Evaluation of the correlations between the normalized difference vegetation index (NDVI) and yield in a seasoning paprika (Capsicum annuum L. var. longum) stand
Abstract:The aim of our examination was to evaluate the correlations between the normalized difference vegetation index (NDVI) and yield, as well as to examine the possibility of yield estimation basedon NDVI in a seasoning paprika population.
Significant correlations were observed during the examination of the correlation between NDVI and yield. Furthermore, it was concluded that yield can be estimated with a 6.6–8.3% mean error based on the regression equations. No significant difference was shown between the e… Show more
“…1 ), [ 15 ]. Generally, sustaining the superior yield of maize and other crops requires fertile arable land and plant fertilization [ 142 , 144 ], nutrition and nitrogen application [ 140 , 143 , 144 ], irrigation and water supply [ 140 , 144 , 145 ], favourable weather and climatic conditions [ 16 , 146 ], judicious use of agrotechnical inputs and continuous research to develop new innovations. Fig.…”
“…1 ), [ 15 ]. Generally, sustaining the superior yield of maize and other crops requires fertile arable land and plant fertilization [ 142 , 144 ], nutrition and nitrogen application [ 140 , 143 , 144 ], irrigation and water supply [ 140 , 144 , 145 ], favourable weather and climatic conditions [ 16 , 146 ], judicious use of agrotechnical inputs and continuous research to develop new innovations. Fig.…”
“…Every technological element used during the cultivation, which improves the physical conditions of the plant, can subserve the tolerance of the plant against biotic and abiotic stress factors. It is necessary to emphasize the monitoring of the physical conditions of the plants, as stress resilience can negatively affect the quality and the quantity of the yield (Dobos et al 2014). We can get information about the physical condition of the crops from their chlorophyll content (Carter 1994), which can be detected with many instruments, nowadays.…”
The main goal of our investigation was to determine the relationship between different growing methods of sweet corn seedlings and some physiological and morphological parameters of four hybrids in order to get information about the ability of their stress tolerance in a two-year experiment (2019, 2020). Seedlings were grown with and without pre-conditioning. Pre-conditioning is based on growing young plants exposing them to cold stress. Seedling emergence percentage, plant height, total leaf number, the total mass of fresh aboveground biomass, and ear length were determined as well as Soil Plant Analysis Development (SPAD) and Normalized Difference Vegetation Index (NDVI) values. In 2019, the pre-conditioned seedlings were more tolerant to cold stress for most of the tested parameters. Overall, the SPAD and NDVI values of the pre-conditioned seedlings were considered better in both years, however, it was not verified for all the studied hybrids. Among the hybrids, ‘Strongstar’ had the highest benefit from pre-conditioning compared to the standard growing method in terms of resulting in 17.5% higher plants, 13.1% longer ears, and 10.4% higher SPAD values in 2019. In 2020, when the cold stress was not so dominant, ‘Gyöngyhajnal’ gained the most from pre-conditioning with 9.7% higher plants, 32% more fresh aboveground biomass, 6.8% longer ears, 3.6% higher SPAD, and 9.3% higher NDVI values. More emphasis should be placed on the choice of stress-tolerant hybrids as well as on the seedling growing method and the date of transplanting to improve adaptation to the more frequent weather extremes.
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