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- ItemEffects of Interrow Maintenance on Microclimate Parameters in Black Currant (Ribes nigrum L.)(Berlin ; Heidelberg [u.a.] : SpringerOpen, 2022) Nagler, Linda; Schwefler, Jana; Käthner, Jana; Giebel, Antje; Kramer, EckartThe aim of the study was to determine the influence of tramline maintenance frequency on air temperature and relative humidity in blackcurrant (Ribes nigrum) plantations. In practice, keeping tramline vegetation short serves as an applied and preventative technique to improve aeration in the crop and reduce disease pressure. The on-farm trials took place on two ecological shrub berry farms in Brandenburg (Weggun and Schöneiche) over a period from March to June 2021. The effects of maintenance frequency on the microclimate in the tramlines were determined for normal mowing frequency (business as usual, BAU) and increased mowing frequency (TEST). The results show that continuous short keeping of the tramlines has a demonstrable influence on the air temperature and humidity in the currant stand. In some cases, an increased mowing frequency (TEST) led to a significantly higher mean air temperature than under usual management (BAU), whereas the mean relative humidity was significantly lower. The effects were dependent on timing and site. Over the experimental period, maximum mean air temperature differences of 1.14 °C (Weggun site) and 1.96 °C (Schöneiche site) and maximum mean relative humidity differences of 3.69% (Weggun site) and 3.90% (Schöneiche site) were observed between the TEST and BAU variants. Especially in the plantation with the smaller row distance, this effect occurs more clearly. The results suggest that the plantation structure has an influence on these effects, which should be investigated in further trials.