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Nutritional analysis of cold-climate perennial vegetables M Toensmeier, Eric, Eva Johansson, Rebecka Törnqvist, and Annevi Sjöberg.. Perennial Agriculture Institute, 16 Feb 2021. Experiment. doi: 10.18258/18757
We will analyse the leaves of three of the following plants: Hosta (Hosta Sieboldii), Linden (Tilia cordata), Caucasian spinach (Hablitzia tamnoides) and Scorzonera (Scorzonera hispanica). The plants are selected based on four criteria: 1) taste, 2) a relatively high crop yield, 3) indication of being nutrient rich and 4) has been grown close to each other in the same soil at established perennial vegetable cultivation sites.
This is the minimum number of plants we will evaluate. If we will be able to raise more money than our funding target in the crowdfunding campaign, more plants will be included in the analysis. The leaves will be analysed for important nutrients such as Calcium, Iron, Magnesium, Zinc, Vitamin B6, Vitamin C, Vitamin E, Folic acid, Protein and Beta carotene, as well as for water content and fibers.
The same analyses for a common wild plant with well-known
nutrition values (e.g., stinging nettle Urtica dioica) will be
performed in order to compare our results. This result could also be
compared to already documented nutrition values of the species, in order to
examine whether the study site could be considered representative for
cultivating vegetables considering, e.g. soil factors.
The time of harvest of the plants will be at the peak of ripening and before blooming. The time of harvest will vary between plants and will be decided when the growers consider
it to be optimal. The vegetables will then be picked, weighed for fresh
weight, and photo-documented. Some vegetables will be cooked before they
get analysed, to reflect the way they are normally used. Leaves will be
packaged and sent to accredited laboratories. Swedish standard analysis
methods for minerals and vitamins in food will be used.
This project has not yet shared any protocols.