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Chlorophyll Meter (葉綠素儀)

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  • 公司名稱石家莊泛勝科技有限公司
  • 品       牌
  • 型       號
  • 所  在  地
  • 廠商性質(zhì)其他
  • 更新時間2023/5/11 9:21:02
  • 訪問次數(shù)237
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石家莊泛勝科技有限公司坐落于河北石家莊市,注冊資金100萬元。是一家專業(yè)的農(nóng)林科研儀器儀表研制、生產(chǎn)、銷售、服務(wù)于一體的。公司主要服務(wù)于各級各類農(nóng)林科研、高校、園林、測繪及其他的農(nóng)林類生產(chǎn)、服務(wù)、監(jiān)督機構(gòu)。石家莊泛勝科技有限公司秉承推進中國生態(tài)環(huán)境改善、中國農(nóng)業(yè)高效、綠色、健康發(fā)展的理念,致力于植物生理生態(tài)、林業(yè)、環(huán)境氣象、土壤、種子等相關(guān)農(nóng)林檢測儀器的研發(fā)生產(chǎn)及銷售。企業(yè)自創(chuàng)建以來,堅持走科技研發(fā),服務(wù)創(chuàng)新之路,與河北科技大學(xué)、河北師范大學(xué)、河北工程技術(shù)學(xué)院相繼建立了產(chǎn)、學(xué)、研聯(lián)盟基地,引進多項技術(shù),具備為科研機構(gòu)提供試驗儀器和為農(nóng)林生產(chǎn)單位提供監(jiān)測試驗的整體解決方案及專業(yè)化服務(wù)的能力。公司堅持質(zhì)量回訪,對每一臺銷售的儀器負責(zé)技術(shù)培訓(xùn),答疑解惑,保修維修等售后服務(wù)活動,深受用戶信賴。業(yè)精于專一,功成于勤奮,我們將進一步集中公司和高等院校的科研優(yōu)勢,以更加*的產(chǎn)品,過硬的質(zhì)量,優(yōu)惠的價格,全面的服務(wù)來贏得您的光顧。 公司以誠信為本,服務(wù)至上,開拓進取,努力創(chuàng)新的經(jīng)營理念來市場。我們相信,通過我們的不斷努力和追求,用我們的專業(yè)化服務(wù)幫助客戶創(chuàng)造更高的價值,必定與客戶實現(xiàn)雙贏。
ChlorophyllMeter(葉綠素儀英文版)Ⅰ
Chlorophyll Meter (葉綠素儀) 產(chǎn)品信息

Chlorophyll Meter (葉綠素儀英文版)

Ⅰ. Introduction
Chlorophyll plays a crucial role in the photosynthesis of plants. Its content is an important indicator of plant nutrition stress, photosynthetic capacity, and growth conditions. Chlorophyll content measurement can be used to monitor the growth and development conditions of plants, thereby making scientific guidance of ction, fertilization and management, ensuring the good growth vigor, and enhancing crop quality and yield. As a result, it is of great significance for precision agriculture and forestry.
The chlorophyll meter is able to measure the relative content of chlorophyll in plant leaves (unit SPAD) or “greenness”, thereby learning plants’ actual demands on nitryl and helping the user identify the shortage of nitryl in soil or whether nitrogenous fertilizer has been applied excessively. This meter can be used to enhance the utilization ratio of nitrogenous fertilizer and protect the environment.


Ⅱ. Operating Principle
Traditionally, chlorophyll content is measured using chemical methods, which not only time and energy-consuming and harmful to plants. With the development of spectrum technology, it has been a research focus to make quick noninvasive diagnosis using spectrum technology in precision agriculture. Spectrum technology is one that describes the information contained in spectrum data by means of the relationship between spectrum response and wavelength of the target. Spectrum characteristics of plants present the changes of light absorption, transmission and reflection of plants caused by their physiological features. Therefore, the physiological information of plants can be extracted by means of spectrum monitoring. The principle of spectrum-based crop physiological information detection is that changes of plant leaf color, thickness and morphology are subject to the influence of the changes of plant physiological information, thereby leading to varied spectrum absorption, reflection, and transmission features. For example, the spectrum monitoring of plant nitrogen nutrition is made by detecting different reflecting, absorption, and transmission spectra caused by different absorption and reflection of light of certain wavelengths due to the vibration response of chemical bonds of molecules of various proteins, amino acids, chloroplasts, and other nitrogen forms at a certain radiation level (different frequencies or wavelengths). When it is specific to chlorophyll, the spectrum absorption of chlorophyll is that the absorption peaks lie in the blue and red spectral regions while the absorption valleys lie in green spectral region. There is barely absorption near the red spectral region. When light reaches the leaf, some will be absorbed by chlorophyll, some will be reflected, with a small part penetrating the leaf. The relative chlorophyll content within the leaf can be worked out by measuring the light intensity penetrating the leaf, making A/D conversion, and processing data using the micro-processing unit.


Ⅲ. Measurement Principle and Steps
1. Measurement Principle
The two LED light sources emit two types of lights—red light (peak wavelength: 650nm) and infrared light (940nm), bot of which penetrate the leaf and reach the receiver. Next, light signals are converted into analog signals that are amplified by the amplifier and are then converted into digital signals by analog/digital converter. Digital signals are processed by the micro-processing unit to calculate SPAD, which is then displayed on the LCD.
2. Calibration and Calculation of Measured Value
(1) The indenter does not clamp the sample during calibration. The two LED lights are on in turn. The light received is converted into electrical signals. And the ratio of light intensity is used for calculation.
(2) When the sample is clamped by the indenter, the two LED lights are on again. Light that penetrates the leaf reaches the receiver, by which it is converted into electrical signals. And the ratio of transmitted light intensity is used for calculation.
(3) Values obtained in steps 1 and 2 are used to calculate SPAD, which signifies the relative chlorophyll content of leaf sample currently clamped.


Ⅳ. Major Technical Indicators
1.Measurement range      0.0-99.9SPAD
2.Measurement area       2mm*2mm
3.Measurement precision    within ±1.0 SPAD unit (SPAD is between 0-50)
4.Repeatability            within ±0.3 SPAD unit (SPAD is between 0-50)
5.Measurement interval      <3s
6.Date storage              SD card
7.Data storage capacity       2GB
8.Power                   4.2V rechargeable lithium battery
9.Battery capacity           2000mah

關(guān)鍵詞:葉綠素儀
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