Cesium-137 concentration of forage corn and Italian ryegrass in a double cropping system under different rates of cattle farmyard manure application after the Fukushima Daiichi Nuclear Power Station accident in 2011

Abstract

Abstract. These results suggest that continuous FYM application can maintain soil nutrients including K 2 O and thereby control radioactive Cs transfer from the soil. FYM application rate of 30 Mg ha −1 is within the levels recommended by the prefectural governments around Fukushima Prefecture for crop production before the accident. These levels are sufficient to decrease the radioactive Cs concentrations for corn. However, unlike corn, differences in soil chemical properties by FYM application did not affect 137 Cs concentrations in Italian ryegrass in this study, although low exchangeable K 2 O seemed to increase concentrations of stable 133 Cs. Further experiments should be conducted to understand the observed differences between corn and Italian ryegrass.

Yield and Quality of Forages in a Triple Cropping System in Southern Kyushu, Japan

“…Annual DM and TDN yields of the triple crops was 4098 g DM/m 2 and 2377 g•m −2 , respectively, in the first cropping season and 4349 g DM/m 2 and 2938 g•m −2 , respectively, in the second cropping seasons, which surpassed 3100 g DM/m 2 in double cropping of maize and Italian ryegrass [42] and 2200 g•m −2 of TDM yield in maize double-cropping system in the region [43].…”

Influence of Continuous Application of Radioactive Cs Contaminated Farmyard Manure Compost to Radioactive Cs Contaminated Soils on the Forage Corn

“…Therefore, it is important to evaluate the effects of FYMC application on the Cs uptake by crops, and crop productivity. However, studies on the effects of continuous FYMC application on the Cs content in soil and crops are limited (Harada et al 2015). Moreover, the Cs content in crops and the productivity in top soil and subsoil have not yet been compared.…”