| 1. |
- Bringslimark, Tina, et al.
(författare)
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Psychological benefits of indoor plants in workplaces : Putting experimental results into context
- 2007
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Ingår i: Hortscience. - 0018-5345 .- 2327-9834. ; 42:3, s. 581-587
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Tidskriftsartikel (refereegranskat)abstract
- Laboratory experiments and quasi-experimental field studies have documented beneficial effects of indoor plants on outcomes such as psychophysiological stress, task performance, and symptoms of ill health. Such studies have taken an interest in the value of indoor plants in work settings, but they typically have not considered how the effects of plants might compare with effects of other workplace characteristics. The present study makes an initial attempt to situate the potential benefits of indoor plants in a broader workplace context. With cross-sectional survey data from 385 Norwegian office workers, we used hierarchical regression analyses to estimate the associations that plants and several often-studied workplace factors have with perceived stress, sick leave, and productivity. Other variables included in our models were gender, age, physical workplace factors (e.g., noise, temperature, lighting, air quality), and psychosocial workplace factors (demands, control, social support). After controlling for these variables, the number of indoor plants proximal to a worker's desk had small but statistically reliable associations with sick leave and productivity. Although small, such associations can have substantial practical significance given aggregation over the large number of office workers over time.
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| 2. |
- Gunnarsson, Anita, et al.
(författare)
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Biodigestion of Plant material Can Improve Nitrogen Use Efficiency in a Red Beet Crop Sequence
- 2011
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Ingår i: Hortscience. - : American Society for Horticultural Sciences. - 0018-5345 .- 2327-9834. ; 46:5, s. 765-775
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Tidskriftsartikel (refereegranskat)abstract
- Nitrogen (N) tied up in or lost from decomposing biomass decreases the residual N effects of green manure and of other crop residues. During anaerobic degradation in a biogas digestor (biodigestion), N mineralization takes place under conditions in which losses can be kept to a minimum. Therefore, biodigestion of green manure biomass and beet foliage was tested to generate readily available N and compared with a direct green manure fertilization system. The effluent was applied as fertilizer in field experiments on a sandy soil as a tool for improving N supply for an organic farming system. Data from the field experiments were used for simulating the amount of net inorganic N equivalents (inorganic N equivalents from effluent plus inorganic N equivalents from pre-crops) in three crop sequences: A) green manure ley, red beets, winter rye; B) harvested ley, red beets, winter rye; and C) harvested ley, spring barley, red beets in which (B) and (C) represented biogas nutrient management systems and (A) a green manure system. When all available effluent from biogas production from 1 ha of grass–clover ley with two or three harvests (2H-ley or 3H-ley) and one hectare of beet foliage was used as a fertilizer for red beets (Beta vulgaris var. conditiva Alef) after barley (Hordeum vulgare L.), the yield of marketable red beets increased by 5.7 Mg·ha–1 (33%) with effluent from 2H-ley and beet foliage and 9.1 Mg·ha–1 (53%) with effluent from 3H-ley and beet foliage compared with red beets grown without effluent fertilization after a green manure ley. When total dry matter production was taken into account, the advantage for the BG systems with 2H- and 3H-ley was 15% and 28%, respectively. The nitrate concentration in the red beets was not higher with effluent supplied at this level than with green manure as the only N source. The simulated amount of net inorganic N equivalents was 128 kg N for the whole of crop sequence (C) with 1 ha of each crop and where effluent supply to red beets was based on digested biomass in ley and beet tops. The corresponding amount of net inorganic N equivalents for the green manure crop sequence (A), in which no effluent was supplied, was 73 kg N. Unused soil mineral N (0- to 90-cm depth) at red beet harvest indicated that the risk of leaching in BG systems was lower than in GrM systems (88, 76, and 61 kg Nmin/ha left after unmanured beets after Gr-M-ley, low manured beets after 3H-ley and high manured beets after barley, respectively). Effluent fertilization of red beets directly after 2H- and 3H-ley gave unexpectedly low yield responses compared with red beets after barley. The reasons may be the result of nutritional imbalance of other nutrients than N or may be plant pathological in nature. The conclusion is that a nutrient management system with biodigestion can increase net inorganic N equivalents and reduce risk for N leaching, but inappropriate use of the effluent, i.e., at an unsuitable point in the crop rotation, may negate the benefits.
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| 3. |
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| 4. |
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| 5. |
- Olsson, Marie, et al.
(författare)
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Ursolic and Oleanolic Acid in 'Aroma' Apple Peel as Affected by Rootstock, Harvest Maturity, and Storage Method
- 2016
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Ingår i: HortScience. - 0018-5345. ; 51, s. 349-355
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Tidskriftsartikel (refereegranskat)abstract
- Apples contain substances with health-promoting properties, among them, triterpenes, including oleanolic acid (OA) and ursolic acid (UA), which are thought to have anti-inflammatory activity as well as inhibiting initiation, promotion, and metastasis of cancer. This study evaluated effects of harvest time, rootstock, and storage method on two major triterpenes in apple peel, to enhance the understanding of the relative importance of cultivation and environmental factors influencing triterpene concentration. OA and UA concentrations in the semi-dwarfing '1 %/.106' rootstock apples were significantly higher than in the dwarfing 'M.9' rootstock apples at the majority of harvest times over the 2 y-ears of investigations. In 2012 at harvest time, highest concentrations of OA and UA in 'MM.106' rootstock apples were 63.4 and 416.3 mu g.cm(-2), respectively, while they were 59.7 and 380.9 mu g.cm(-2), respectively, in 'IVI.9' rootstock apples. UA remained fairly stable in most cases during storage, and no difference was found between regular atmosphere storage and controlled atmospheric (CA) storage. OA concentration decreased after harvest time. Furthermore, OA showed different responses to regular atmosphere storage and CA storage, and year-to-year difference was also observed. The two rootstocks showed only slight differences in the effect on total soluble solids (TSS) and fruit color, while the titratable acidity (TA) in apples from trees on '1 1.9' rootstock had lower levels in most cases at the third harvest time as compared with apples from trees on 'MM.106' rootstock. OA concentration was positively correlated with UA concentration both directly at harvest and after storage. OA and UA concentrations were positively correlated with TA and TSS, while they were negatively correlated with red color.
