Reflectance and fluorescence sensors to assess nitrogen levels, biomass production and yield of cotton
Rossato, OB; Andrade-Sanchez, P; Sebastiao Guerra, SP; Costa Crusciol, CA
| HERO ID | 1565180 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Reflectance and fluorescence sensors to assess nitrogen levels, biomass production and yield of cotton |
| Authors | Rossato, OB; Andrade-Sanchez, P; Sebastiao Guerra, SP; Costa Crusciol, CA |
| Journal | Pesquisa Agropecuaria Brasileira |
| Volume | 47 |
| Issue | 8 |
| Page Numbers | 1133-1141 |
| Abstract | The objective of this work was to evaluate the potential of using reflectance and fluorescence sensors to assess the levels of N-NO3- in the petiole, plant biomass production and yield of cotton. A randomized complete block design was used in a 3x4 factorial arrangement, with four replicates. Treatments consisted of three cotton varieties (ST- 4288-B2RF, ST-4498-B2RF and DP-164-B2RF) and of four N rates (0, 45, 90 and 135 kg ha(-1)). At 120 days after sowing, readings were done with optical sensors for canopy fluorescence and reflectance. There were no significant correlations for N-NO3- in the petiole with the reflectance sensor indices; however, there was correlation to biomass production (0.39) and yield (0.32 to 0.41). The fluorescence sensor indices were significantly correlated to N-NO3- in the petiole (0.34 to 0.61), biomass production (0.30 to 0.53) and yield (0.34). Compared to the reflectance indices, the fluorescence ones have a greater ability to assess the levels of N-NO3- in the petiole, a similar ability to detect variation of plant biomass, and a lower ability to detect the variation in cotton yield when increasing rates of nitrogen are applied. |
| Wosid | WOS:000310089400014 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000310089400014 |
| Is Public | Yes |
| Keyword | Gossypium; precision agriculture; nutritional status; vegetation indices; NDVI; remote sensing |