A long-term experiment was conducted to investigate how long-term fertilization and rice straw incorporation into soil affect soil glomalin, C and N. The combined application of chemical fertilizer and straw resulted ...A long-term experiment was conducted to investigate how long-term fertilization and rice straw incorporation into soil affect soil glomalin, C and N. The combined application of chemical fertilizer and straw resulted in a significant increase in both soil easily extractable glomalin (EEG) and total glomalin (TG) concentrations, as compared with application of only chemical fertilizer or no fertilizer application. The EEG and TG concentrations of the NPKS (nitrogen, phosphorus, and potassium fertilizer application + rice straw return) plot were 4.68% and 5.67% higher than those of the CK (unfertilized control) plot, and 9.87% and 6.23% higher than those of the NPK (nitrogen, phosphorus, and potassium fertilizer applied annually) plot, respectively. Application of only chemical fertilizer did not cause a statistically significant change of soil glomalin compared with no fertilizer application. The changes of soil organic C (SOC) and total N (TN) contents demonstrated a similar trend to soil glomalin in these plots. The SOC and TN contents of NPKS plot were 15.01% and 9.18% higher than those of the CK plot, and 8.85% and 14.76% higher than those of the NPK plot, respectively. Rice straw return also enhanced the contents of microbial biomass C (MBC) and microbial biomass N (MBN) in the NPKS plot by 7.76% for MBC and 31.42% for MBN compared with the CK plot, and 12.66% for MBC and 15.07% for MBN compared with the NPK plots, respectively. Application of only chemical fertilizer, however, increased MBN concentration, but decreased MBC concentration in soil.展开更多
Aim of the Study: This study aimed to clarify the factors that were relevant to an individual’s self-determination to return amidst anxiety after a long-term evacuation due to the Fukushima Daiichi Nuclear Power Plan...Aim of the Study: This study aimed to clarify the factors that were relevant to an individual’s self-determination to return amidst anxiety after a long-term evacuation due to the Fukushima Daiichi Nuclear Power Plant accident. Method: Semi-structured interviews on whether to return were conducted with nine participants aged 60 - 80 years (eight males and one female) residing in areas where evacuation orders were canceled. The data obtained were analyzed qualitatively and inductively. Result: All participants were returning to their homes. Factors relevant to self-determination to return were represented by five categories: a desire to return 1) emerging from life-experience as a long-term evacuee, 2) retained after obtaining information about the original place of residence, 3) acquired from a long-term life as a refugee, 4) retained with the acceptance of the potential risks of returning, and finally 5) people’s apprehension over talking about the importance of the future of the younger generation. Discussion: These categories were based on the participants’ desire to return and they continued to maintain these thoughts by gathering information and preparing for their return after the long-term evacuation caused by the nuclear accident. It was suggested that the risk perception and the norm in that age group could be among the factors that promoted the choice in maintaining the desire to return.展开更多
To explain medium-term momentum and long-term reversal,we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio.According to the CAPM model’s zero explanatory ability ...To explain medium-term momentum and long-term reversal,we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio.According to the CAPM model’s zero explanatory ability with respect to stock market anomalies,we obtain an anomaly interpretative model.This study shows that this anomaly interpretative model can explain stock market perceptions and medium-term momentum.Most importantly,BM is a critical factor in the model’s explanatory ability.We present a robustness test,which includes selecting new sample data,adding new auxiliary variables,changing sample years,and adding industry fixed effects.In general,the BM effect does have considerable explanatory power in medium-term momentum and long-term reversal.展开更多
基金Project supported by the National Key Basic Research Support Foundation of China (No.2002CB410810).
文摘A long-term experiment was conducted to investigate how long-term fertilization and rice straw incorporation into soil affect soil glomalin, C and N. The combined application of chemical fertilizer and straw resulted in a significant increase in both soil easily extractable glomalin (EEG) and total glomalin (TG) concentrations, as compared with application of only chemical fertilizer or no fertilizer application. The EEG and TG concentrations of the NPKS (nitrogen, phosphorus, and potassium fertilizer application + rice straw return) plot were 4.68% and 5.67% higher than those of the CK (unfertilized control) plot, and 9.87% and 6.23% higher than those of the NPK (nitrogen, phosphorus, and potassium fertilizer applied annually) plot, respectively. Application of only chemical fertilizer did not cause a statistically significant change of soil glomalin compared with no fertilizer application. The changes of soil organic C (SOC) and total N (TN) contents demonstrated a similar trend to soil glomalin in these plots. The SOC and TN contents of NPKS plot were 15.01% and 9.18% higher than those of the CK plot, and 8.85% and 14.76% higher than those of the NPK plot, respectively. Rice straw return also enhanced the contents of microbial biomass C (MBC) and microbial biomass N (MBN) in the NPKS plot by 7.76% for MBC and 31.42% for MBN compared with the CK plot, and 12.66% for MBC and 15.07% for MBN compared with the NPK plots, respectively. Application of only chemical fertilizer, however, increased MBN concentration, but decreased MBC concentration in soil.
文摘Aim of the Study: This study aimed to clarify the factors that were relevant to an individual’s self-determination to return amidst anxiety after a long-term evacuation due to the Fukushima Daiichi Nuclear Power Plant accident. Method: Semi-structured interviews on whether to return were conducted with nine participants aged 60 - 80 years (eight males and one female) residing in areas where evacuation orders were canceled. The data obtained were analyzed qualitatively and inductively. Result: All participants were returning to their homes. Factors relevant to self-determination to return were represented by five categories: a desire to return 1) emerging from life-experience as a long-term evacuee, 2) retained after obtaining information about the original place of residence, 3) acquired from a long-term life as a refugee, 4) retained with the acceptance of the potential risks of returning, and finally 5) people’s apprehension over talking about the importance of the future of the younger generation. Discussion: These categories were based on the participants’ desire to return and they continued to maintain these thoughts by gathering information and preparing for their return after the long-term evacuation caused by the nuclear accident. It was suggested that the risk perception and the norm in that age group could be among the factors that promoted the choice in maintaining the desire to return.
基金I follow the tutor to do two fund projects which is the National Social Science Fund Project(15BJY164)the Ministry of Education Humanities and Social Sciences Fund Project(14YJA790034),respectively.
文摘To explain medium-term momentum and long-term reversal,we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio.According to the CAPM model’s zero explanatory ability with respect to stock market anomalies,we obtain an anomaly interpretative model.This study shows that this anomaly interpretative model can explain stock market perceptions and medium-term momentum.Most importantly,BM is a critical factor in the model’s explanatory ability.We present a robustness test,which includes selecting new sample data,adding new auxiliary variables,changing sample years,and adding industry fixed effects.In general,the BM effect does have considerable explanatory power in medium-term momentum and long-term reversal.
