些指标主要采用的原理是什么呢？</span></p><p><span style="font-size: 16px;"><span style="font-size: 16px;">&nbsp; &nbsp; &nbsp; &nbsp;</span>土壤分析仪主要用于分析土壤水分、土壤的含盐量、土壤的pH值、土壤的温度、土壤的电导率、土壤中的各种养分的含量等等。那分析这些指标一般采用的是电化学原理，通过离子之间化学反应及运动产生的电信号，称之为电化学原理。先由传感器发射高频信号，它通过测量被测介质的介电常数，并根据土壤容积含水率与土壤介电常数之问的非线性关系推算出土壤的容积含水率和重量含水率。因为水的介电常数比其它介质的介电常数高很多。因此土壤含水量发生变化时，介电常数同时发生变化，传感器的电容压值也随之变化。实时控制的数据采集器采集其变化量的大小，再通过线性化和定量化的数据处理，计算得出真实的土壤水分观测值，按规定的格式存储在采集器中。土壤分析仪在实际业务工作中由于土壤水分数据测量通常在户外进行因此更为方便。</span></p><p><span style="font-size: 16px;">　　测量土壤养分采用的原理相对较多，主要原理有：基于分光光度技术定量测试；滤光技术测量方法；采用反射计试纸交换法测量土壤养分；基于离子选择电极和场效应管设计的电子土壤测试仪；目前，相对测量准确的方法还是基于分光光度技术定量测试，土壤分析仪就是采用这种原理检测的。</span></p><p><span style="font-size: 16px;"><span style="font-size: 16px;"><span style="font-size: 16px;"><span style="font-size: 16px;">　　</span></span>土壤分析仪</span>在农业领域，土壤的好坏直接关系着植物是否正常生长，产量的高低。进而衍生出检测土壤的仪器。土壤分析仪就是专业检测土壤中重要参数的测定仪。土壤的重要参数主要包括：土壤水分、土壤的含盐量、土壤的pH值、土壤的温度、土壤的电导率、土壤中的各养分的含量等等。土壤分析仪结合了土壤水分、土壤的含盐量、土壤的pH值、土壤的温度、土壤的电导率这5种。土壤养分的每种离子含量的检测需要采用光学原理来检测，不能使用电极法，所以往往土壤分析仪来检测就是土壤中各种离子的含量，土壤中的中微量元素都可以检测。</span></p><p><br/></p></span></div>
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