GB/T 17420-2020 in English

VALID

Foliar microelement fertilizer

Issued on:2020-11-19
Implemented on:2021-06-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $120.00
$117.00

Standard No:	GB/T 17420-2020
Document status:	VALID
Title in English:	Foliar microelement fertilizer
Title in Chinese:	微量元素叶面肥料
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-11-19
Implemented on:	2021-06-01
Superseding:	GB/T 17420-1998 Foliar microelement fertilizer
ICS Classification:	65.080-Fertilizers
Chinese Classification:	G21-Chemical fertilizer and chemical soil conditioner
Professional Classification:	GB-National Standard
Related Keywords:	foliar fertilizer foliar fertilizer technology foliar microelement fertilizer introduction background trace element foliar fertilizers foliar
Related Topics:	trace elements Fertilizer Standard new element Trace element analysis results Element distribution measurement ts+ element trace non-metallic elements other trace elements ts element and ts+element ts+element+ Major and trace element analysis Trace element analysis experiment Organic Trace Nitrogen Analysis of major and trace elements trace element solution Trace element spectrum Trace + a small amount + ultra-trace element english adjacent element elements of steel Element Molecular Weight iec+element Trace element quintile Trace metal element detection Leaf meter Analysis of major and trace elements What are trace metal elements used for? trace element solution Benzene Trace metal element detection as element as element deuterium trace element How to detect trace elements Detection of trace elements Foliar fertilizer icpms trace elements Trace element meter Measuring trace elements in water Trace element meter Element semi-quantitative mo element mo element Surface element distribution eds element element german elements element Elemental Impurity Microwave metasystem element trace heavy metal elements semi-quantitative elements elemental surface energy iec+ element Trace zirconium element measurement Trace element detection aluminum Determination of trace element rubidium Elemental Reagent Micro feeder be trace elements Quantity element Determination of Plant Trace Elements Three items of trace elements Trace element technology fuel element trace element icp in fertilizer Trace Chlorine ICPMS+ trace elements Leaf oxytocin test material element Measure element method metasystem element oxytocin element concentration element A trace element analysis Elemental Surface Analysis foliar fertilizer Elemental analysis of trace substances Trace element mass spectrometry be element v+ element Supplementary trace elements Analysis of Trace Substances and Elements Trace element spectrum be element 6 trace element tests fluorescent trace elements Detection of trace elements How to supplement trace elements About trace element detection sample trace elements Supplementary trace elements Domestic trace element detection industry Trace element lead 56 Trace element lead 47 Trace elements bar How to supplement the trace element zinc The trace element cadmium is high Trace element processing Trace element results Element Oxygen New trace elements Trace elements are important Chromium Determination of trace elements High-efficiency trace elements Manganese trace element 4 trace elements Trace element detection has been trace element flame method Trace Sulfur Contains organic foliar fertilizers element co element trace element dimension Elemental electron energy trace element cu Measuring trace elements Major Trace Elements Test trace elements today Trace sample elemental analysis trace nitrogen Chromium Trace element standard by trace elements Arsenic trace element 3 trace elements About the detection of trace elements How to detect trace elements element face trace elements How to test trace elements How to detect trace elements Trace elements tested yesterday Trace element analysis experiment Trace element cadmium 0 Foliar Cadmium Elemental oxygen measurement Detection of trace elements trace nitrogen Element voltage How about plant trace elements Rubidium Determination of elements in aluminum trace element aluminum element wood element element Analysis of Trace Organic Elements trace element tracer How to detect trace elements Trace element series Elemental Trace Element Absorption Sulfur element system element element Element Energy Spectrum molecular weight element /quantity element Quantity element future trace elements Element Molecular Weight 9 trace elements Trace element analysis results Leaf Area Batch element face elemental surface energy icpms trace elements Trace elements and trace elements four trace elements GBT17420 GBT17420-1998 GB/T 17420-2020 trace element spectroscopy fertilizer microelement Organic matter trace chlorine element Als elements Medium and trace elements execution Metal Trace Elements Execution Detection of trace elements in fertilizers Rock trace element testing Trace element analyzer Trace elements abroad element Registration of medium and trace elements Feed trace element limits trace element fertilizer trace element execution Trace element analysis of hard carbon materials Specifications for trace element detection Comparison of trace element methodologies Trace element calibration Microplastic metering Trace element standardization

