| 1. |
- Alam, Mehboob, et al.
(författare)
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Prevalence of Escherichia coli O157:H7 on spinach and rocket as affected by inoculum and time to harvest
- 2014
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Ingår i: Scientia Horticulturæ. - : Elsevier BV. - 0304-4238 .- 1879-1018. ; 165, s. 235-241
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Tidskriftsartikel (refereegranskat)abstract
- Irrigation water is an important vehicle for dissemination of human pathogens to plants. As contamination in an early stage of the production chain cannot necessarily be counteracted later, cultural measures to reduce the contamination risk need to be adopted during primary production. In a two-factorial greenhouse experiment, we studied the impact of inoculum density and the interval between irrigation and haivest on the prevalence of an inoculated gfp-tagged non-pathogenic strain of Escherichia coli O157:H7. The strain was inoculated with the irrigation water at a density of log 5.6, log 6.6 and log 7.6 CFU ml(-1) into the phyllosphere of fully grown crops of rocket and spinach (BBCH 49). The crops were then harvested after 3, 24,48 and 72 h. The introduced strain decreased exponentially in numbers within 72 h, to 49.6%, 52.6% and 50.6%, respectively, in the spinach and to 58.5%, 67.4% and 73.4% in the rocket. No differences were found in the number of the total viable count of aerobic bacteria and of Enterobacteriaceae as assessed on tryptic soy agar (TSA) and violet red bile dextrose agar (VRBD), respectively. Sequencing of the 16S rRNA genes of randomly selected isolates from VRBD were identified as Enterobacter cloaceae, Enterobacter ludwigii, Pantoea sp. and Raoultella planticola as the dominant Enterobacteriaceae species in the rocket and spinach phyllosphere. We found that cessation of irrigation for three days seems not to be an adequate sanitisation treatment to exclude the possibility of viable E. coil 0157:H7 cells on spinach or rocket. (C) 2013 Elsevier B.V. All rights reserved.
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| 2. |
- Ali, Liaqat, et al.
(författare)
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Effects of nutrition strategy on the levels of nutrients and bioactive compounds in blackberries
- 2012
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Ingår i: European Food Research and Technology. - : Springer Science and Business Media LLC. - 1438-2377 .- 1438-2385. ; 234:1, s. 33-44
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Tidskriftsartikel (refereegranskat)abstract
- The effects of nutrition strategy on levels of nutrients and bioactive compounds in fruit and leaves of blackberries were studied in greenhouse-grown blackberry plants fertilised with combinations of two levels (low, high) of nitrogen (60 and 100 kg ha -1, respectively) and potassium (66.4 and 104 kg ha -1, respectively). Plant concentrations of organic phytochemicals were quantitatively analysed by high-performance liquid chromatography. High amounts of both fertilisers produced high amounts of all nutrients and bioactive compounds analysed in fruit except total acidity and ellagic acid. There were major differences in compounds affecting taste in fruit, e. g., sugars (fructose and glucose), total soluble solids and pH, and also in anthocyanin content. The concentrations of secondary metabolites, vitamin C and ellagic acid in fruit also varied significantly between treatments, although the differences were smaller. Storage of blackberries showed variable effects in the different levels of compounds, and the changes found were small. Nutrient regime did not affect blackberry leaves to the same extent, and only minor changes were found. The findings show that by optimising plant nutrition, phytonutrient levels can be maximised and maintained in fresh and stored berry crops, especially those grown in greenhouses, where conditions can easily be regulated.
