欢迎您来到博普特科技官方网站!

土壤仪器电话

010-82794912

品质至上,客户至上,您的满意就是我们的目标

技术文章

当前位置:  首页 > 技术文章

Dualex植物多酚-叶绿素仪:三种便携式光学传感器在冬小麦氮素状况无损诊断中的应用

发表时间:2022-04-12 09:51:25点击:1348

来源:北京博普特科技有限公司

分享:

1649727327222968.png

Dualex便携式智能气象-叶绿素-花青素-黄酮醇测量仪

摘要

准确估计和及时诊断作物氮素状况有助于季节施肥管理。为了评估三个叶片和冠层光学传感器在无损诊断冬小麦氮素状况方面的性能,使用七个小麦品种和多种氮素处理(0–360 kg N ha−1)进行了三个试验,于2015年至2018年在中国江苏省进行。在主要生长期,分别使用两个叶片传感器(SPAD 502,Dualex 4 Scientific+)和一个冠层传感器(RapidSCAN CS-45)获取叶片和冠层光谱数据。同时测定了叶片氮浓度(LNC)、叶片氮积累(LNA)、植株氮浓度(PNC)、植株氮积累(PNA)和氮素营养指数(NNI)五个氮素指标。在每个生长阶段,建立了六个基于传感器的指数(叶片水平:SPAD、Chl、Flav、NBI、冠层水平:NDRE、NDVI)与五个N参数之间的关系。结果表明,基于Dualex的NBI在四个叶传感器指标中表现相对较好,而RS传感器的NDRE在不同生长阶段的五个N指标估计中,由于冠层传感器的采样面积较大,因此表现最好。NNI诊断模型的面积一致性范围为SPAD为0.54至0.71,NBI为0.66至0.84,NDRE为0.72至0.86,SPAD为0.30至0.52,NBI为0.42至0.72,NDRE为0.53至0.75。总的来说,这些结果揭示了基于传感器的诊断模型在快速、无损诊断N状态方面的潜力。

1649728241493770.png

关键词:氮指示剂;氮营养诊断;光学传感器;光谱指数 

Evaluation of Three Portable Optical Sensors for Non-Destructive Diagnosis of Nitrogen Status in Winter Wheat

Abstract

The accurate estimation and timely diagnosis of crop nitrogen (N) status can facilitate in-season fertilizer management. In order to evaluate the performance of three leaf and canopy optical sensors in non-destructively diagnosing winter wheat N status, three experiments using seven wheat cultivars and multi-N-treatments (0–360 kg N ha−1) were conducted in the Jiangsu province of China from 2015 to 2018. Two leaf sensors (SPAD 502, Dualex 4 Scientific+) and one canopy sensor (RapidSCAN CS-45) were used to obtain leaf and canopy spectral data, respectively, during the main growth period. Five N indicators (leaf N concentration (LNC), leaf N accumulation (LNA), plant N concentration (PNC), plant N accumulation (PNA), and N nutrition index (NNI)) were measured synchronously. The relationships between the six sensor-based indices (leaf level: SPAD, Chl, Flav, NBI, canopy level: NDRE, NDVI) and five N parameters were established at each growth stages. The results showed that the Dualex-based NBI performed relatively well among four leaf-sensor indices, while NDRE of RS sensor achieved a best performance due to larger sampling area of canopy sensor for five N indicators estimation across different growth stages. The areal agreement of the NNI diagnosis models ranged from 0.54 to 0.71 for SPAD, 0.66 to 0.84 for NBI, and 0.72 to 0.86 for NDRE, and the kappa coefficient ranged from 0.30 to 0.52 for SPAD, 0.42 to 0.72 for NBI, and 0.53 to 0.75 for NDRE across all growth stages. Overall, these results reveal the potential of sensor-based diagnosis models for the rapid and non-destructive diagnosis of N status.  

Keywords: nitrogen indicator; nitrogen nutrition diagnosis; optical sensor; spectral index

相关阅读

Dualex 便携式智能气象-叶绿素-花青素-黄酮醇测量仪

PESSL便携式便携式植物多酚-叶绿素仪原理

Dualex植物多酚-叶绿素仪:腐殖酸通过铁依赖和非铁依赖的协同机制缓解禾本科植物的铁失绿症

Dualex植物多酚-叶绿素仪:硝化抑制剂和/或间作效应下玉米(和小麦灌溉种植系统中的硝酸盐淋失

Dualex植物多酚-叶绿素仪:与保持绿色表达相关的叶片和冠层性状与对水分胁迫具有不同耐性的小麦基因型的产量构成密切相关

Dualex植物多酚-叶绿素仪:基于地面和智能传感器的冬小麦营养营养仪

Dualex植物多酚-叶绿素仪:增加角质层蜡沉积不会改变残余叶片蒸腾作用

Dualex植物多酚-叶绿素仪--氮平衡指数:不同生物刺激剂对水培生菜的效果比较

Dualex植物多酚-叶绿素仪:固体消化物和葡萄园冬季修剪堆肥替代苗圃中微繁殖高丛蓝莓生长基质中的泥炭研究

Dualex植物多酚-叶绿素仪:不同灌溉制度下根际细菌和藻类对金盏草生理生化指标的影响

Dualex植物多酚-叶绿素仪:Sentinel-2A与近端传感器数据协同提取水稻不同生育期生化参数

  • 土壤仪器品牌德国steps
  • 土壤仪器品牌奥地利PESSL
  • 土壤仪器品牌荷兰MACView
  • 土壤仪器品牌德国INNO_Concept
  • 土壤仪器品牌比利时WIWAM
  • 土壤仪器品牌德国GEFOMA
  • 土壤仪器品牌奥地利schaller
  • 土壤仪器品牌荷兰PhenoVation
  • 土壤仪器品牌法国Hi-phen系统
  • 土壤仪器品牌Videometer
  • 土壤仪器品牌比利时INDUCT(OCTINION)
  • 土壤仪器品牌美国EGC
  • 土壤仪器品牌HAIP
  • 土壤仪器品牌植物遗传资源学报