HPV植物茎流传感�?植物液流�?参数-价格-中国粉体罐�/title>

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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><strong><span>HPV 茎流量传感器/Sap Flow Sensor</span></strong><strong></strong></p><p><span>HPV茎流量传感器是一款校准型、低成本的热脉冲液流传感器，</span><span>输出校准液流量、热速、茎水含量、茎温等</span><span>数据，功耗低，内置加热控制，同时改善了传统的加热方式，其原理采用</span><span>热脉冲速率泔�/span><span>＇�/span><span>HPV</span><span>（�/span><span>，测量范围：-200~+1000cm/hr(热流速度)�?100~+2000cm3/cm2/hr (茎流通量密度)，可广泛用于于茎流量监测、植物茎流蒸发计算、植物茎流蒸腾量、植物灌溉等</span></p><p><span>植物茎流是树木内部的</span>“水”运动，而蒸腾是从叶片通过光合作用蒸发流出的水分。树液流量和蒸腾量之间有很强的关联性，通常理解是同一回事。但是，严格地说，它们是不同的，这体现在它们是如何被测量的、�/span></p><p><span>SAP流量以L/hr（或每天、每周等）为单位进行测量。蒸腾量以每小时、每天、每星期等毫米（mm）为单位测量、�/span></p><p><span>蒸散野�/span>=蒸腾�?蒸发野�/span></p><p><span>蒸腾量以毫米为测量单位，可与降雨量以毫米计作比较。随着时间的推移，降雨量（水输入）应与蒸腾量（输出）相匹配。如果蒸腾作用更高，通常是树木作物的蒸腾作用，那么这种差异必须通过灌溉来弥补、�/span></p><p><span>蒸发量（</span>evaporation），</span><span>蒸发量是指在一定时段内＋�/span><span>由土壤或水中皃�/span><span>水分经蒸发而散布到空中的量</span><span>、�/span></p><p><span>1mm(降雨�?=1㎡地�?kg氳�/span></p><p><span>1mm(蒸腾�?=1㎡叶面积�?升树液流量（水）</span></p><p><span>例如：在果园和葡萄园等有管理的树木作物系统中，蒸发量与蒸腾量相比非常小。因此，为了简化测量，通常忽略蒸发量，将蒸腾量取为平均蒸散量（</span>ETo）、�/span></p><p></p><p><span>技术指栆�/span></p><p><span>测量范围９�/span><span>-200~+1000cm/hr(热流速度)</span></p><p><span>分辨率：</span>0.001cm/hr</span></p><p><span>准确度：</span>��0.1cm/hr</span></p><p><span>探针尺寸９�/span>��1.3mm*L30mm</span></p><p><span>温度位置：外</span>10mm，内20mm</span></p><p><span>针距９�/span>6mm</span></p><p><span>探针材质９�/span>316不锈钡�/span></p><p><span>温度范围９�/span>-30~+70ℂ�/span></p><p><span>响应时间９�/span>200ms</span></p><p><span>加热电阻９�/span>39���?00J/m</span></p><p><span>电源９�/span>12V DC</span></p><p><span>电流：空闱�/span>5mA� 测量<270mA</span></p><p><span>信号输出９�/span>SDI-12</span></p><p><span>线缆９�/span>5m，Max 60m</span></p><p><span>茎流量传感器参考文献：</span></p><p><span>1. Kim� H.K.; Park� J.; Hwang� I. Investigating water transport through the xylem network in vascular plants.</span></p><p><span>J. Exp. Bot. 2014� 65� 1895�?904. [CrossRef] [PubMed]</span></p><p><span>2. Steppe� K.; Vandegehuchte� M.W.; Tognetti� R.; Mencuccini� M. Sap flow as a key trait in the understanding of plant hydraulic functioning. Tree Physiol. 2015� 35� 341�?45. [CrossRef] [PubMed]</span></p><p><span>3. Vandegehuchte� M.W.; Steppe� K. Sap-flux density measurement methods: Working principles and</span></p><p><span>applicability. Funct. Plant Biol. 2013� 40� 213�?23. [CrossRef]</span></p><p><span>4. Marshall� D.C. Measurement of sap flow in conifers by heat transport. Plant Physiol. 1958 � 33� 385�?96.</span></p><p><span>[CrossRef] [PubMed]</span></p><p><span>5. Cohen� Y.; Fuchs� M.; Green� G.C. Improvement of the heat pulse method for determining sap flow in trees. Plant Cell Environ. 1981� 4� 391�?97. [CrossRef]</span></p><p><span>6. Green� S.R.; Clothier� B.; Jardine� B. 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