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| 3. |
- Alsanius, Beatrix
(författare)
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Advances and Trends in Organic Fruit and Vegetable Farming Research
- 2015
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Ingår i: Horticultural Reviews. Volume 43. - Hoboken, New Jersey : John Wiley & Sons, Inc.. - 9781119107750 ; 43:43, s. 185-267
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Bokkapitel (refereegranskat)abstract
- Organic horticulture has doubled from 2003 to 2013 in response to increasing demand for organic fruits and vegetables. The number of scientific studies investigating this research field has tripled from 1994 to 2013. This reflects the existence of policy support for organic horticulture as well as government and industry funding for research. Yields of organic fruit and vegetable farming systems can reach on average 89-102% of conventional yields. The environmental benefits of organic farming are well documented for biodiversity and for water and soil conservation. However, limited seed and plant materials have been developed for organic farming. One of the remaining challenges in production is to achieve a balanced nutrient composition of organic amendments and a timely nutrient release with plant nutrient uptake. Another major barrier for the expansion of organic horticulture is related to limited effective tools for pest, disease, and weed management. Although new biological control agents and biopesticides have been proposed in response to the alarming resistance to synthetic pesticides, additional plant protection research is needed. Beyond the fact that the health benefits of organic foods are controversial, organic fruits and vegetables have lower nitrate content and pesticide residues, and their vitamin C and phenolic compounds are often higher than conventional ones. However, few studies have dealt with strategies that promote or impair microbiological food safety. This is the case despite the proximity of edible plants with animal manure together with limited tools for organic farming to prevent microbial pre- and postharvest proliferation. The aim of this chapter was threefold: to draw a picture of the current situation of organic fruit and vegetable production in the world, to present the development of research related to this sector since the past 40 years, and to highlight the benefits and constraints of this production system, emphasizing nutritive value and microbiological food safety. In conclusion, key research areas are proposed to support the development of organic horticulture by increasing its resilience and security.
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| 4. |
- Alsanius, Beatrix
(författare)
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An updated glossary of terms and basic characteristics of growing media
- 2023
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Ingår i: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 1377, s. 925-934
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Konferensbidrag (refereegranskat)abstract
- In the research community of growing media, there is an increasing confusion related to inappropriate use of terms, and to a lack of description of minimal chemical, physical, biological characteristics of growing media and their components for adequate data interpretation in scientific publications. A survey was conducted between the summer of 2019 and the autumn of 2020 among growing media scientists worldwide to help addressing these two issues and published later as a basic framework (Caron and Zheng, 2021). In 2022, a workshop was organized to update terms and definitions and report further progress with respect to terms and basic characteristics. This paper summarizes the improvement of the glossary suggested by Caron and Zheng (2021).
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| 8. |
- Alsanius, Beatrix
(författare)
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Bassiluskan, bassiluskan......om personalens hälsa och hygien inom produktionen av livsmedel i trädgårdsnäringen
- 2015
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Ingår i: LTV-fakultetens faktablad.
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Annan publikation (populärvet., debatt m.m.)abstract
- Personalens hygien och hälsostatus är en viktig bidragande orsak till spridning av humansmittor med frukt, bär och grönsaker Hygien och hälsa påverkas av kulturella traditioner och ekonomiska faktorer Arbetet med personalens hygien och hälsostatus förutsätter ledarskap God hygien under arbetsdagen förutsätter tillgång till sanitära utrymmen med rinnande vatten, tvål och desinfektion och torkning Val av vattentemperatur, tvål, desinfektionsmedel samt torkningssätt inverkar på överlevnad av mikroorganismer på händer Barriärer i form av skyddskläder och handskar minimerar spridningsrisken från människor till frukt, bär och grönsaker, men kan samtidigt inge en falsk trygghet Hygien och hälsa är inte bara en fråga om kunskap utan också om insiktsbaserat handlande; det måste vara automatiserat Etablering av en företagskultur för personalens hygien och hälsa är ett ledarskapsansvar
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| 9. |
- Alsanius, Beatrix, et al.
(författare)
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Be circular – Från rötrester av svartvatten och köksavfall till flytande gödselmedel
- 2024
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Ingår i: LTV-fakultetens faktablad.
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Annan publikation (populärvet., debatt m.m.)abstract
- Effektiv användning av ändliga resurser är ett av de främsta målen för en hållbar utveckling. I ett kretsloppsperspektiv skulle näringsrikt avloppsvatten och näring fastlagd i köksavfall kunna bli till flytande gödselmedel till hobbyodlare. Vår utgångspunkt var sidoströmmar från biogasproduktion, både svartvatten (d.v.s. toalettvatten) och den flytande fraktionen av köksavfall. I ett Partnerskap Alnarp projekt mellan SLU, AlnarpFoodTech Ek. för. och RecoLab vid NSVA i Helsingborg undersökte vi bland annat förbättringsområden för att ta fram en tillförlitlig och säker växtnäringsprodukt.
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| 10. |
- Alsanius, Beatrix, et al.
(författare)
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Bedömning av markens mikroliv
- 2024
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Ingår i: LTV-fakultetens faktablad.
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Annan publikation (populärvet., debatt m.m.)
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