Normalized difference vegetation index, and K⁺ in stem sap of potato plants (Group Andigenum) as affected by fertilization

Abstract

Remote sensors permit forecasting the nutrient status and yields in crops of economic importance in Colombia. The objective of this study was to determine the relationships between normalized difference vegetation index (NDVI) and yield as well as concentrations of ${\rm {N - NO}}_3^ - $ and K+ in stem sap of potato cultivars Diacol Capiro and Pastusa Suprema (Solanum tuberosum L., Group Andigenum) in relation to different fertilizer rates. Increasing doses (0, 1450, 1900 and 2375 kg ha–1) of macro- and micronutrient fertilizers were applied to determine NDVI behavior at 55, 75, 100, 125 and 150 days after planting. For Capiro, significant differences in NDVI readings (0.84–0.88) were found between phenological stages. In both cultivars, NDVI correlated positively with yield and K+ concentrations in stem sap during tuber filling and maturation, while in Capiro no correlation was established between NDVI values and ${\rm {N - NO}}_3^ - $ concentrations in stem sap. The NDVI readings could be used to forecast productivity and K status in potato Group Andigenum.

Effect of nutrient solution concentrations on the growth and yield of potato (Solanum tuberosum L.) varieties grown from apical rooted cutting in a hydroponic system

“…The NDVI values increased with maturity up to a maximum on the 60 th DAP and declined afterwards up to the dehaulming stage (75 DAP). This was similarly reported by Gómez et al (2019) who noted that NDVI values in potato production were highest at 75 DAP and declined with the onset of senescence for late maturing varieties. Increase in NSSC significantly (p<0.05) increased NDVI values with N75, N100 and N125 giving a mean of 0.42, 0.46 and 0.62 at 60 DAP, respectively.…”

Effect of nutrient stock solutions on the growth and yield of apical rooted cutting (Solanum tuberosum L.) varieties in a hydroponic system

“…2). This was similarly reported by Gómez et al (2019) who noted that NDVI values in potato production were highest at the peak of owering and declined with the onset of senescence. Potato ARCs supplied with N75 (75% NSSC), experienced inadequate nutrient supply and the crops consequently exhausted any nutrients in the rhizosphere leading to low vegetation growth Maboko et al (2017) as compared to crops supplied with N100 and N125 NSSC which resulted in better growth and healthier crop.…”

Estimation of Water Stress in Potato Plants Using Hyperspectral Imagery and Machine Learning Algorithms

“…The experiment consisted of a randomized complete blocks design in a factorial 2 × 4 arrangement. The first factor considered was the level of plant development (phenological stage), this was fixed according to [17]: tubers differentiation (TD) and maximum tuberization (MT) (Appendix A). The second factor was the level of water stress severity, determined by the hydric potential of the leaves, measured using a Scholander pressure chamber in Mega Pascals (Mpa).…”