Abstract
Paprika is an extremely popular and widespread plant species in Hungary. Chili peppers belongs to paprika and it can be consumed fresh or processed. The production of peppers began with the cultivation and control of some parameters for good results of paprika production. The aim of this article is to compare the water supply of four chili pepper hybrids ("Habanero", "Hetényi Parázs", "Unikal" and "Unijol") by means of investigation on open field and to examine how different temperatures and water stress factors influence the yield of chili peppers. The experiment area consisted of four different hybrids in three different irrigation treatments (control, deficit- and regular irrigation). The chlorophyll content was estimated with SPAD and the leaf surface temperature with Raytek MX4 TD. Our research concluded that deficit irrigation produced the highest yields for all cultivars and the lowest yields for the highest water supply.
Highlights
Several species of chili peppers are being consumed around the world
The treatment that obtained the highest value for surface temperature and relative chlorophyll fluorescence (SPAD) was control followed by water deficit and continuous irrigation (Figure 2)
Comparing the three treatments with different water supplies, it can be observed that the highest SPAD values were produced by the control treatment, followed by the deficient irrigation, and the regular irrigation treatment reached the lowest values
Summary
Several species of chili peppers are being consumed around the world. The interest in this condiment is due to the flavors that this spice offers the food besides contain high concentrations of provitamin A, vitamins E and C, and antioxidant compounds, and can be good sources of carotenoids and xanthophylls. The season and the weather are important for pepper because this spice is a light-demanding species. It requires summer and autumn rich in sunlight to produce a good quality crop. The optimum temperature conditions for pepper cultivation are like other Solanaceae (tomatoes or eggplants), which require a long, frost-free period in the open field to produce high-quality, high-yield crops (Bosland and Votava, 2012). Another important factor to produce peppers is the water supply, and this factor is determined by the chosen variety, temperature and nutrient supply of the soil (Balázs, 2004). The red-ripen varieties should be harvested in the so-called "red-ripe" stage, when the total surface of the fruit is red, because it contains the highest amounts of vitamin C and carotenes (Koncsek et al, 2018)
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