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| 6. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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'Alisha', 'Anamaria', 'Bie', 'Bita', 'Caelan', 'Ivone', 'Lawrence', 'Margarete', and 'Victoria' Sweetpotato
- 2016
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Ingår i: HortScience. - 0018-5345. ; 51, s. 597-600
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Tidskriftsartikel (refereegranskat)
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| 7. |
- Raanaas, Ruth K., et al.
(författare)
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Effects of an indoor foliage plant intervention on patient well-being during a residential rehabilitation program
- 2010
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Ingår i: Hortscience. - 0018-5345 .- 2327-9834. ; 45:3, s. 387-392
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Tidskriftsartikel (refereegranskat)abstract
- Effects of an indoor plant intervention in a Norwegian rehabilitation center were assessed in a quasi-experiment. During a 2-year period, coronary and pulmonary patients (N = 282) completed self-report measures of health, subjective well-being, and emotion on arrival, after 2 weeks, and at the end of a 4-week program. The intervention involved the addition of indoor plants for the second year. On average, patient physical and mental health improved during the program, but the addition of plants did not increase the degree of improvement. Subjective well-being did, however, increase more in patients who went through their program after the addition of plants, although the effect was only apparent in the pulmonary patients. The patients reported more satisfaction with indoor plants and the interior generally after the intervention. Room for the intervention to affect outcomes may have been limited by the well-designed interior and the center's location in a scenic mountain area, but these favorable features of the context apparently did not negate the potential for indoor plants to contribute to patient well-being.
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| 8. |
- Sjöman, Henrik, et al.
(författare)
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Selection of Shrubs for Urban Environments-An Evaluation of Drought Tolerance of 120 Species and Cultivars
- 2023
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Ingår i: HortScience. - 0018-5345. ; 58, s. 573-579
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Tidskriftsartikel (refereegranskat)abstract
- comprise a very large proportion of the plant material used in public as well as private green spaces. Yet, there is currently a lack of quantitative assess-ments of stress tolerance in a large proportion of available species and cultivars of shrubs, thus complicating any design process involving shrubs. The aim of this study was to evaluate drought tolerance of many common and less traditional shrubs in-tended for public planting. Through this compilation, a first contribution (dataset) to species selection to obtain expected ecosystem services of shrubs is offered. As water stress is a major constraint for landscape plants in urban environments and is likely to increase in many regions under future climate scenarios, the quantitative drought tolerance of a species or genotype must be a fundamental consideration for plant selection for urban environments. In this study, we used water potential at the turgor loss point (TP0) as a key trait for evaluating drought tolerance of different species of shrubs. TP0 is a highly instructive trait because it represents a quantifiable measure of physiological drought tolerance. More negative TP0 values represent greater drought tolerance by allowing the leaf to maintain physiological function over a greater range of leaf water potentials. TP0 was estimated for a wide range of shrubs, representing a total of 44 genera and 120 species and cultivars. The mean TP0 value for all 120 shrub species and cultivars was -2.76 MPa, with the overall species TP0 value ranging from -1.48 MPa to -4.23 MPa. Intraspecific variation (variation between cultivars) was evaluated using five cultivars of Spiraea japonica and one wild collected genotype. Within this species, there was a range of TP0 values of 1.66 MPa, with S. japonica 'Little Princess' having the highest estimated drought tolerance (TP0 = -2.78) and the wild-type S. japonica having the lowest (TP0 = -4.44 MPa).
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| 9. |
- Sriskandarajah, Sridevy
(författare)
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Biomass Distribution in Kalanchoe blossfeldiana Transformed with rol-genes of Agrobacterium rhizogenes
- 2009
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Ingår i: HortScience. - 0018-5345. ; 44, s. 1233-1237
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Tidskriftsartikel (refereegranskat)abstract
- Kalanchoe blossfeldiana transformed with Agrobacterium rhizogenes exhibited marked alterations in morphology and biomass distribution. Plants termed root-inducing (Ri) lines were regenerated from hairy roots produced by inoculating leaf explants with Agrobacterium rhizogenes wild-type strain ATCC15834. Six Ri lines were characterized in a greenhouse trial and all Ri lines had reduced dry weights of main shoot, lateral shoots, leaves, and flowers compared with control plants. The reduction in dry weights of these organs correlated with reduced plant height, shoot length, leaf area, and number of flowers per plant. Furthermore, an altered distribution of dry matter was evident in the Ri plants, where the greater part of dry matter was allocated into leaves and secondly into flowers, whereas the majority of dry matter in control plants was allocated into flowers and secondly into leaves. Furthermore, a higher percentage of dry matter was allocated into the main shoot of the Ri lines in comparison with that of control plants. Increased dry matter in leaves and in the main shoot in the Ri lines appeared to he at the expense of dry matter allocated into flowers. Moreover, an increased number of vegetative lateral shoots was recorded in the Ri lines, whereas the number of reproductive lateral shoots was decreased. Possible mechanisms behind the altered resource distribution are discussed
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| 10. |
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