Journal of Environmental Science for Sustainable Society
Online ISSN : 1881-5073
ISSN-L : 1881-5073
Volume 9
Displaying 1-1 of 1 articles from this issue
  • Nittaya WAKAI, Morihiro MAEDA, Toshiro ONO, Tadashi HANAFUSA, Jun YAMA ...
    2019 Volume 9 Pages 1-10
    Published: 2019
    Released on J-STAGE: July 24, 2019

       Removing soil surface is an effective method to reduce radioactive cesium (137Cs) in the contaminated agricultural land but this can result in the loss of soil fertility. Our experimental paddy field in Kawamata-town, Fukushima had the surface soil removed and replaced by sandy soil. The cattle manure compost was used to improve soil fertility. The objectives of this study were to determine the effects of cattle manure compost application at rates of 0 (control), 10, 20 and 40 t ha-1 on rice yields and on 137Cs transfer to stems, leaves and panicles of rice in 2015. Results showed that rice yields were increased with rates of cattle manure compost. Application of cattle manure compost caused the increase of exchangeable potassium (K) in the soil, resulting in reduction of 137Cs in rice parts. The 137Cs concentration was higher in stems than in leaves and was not detected in panicles.

       The 137Cs concentration in the aboveground parts of rice was decreased to the lowest (TF = 0.009) in soil that received 20 t ha-1of cattle manure compost, which was 2.4 times lower than that in the control. The transfer factor of 137Cs (TF) in aboveground parts of rice was negatively correlated with exchangeable K in the soil. The ratio of 137Cs/ K was higher in stems than in leaves and that was related to the concentration of exchangeable Ca, and Mg in the soil. The results indicated that exchangeable K, Ca and Mg derived from cattle manure compost affected the uptake and distribution of 137Cs in rice plants.

    Download PDF (1221K)