《GB/T 17420-2020微量元素叶面肥料》由TC105（全国肥料和土壤调理剂标准化技术委员会）归口，TC105SC5（全国肥料和土壤调理剂标准化技术委员会新型肥料分会）执行，主管部门为中国石油和化学工业联合会。

Introduction

Background of Standard Revision and Technological Evolution

GB/T 17420-2020, as the third edition of the national standard for trace element foliar fertilizers, reflects the three major advances in my country's foliar fertilizer technology in the past 20 years:

Technical Dimensions 1998 Edition 2020 Edition Significance of Progress

Detection Method Traditional Chemical Analysis Method Atomic Absorption Spectroscopy + Plasma Emission Spectroscopy Accuracy Improved 10 Times

Safety Indicators Unspecified Limits Citing GB 38400 standard Stricter control of heavy metals

Packaging specifications Single specification Multiple specifications ±1% error Adapt to the needs of modern agriculture

Analysis of key technical indicators

The standard stipulates that trace element foliar fertilizer must contain at least two elements of iron (Fe), manganese (Mn), copper (Cu), zinc (Zn), molybdenum (Mo) and boron (B), and:

Total trace element content of solid products ≥10.0%

Liquid products ≥100g/L

Single element content <0.2% is not included in the total

Application case: Correction of nutrient deficiency in citrus

Using the zinc-boron compound foliar fertilizer that complies with GB/T 17420, after spraying it three times during the flowering period, the fruit setting rate of Wenzhou mandarin oranges increased by 27% and the horizontal diameter of the fruit increased by 1.2cm.

Key points for upgrading the detection method

The new version of the standard specifies in Chapter 5.4:

Atomic absorption spectrophotometry (arbitration method) is used for copper/iron/manganese/zinc

Plasma emission spectrometry is used for boron/molybdenum

Newly added sample solution oscillation preparation specification: (180±20)r/min oscillation for 30min

Implementation suggestions and precautions

Links Operation specifications Common misunderstandings

Purchasing Check whether the value marked on the packaging meets Article 3.2 Ignore the requirement of ≥0.2% of a single element

Storage Liquid products should avoid stratification (Article 3.1) Failure to check sedimentation regularly

Use Dilute 250 times according to Article 7.3 Randomly increasing the concentration will lead to fertilizer damage

Special note: The 2020 version of the new GB 38400 Limits of Toxic and Hazardous Substances requires that the cadmium (Cd) content must be ≤10mg/kg.

More samples: GB 18306-2015 YD/T 3934-2021 QC/T 942-2021

Sample only — not a preview of GB/T 17420-2020

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Technical Dimensions	1998 Edition	2020 Edition	Significance of Progress
Detection Method	Traditional Chemical Analysis Method	Atomic Absorption Spectroscopy + Plasma Emission Spectroscopy	Accuracy Improved 10 Times
Safety Indicators	Unspecified Limits	Citing GB 38400 standard	Stricter control of heavy metals
Packaging specifications	Single specification	Multiple specifications ±1% error	Adapt to the needs of modern agriculture

Links	Operation specifications	Common misunderstandings
Purchasing	Check whether the value marked on the packaging meets Article 3.2	Ignore the requirement of ≥0.2% of a single element
Storage	Liquid products should avoid stratification (Article 3.1)	Failure to check sedimentation regularly
Use	Dilute 250 times according to Article 7.3	Randomly increasing the concentration will lead to fertilizer damage