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  • 土壤肥料养分快速检测的方法
  • 本站编辑:四川华标测检测技术有限公司发布日期:2020-03-06 16:26 浏览次数:

土壤肥料养分如何速测? 

土壤肥料养分速测方法一般都会采用速测仪,速测仪可以检测土壤、植株、化学肥料、生物肥料等样品中的速效氮、速效磷、有效钾、全氮、全磷、全钾、有机质含量,腐殖酸的含量、土壤酸碱度及土壤含盐量等等指标。而且土壤速测仪检测时间短,费用低,最快可当天就出报告,所以速测仪十分适用现场肥料检测需求。

土壤检测

一、土壤肥料养分速测项目:

1、碱解氮、铵态氮、硝态氮、速效磷、速效钾、有机质、全氮、pH值、水份等九项;

2、中微量元素:硼、锰、铁、铜、钙、镁、硫、氯、硅、锌(酸性土)等十项。

3、单质化肥和复(混)合肥等中的氮、磷、钾及尿素中缩二脲;;

4、有机肥中速效氮、速效磷、速效钾、全氮、全磷、全钾、有机质。

5、植株养分:植株中的氮素、磷素、钾素;亚硝酸盐。

6、烟叶养分:干烟叶中的全氮、全磷、全钾、还原糖、水溶性总糖、硼、锰、铁、铜、钙、镁等项

二、土壤肥料养分速测步骤:

土壤采样—浸提—过滤—标准液—加试剂—静置反应-待测液上机检测-结果显示-出检测报告

环境影响评价

三、土壤肥料养分各指标检测方法:

碱解氮:简易蒸馏法取代碱解扩散法;测定时间由25小时缩短至1小时

有机质:重铬酸钾稀释热氧化比色法取代重铬酸钾稀释热氧化法,提高了测试速度,改善了便携性

铵态氮:研究解决助色剂、显色剂保值期短问题,测量范围增至120ug/ml

硝态氮:用乙二胺盐酸显色体系取代硝酸试粉法,解决硝态氮速测不稳定的问题

全氮:降低消化温度,简化蒸馏过程,提高测试效率

速效磷:采用传统的钼兰比色法,改进比色稳定性和试剂保质期,扩展了线性范围

速效钾:为适应联合浸提,开发新的掩蔽体系和操作规程,延长保质期

有效铁:采用邻啡咯啉比色,改变显色条件,提高效率

有效铜:浸提剂与国标相同,省去蒸干与高温灰化步骤,不用萃取,提高效率

有效硼:浸提剂与国标相同,用简易石英管代替冷凝器,不使用离心机,提高效率

有效锰:改变浸提剂和还原剂(酸性土),简化破坏有机质过程,提高分析效率

有效硫:采用比浊法,改变了浸提剂,缩短了浸提时间,简化有机质氧化步骤,效率提高2倍

有效氯:开发氯化银比浊法代替滴定法,改变浸提方法,简化操作难度,可与有效硫联合浸提

有效锌(酸性土):开发了双硫腙一次萃取比色,简化多次萃取反萃取过程,效率提高5倍

有效硅:采用硅钼蓝法

四、土壤肥料养分速测报告标签:检测日期、送检单位、样品编号,检测项目、样品含量、作物品种、肥料品种、施肥数量等

How to quickly measure the nutrient content of soil fertilizer? The method of quick measurement of soil and fertilizer nutrient content usually uses the quick measurement instrument, the instrument can measure the content of available nitrogen, available phosphorus, available potassium, total nitrogen, total phosphorus, total potassium and organic matter in soil, plant, chemical fertilizer and biological fertilizer, humic acid content, soil ph and soil salinity and other indicators. Moreover, the quick soil analyzer has the advantages of short testing time, low cost, and the earliest report can be made on the same day, so the quick soil analyzer is very suitable for field fertilizer testing. Soil testing I, soil fertilizer nutrient quick test items: 1, alkali-hydrolyzed Nitrogen, ammonium nitrogen, nitrate nitrogen, quick-acting Phosphorus, quick-acting Potassium, organic matter, total nitrogen, Ph value, water and so on nine items; 2. Micronutrient: Boron, Manganese, iron, copper, calcium, magnesium, sulfur, chlorine, silicon, zinc (acid soil) and so on. 3. Nitrogen, phosphorus, potassium in simple chemical fertilizer and compound (mixed) fertilizer and Biuret in urea; 4. quick-acting nitrogen, quick-acting Phosphorus, quick-acting potassium, total nitrogen, total phosphorus, total potassium and organic matter in organic fertilizer. 5. Plant nutrients: Nitrogen, phosphorus, potassium in the plant; Nitrite. 6. Nutrition of Tobacco Leaf: total nitrogen, total phosphorus, total potassium, reducing sugar, water-soluble sugar, Boron, manganese, iron, copper, calcium and magnesium in dry tobacco leaf. 2. Quick determination of nutrient content of soil fertilizer: soil sampling and leaching —— Filtration Standard Solution  The determination time was shortened from 25 hours to 1 hour for organic matter: the Potassium dichromate method was used to replace the potassium dichromate method, thus increasing the test speed, to improve the portable ammonium nitrogen: to solve the problem of short retention period of color promoter and color developing agent, the measuring range is increased to 120ug / ML nitrate nitrogen: to replace nitrate powder method with ethylenediamine hydrochloride color developing system, to solve the problem of unstable nitrate nitrogen rapid determination total nitrogen: reduce the digestion temperature, simplify the distillation process, improve the test efficiency available phosphorus: Using the traditional molybdenum blue colorimetry, improve colorimetric stability and reagent shelf life, the linear range of available potassium is extended: In order to adapt to the joint extraction, a new masking system and operating rules are developed to extend the shelf life of available iron: Using O-phen colorimetry, changing the color developing conditions to improve the efficiency of available copper: The extractant is the same as the national standard, no steam drying and high temperature ashing steps, no extraction, increase efficiency effective Boron: The extractant is the same as the national standard, the condenser is replaced by a simple quartz tube, no centrifuge is used, increase efficiency effective manganese: change the extractant and reducing agent (acid soil) , simplifying the process of destroying organic matter, improving the analysis efficiency effective sulfur: adopting turbidimetric method, changing the extractant, shortening the extraction time, simplifying the oxidation step of organic matter, improving the efficiency by 2 times effective chlorine: Developing the silver chloride turbidimetric method instead of titration method, changing the extraction method, simplifying the operation difficulty, can be combined with effective sulfur to extract effective zinc (acid soil) : dithizone extraction colorimetry has been developed to simplify the process of multiple extraction and back extraction, sILICON: silicon-molybdenum blue method 4. Quick Test Report Label of Soil Fertilizer: Test Date, unit, sample number, test item, sample content, crop variety, fertilizer variety, fertilizer quantity, etc.

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