Salinity and drought affect yield response of bell pepper similarly

Abstract

There is a growing realization that an increasing number of countries are approaching full utilization of their conventional water resources and that the quantity of good-quality water supplies available to agriculture is diminishing. Effects of irrigation regime and irrigation water salinity on bell pepper including yield, fruit number and quality, vegetative and root growth, evapotranspiration and water use efficiency were investigated in this study by conducting two different experiments. Six different salinity levels of irrigation water and four different irrigation regimes were used as treatments. Considering the results from irrigation water salinity experiment, it can be concluded that as soil salinity increases, water consumption, water use efficiency, yield and other vegetative growth parameters of bell pepper were decreased. A polynomial relationship between soil salinity and water consumption was observed. It was found that bell pepper is moderately sensitive to salinity with a 1.2 dS m (1 threshold and a 10.9% slope value. In the irrigation regime experiment, limited irrigation caused decreases in water consumption, yield and vegetative growth of bell pepper. Yield response factors were close in the cases of irrigation regime (1.50) and irrigation water salinity (1.40). Total soluble solids of bell pepper were increased due to both irrigation water salinity and water application rate but not dry matter ratio. Considerable water consumption decreases because of salinity were determined. Therefore, the effect of irrigation water salinity should be considered in irrigation management to prevent excess saline water application and to protect the environment.

Salt-tolerant rootstock increases yield of pepper under salinity through maintenance of photosynthetic performance and sinks strength

“…Pepper is one of the most important crops in Mediterranean area, which is usually classified as a salt-sensitive species (Kurunc et al, 2011;del Amor and Cuadra-Crespo, 2011), even though Aktas et al (2006) observed that salt tolerance can vary amongst pepper genotypes. A promising perspective to improve pepper resistance to salinity is the use of grafting of commercial cultivars onto salt-tolerant rootstocks (Penella et al, 2013;Penella et al, 2015).…”

Some rootstocks improve pepper tolerance to mild salinity through ionic regulation

“…Pepper is one of the most important vegetable crops in these areas and is considered sensitive to salinity [3], even though salt tolerance can vary between pepper genotypes [4]. Some pepper accessions have been identified as salinity-tolerant and have been successfully used as pepper rootstocks under saline conditions [5].…”

Green long pepper growth under different saline and water regime conditions and usability of water consumption in plant salt tolerance

“…Letey & Dinar (1986) stated that different conditions for evapotranspiration were obtained by applying different soil moisture regimes but rarely by using saline water. Ozturk et al (2004) reported decreasing effect of salinity on water consumption for lemon balm, Yurtseven et al (2005) for tomato, Ünlükara et al (2008) for okra, Düzdemir et al (2009) for cowpea, Ünlükara et al (2010) for eggplant, Kurunc et al (2011) for bell pepper. Plant water consumption also changes with changing climatic conditions.…”