2023 Volume 3 Issue 2 Pages 29-35
Tomioka town and Okuma town, Fukushima prefecture, were extensively contaminated with radioactive materials during the nuclear accident. Post-decontamination field is often covered with mountain soil with low nitrogen fertility. It has been proposed to recover soil fertility by using compost and green manure to increase agricultural productivity. As a result of the cultivation test of various leguminous green manures, Hairy vetch (Vicia villosa Roth), in particular, had a large amount of nitrogen accumulation and was found to be effective in soil fertility recovery. It was also found that Persian clover (Trifolium resupinatum L.) is relatively insensitive to excessive humidity. In crop cultivation after green manure planting, it was confirmed that there was a positive correlation between the amount of nitrogen accumulation of the green manure and the yield of rice or buckwheat. On the other hand, there are many fields that have not resumed farming, and it is important to manage such fields while recovering soil fertility. As one of the means, the technique of collecting honey while cultivating leguminous green manure has been studied in post-decontamination field. The cultivation of green manure has not progressed much in farm management in this area. I think that the importance of soil fertility recovering and how to use green manure are not being well-communicated to farmers. In order to promote the cultivation area of green manure for farming resumption, it is important to disseminate information to producers.
