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Morphological and Yield Parameters, Dry Matter Distribution, Nutrients Uptake, and Distribution in Strawberry (Fragaria × ananassa Duch.) cv. ‘Elsanta’ as Influenced by Spent Mushroom Substrates and Planting Seasons
The performance of autumn and spring-planted strawberry cv. ‘Elsanta’ in peat and peat supplemented with fresh spent mushroom substrate (SMS) of Agaricus bisporus, Lentinus edodes, and Pleurotus ostreatus in 15% and 25% was evaluated. The morphological and yield parameters, dry matter distribution, uptake, and partitioning of macro- and micronutrients were studied. The experiment was carried out during 2020–2021 in an unheated tunnel and was laid out in a randomised complete block design in five replicates. The study aimed to deliver greater insight into utilising fresh SMS as a sustainable substitute to peat. The shoot and root length, leaf number, crown diameter, plant dry weight, and marketable yields were superior in SMS-based substrates in autumn planting. The nutrient uptake varied among substrates and planting seasons, where higher plant nutrient uptake was noticed in SMS-based substrates. Nutrient partitioning among leaves, crowns, and roots was dynamic. The N, P, K, and Mn were mainly recovered in leaves. While Mg was almost equally partitioned among plant organs. The higher amounts of Na, Zn, and Cu were found in crowns. The greater accumulation of Ca and Fe in roots was evident. Correlation indicated that plant macro- and micronutrients had both positive and negative interactions. Overall, the superior morphological and yield performances of cv. ‘Elsanta’ were more noticeable in SMSs than in peat in autumn-planted strawberries.
Combined Dairy Manure-Food Waste Digestate as a Medium for Pleurotus djamor—Mineral Composition in Substrate and Bioaccumulation of Elements in Fruiting Bodies
The present investigation aimed to study the utilisation of combined dairy manure-food waste digestate as a substrate (experimental mushroom substrate—EMS) for Pleurotus djamor (strain 2708, Mycelia) cultivation. Considering the lack of scientific information about the influence of elements concentration in growing substrates on the bioaccumulation of elements in cultivated mushrooms and their residual concentrations in substrates left after cultivation (spent mushroom substrate—SMS), a multi-elemental analysis of 38 elements was carried out. In the study, inductively coupled plasma optical emission spectrometry (ICP OES) was used for elemental analysis. The P. djamor cultivated on EMS resulted in a yield of 196.50 g/bag, achieving a biological efficiency (BE) of 39.90%. High variability in the elemental concentrations among substrates both before and after mushroom cultivation was evident. The studied elements accumulation in P. djamor was in an increasing trend in three subsequent flushes and was also reflected in the bioconcentration factors (BCFs). The highest BCF (2.35) was determined for Fe. Interestingly, the BCF values for all studied trace elements with detrimental health effects were lower than 1.00. The estimated daily intake (EDI) reflected that the P. djamor fruiting bodies grown on EMS can serve as an excellent dietary source of essential major and trace elements: Ca, Mg, Na, Mn, Mo, Ni, Se and Zn. On the other hand, EDI values for K, Cu, Fe, Ag, Ba, Cd, Al, Sb and Sr were greater than the referred guideline values corresponding to higher intake. Overall, the study presented an insight into elemental accumulations and demonstrated the potential utilisation of combined dairy manure-food waste digestate.