Nutrient Status in Composts and Changes in Radioactive Cesium Following the Fukushima Daiichi Nuclear Power Plant Accident

作者：Jayasanka Dikkumburage Jasintha; Komatsuzaki Masakazu; Hoshino Yuta; Seki Hiroichi; Moqbal Mohammad Ismail

来源：Sustainability, 2016, 8(12): 1332.

DOI：10.3390/su8121332

• wood chip compost
• bamboo compost
• radioactive Cs contamination
• FDNPP accident
• rice bran

Following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, the forests in the Fukushima area were highly contaminated with radiocesium (Cs-137 and Cs-134). Therefore, there is a need to develop strategies for remediation of the contaminated forests. We assessed changes in radioactive cesium (Cs-134 and Cs-137) contamination and nutrient status in composts derived from wood chip, bamboo leaf and bamboo powder using rice bran and wheat meal as sub-materials. Changes in soil properties and Komatsuna (Brassica rapa var. perviridis) growth were also investigated due the application of composts and initial materials at 0, 2.5, 5 and 10 kg.m(-2) input levels. Mixing of sub-materials significantly reduced the concentration of radioactive Cs and improved compost quality. The effectiveness of three composts on soil quality improvement varied depending on their types and rates of applications. Amendments of bamboo leaf composts at 10 kg.m(-2) resulted in the significantly highest soil inorganic N, available P and exchangeable K contents. Amendments of final composts also enhanced Komatsuna growth. Furthermore, radioactive Cs contaminations of the Komatsuna plants grown in these composts were below 0.1 Bq.kg(-1). This study may help to remediate the forests contaminated with radiocesium in the Fukushima area while improving the soil organic matter content to enhance soil sustainability.

• 出版日期2016-12