Effect of Cultivar on Chlorophyll Meter and Canopy Reflectance Measurements in Cucumber.

ABSTRACT: Optical sensors can be used to assess crop N status to assist with N fertilizer management. Differences between cultivars may affect optical sensor measurement. Cultivar effects on measurements made with the SPAD-502 (Soil Plant Analysis Development) meter and the MC-100 (Chlorophyll Concentration Meter), and of several vegetation indices measured with the Crop Circle ACS470 canopy reflectance sensor, were assessed. A cucumber (Cucumis sativus L.) crop was grown in a greenhouse, with three cultivars. Each cultivar received three N treatments, of increasing N concentration, being deficient (N1), sufficient (N2) and excessive (N3). There were significant differences between cultivars in the measurements made with both chlorophyll meters, particularly when N supply was sufficient and excessiv

SUBMITTER: de Souza R 

PROVIDER: S-EPMC7014412 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature