Abstract
The carrot (Daucus carota L.) is a staple vegetable in human nutrition in Europe. In recent years, the use of biostimulants in vegetable crops has become a way to affect the quantity and quality of yields. The aim of this study was to assess the effect of the type and methods of biostimulant (natural seaweed extract Kelpak and synthetic Asahi) application on the nitrates and nitrites content in carrot roots after harvest and storage. The study was based on a strict field experiment with carrot cv. ′Karotan′, conducted in Poland (53°13′N; 17°51′E) in three successive growing seasons and after six months of storage (RH 95%, and air temperature +1 °C). The biostimulants were applied during the growing season in a foliar form. The content of NO3ˉ and NO2ˉ in carrot after harvest depended on the dose and the date of biostimulant application. The single application of biostimulant Kelpak as well as two times of Asahi had no effect on the nitrate and nitrite content, while the application of Kelpak in a total dose of 6 or 7 dm3 ha−1 increased them. The maximum intake of nitrates and nitrites following the harvest and storage was, respectively, 7.1, 2.3% and 6.7, 2.1% of the ADI.
Highlights
In recent years, agricultural biological includes biofertilizers, biopesticides and biostimulants have gained higher importance over the synthetic farm inputs
Biostimulants are among some of the earliest agricultural inputs used by humanity and are an important component of sustainable agricultural practices [1,2,3,4,5,6]
The aim of this study was to determine the effects of the biostimulant application methods as well as long-term storage on nitrates and nitrites content in the storage roots of carrots
Summary
Agricultural biological includes biofertilizers, biopesticides and biostimulants have gained higher importance over the synthetic farm inputs. Rising demand for high-value crops and increasing abiotic soil and plant stresses encourage farmers to adopt bio-based agriculture products such biostimulants that can increase the crop yield and its quality. Increasing governmental support to high-quality agricultural product and launch of programs to educate farmers about various eco-friendly agri-input products use in farming [8,9,10,11] are some of the crucial reasons that are projected to enhance the biostimulants’ market growth during forecast years. Increasing product launches by market players and increased focus on novel substances that can potentially act as biostimulants are anticipated to aid growth. A further increase in the use of biostimulants is forecasted in this region [12]
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