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用途：PlantPen系列植物PRI & NDVI計(jì)是一款小巧的快速測量植物反射光譜指數(shù)的野外便攜式儀器，可根據(jù)反射系數(shù)確定植物特征。通過各種反射系數(shù)可以評定葉綠素含量，和其他重要的特征。有兩個(gè)標(biāo)準(zhǔn)版本光化學(xué)反射系數(shù)（Photochemical Reflectance Index，PRI）和歸一化植被指數(shù)（Normalized Difference Vegetation Index，NDVI）。整合了藍(lán)牙技術(shù)（藍(lán)牙模塊或USB軟件狗），F(xiàn)luorPen 1.1軟件提供可視化操作和數(shù)據(jù)傳輸?shù)絇C上。根據(jù)用戶需要，還可提供定制服務(wù)。
兩種標(biāo)準(zhǔn)版本：
■PRI 210植物光化學(xué)反射系數(shù)計(jì)：在531nm~570nm波段之間測定葉反射系數(shù)。該參數(shù)對類胡蘿卜素極為敏感，反應(yīng)植物的光合作用中的光能利用效率和CO2同化速率，并可作為植物水脅迫的可靠指數(shù)。因此廣泛用于植物產(chǎn)量和脅迫研究。
■NDVI 310植物歸一化植被指數(shù)計(jì)：用來測定NDVI（一種植物體葉綠素重要的指標(biāo)），在660nm~740nm波長處比較反射光。葉綠素會(huì)強(qiáng)烈吸收紅光用于光合作用，而葉片細(xì)胞結(jié)構(gòu)會(huì)強(qiáng)烈反射近紅外光。因此，NDVI與光合能力直接相關(guān)，從而反映植物冠層的能量吸收狀況。
應(yīng)用領(lǐng)域：
快速測量葉綠素含量
植物光合研究
早期脅迫檢測
氮素利用效率研究
功能特點(diǎn)：
攜帶方便、操作簡單。
直接無損測量得到NDVI和PRI值。
內(nèi)置藍(lán)牙與USB雙通訊模塊，GPS模塊，輸出帶時(shí)間戳的地理位置
軟件可導(dǎo)出數(shù)據(jù)為Excel格式，具備實(shí)時(shí)控制和遙控功能。
可用于農(nóng)業(yè)、林業(yè)以及植物學(xué)中光合作用、逆境脅迫等的研究和教學(xué)。
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技術(shù)參數(shù)：
| 測量參數(shù) | PRI（光化學(xué)反射指數(shù)）=（R531-R570）/（R531 + R570）參考：Sellers等。（1985） NDVI（歸一化差異營養(yǎng)指數(shù)）=（R740-R660）/（R740 + R660）參考文獻(xiàn)：Rouse等。（1974年） |
| 測量光 | PRI 210：內(nèi)部雙波長光源R531 = 531nm，R570 = 570nm NDVI 310：內(nèi)部雙波長光源VIS = 635nm，NIR = 760nm |
| 探測波長范圍 | PRI 210： 500-600 nm; NDVI 310：620-750 nm |
| 軟件適用系統(tǒng) | Win7及以上 |
| 樣品夾 | 機(jī)械式葉夾 |
| Bios | 可升級固件 |
| 存儲(chǔ)容量 | 16M |
| 通訊模式 | USB或藍(lán)牙 |
| 內(nèi)部數(shù)據(jù)采集 | 100,000個(gè) |
| 顯示 | 圖形顯示 |
| 鍵盤 | 密封防水設(shè)計(jì)2鍵 |
| 自動(dòng)關(guān)機(jī) | 無操作5分鐘后 |
| 節(jié)電模式 | 自動(dòng)休眠 |
| 電源 | 可充電鋰電池 |
| 充電方式 | USB充電 |
| 電池容量 | 2000 mAh |
| 充電電流 | 0.5 A |
| 電池壽命 | 連續(xù)工作70小時(shí) |
| 低電探測 | 顯示低電量報(bào)警 |
| 尺寸 | 135x 65 x 33 mm |
| 重量 | 188g |
| 工作環(huán)境 | 溫度0-55℃，濕度0-95%非冷凝環(huán)境 |
| 存儲(chǔ)環(huán)境 | 溫度-10~60℃，濕度0-95%非冷凝環(huán)境 |
產(chǎn)地：捷克
PlantPen 手持式植被指數(shù)測量儀參考文獻(xiàn)列表
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DOI: 10.4322/nematoda.01515
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