Cadmium is one of the important contaminative heavy metals. Due to continuous increase of discharge of Cadmium in industrial and agriculture production, cadmium contamination of soil is more and more serious day by da...Cadmium is one of the important contaminative heavy metals. Due to continuous increase of discharge of Cadmium in industrial and agriculture production, cadmium contamination of soil is more and more serious day by day, which seriously threatens ecological environment and human health. Treatment of cadmium becomes an urgent issue and research hot point. At present, remedy for cadmium pollution upon soil mainly are physical restoration, chemical restoration and biological restoration, also there are measurements by means of adding external source matter and selecting low-Cd-accumulation varieties so as to reduce cadmium harm upon agricultural products. This article introduces in detail the resource of cadmium in soil and the present condition of cadmium pollution in farmland and processing of domestic cadmium pollution research, processing stage of domestic and foreign research of restoration of cadmium polluted soil as well as various peculiarities of repair methods. Finally, the expectation of research is discussed.展开更多
Dear Editor,Biological soil crusts(BSCs),a layered structure formed by associations of soil organisms and topsoil,dominate arid and semiarid areas and serve important ecological functions in these areas(Eldridge and G...Dear Editor,Biological soil crusts(BSCs),a layered structure formed by associations of soil organisms and topsoil,dominate arid and semiarid areas and serve important ecological functions in these areas(Eldridge and Greene,1994).Nitrogen fixation by BSCs is the main source of N in arid and semi-arid ecosystems.Desiccation is the most notable factor that influences BSCs,which recover physiological activity only after moistening.By influencing the amount of carbohydrates,展开更多
To date, theories of eco-compensation and biological restoration have been popular, and some models in developed countries are treated as good examples. Here, we not only focus on Japan, but also pay more attention to...To date, theories of eco-compensation and biological restoration have been popular, and some models in developed countries are treated as good examples. Here, we not only focus on Japan, but also pay more attention to challenges during this process. Based on a long-term field study on Sado Island, a less developed region in Japan, we attempt to describe how the government carries out environmental remediation towards the reintroduction of ibis （Species name） into the wild, and the conflict between ibis habitat restoration and farm management. We discuss the underlying reasons for this conflict and the negative effect on regional development. We follow policy improvements of the local government and related supplementary help carried out to fix the mismatch between the payment for ecological benefits and that lost by farmers in the pre-period. We conclude that the coordination of interest among different social groups is the key for success in ecological restoration and compensatory measures have to be made to meet the actual needs of the local groups. This case study in Japan can be applied to similar regions with poor environments and urgent environment restoration needs in China.展开更多
基金Supported by the National Natural Science Foundation of China(20477032)China Agriculture Research System(Nycytx-25)
文摘Cadmium is one of the important contaminative heavy metals. Due to continuous increase of discharge of Cadmium in industrial and agriculture production, cadmium contamination of soil is more and more serious day by day, which seriously threatens ecological environment and human health. Treatment of cadmium becomes an urgent issue and research hot point. At present, remedy for cadmium pollution upon soil mainly are physical restoration, chemical restoration and biological restoration, also there are measurements by means of adding external source matter and selecting low-Cd-accumulation varieties so as to reduce cadmium harm upon agricultural products. This article introduces in detail the resource of cadmium in soil and the present condition of cadmium pollution in farmland and processing of domestic cadmium pollution research, processing stage of domestic and foreign research of restoration of cadmium polluted soil as well as various peculiarities of repair methods. Finally, the expectation of research is discussed.
基金supported by the Special Fund for Forest Scientific Research in the Public Welfare of China (201404204-02)
文摘Dear Editor,Biological soil crusts(BSCs),a layered structure formed by associations of soil organisms and topsoil,dominate arid and semiarid areas and serve important ecological functions in these areas(Eldridge and Greene,1994).Nitrogen fixation by BSCs is the main source of N in arid and semi-arid ecosystems.Desiccation is the most notable factor that influences BSCs,which recover physiological activity only after moistening.By influencing the amount of carbohydrates,
基金National Natural Science Foundation of China (41101120), National Natural Science Foundation of China (41101150)
文摘To date, theories of eco-compensation and biological restoration have been popular, and some models in developed countries are treated as good examples. Here, we not only focus on Japan, but also pay more attention to challenges during this process. Based on a long-term field study on Sado Island, a less developed region in Japan, we attempt to describe how the government carries out environmental remediation towards the reintroduction of ibis （Species name） into the wild, and the conflict between ibis habitat restoration and farm management. We discuss the underlying reasons for this conflict and the negative effect on regional development. We follow policy improvements of the local government and related supplementary help carried out to fix the mismatch between the payment for ecological benefits and that lost by farmers in the pre-period. We conclude that the coordination of interest among different social groups is the key for success in ecological restoration and compensatory measures have to be made to meet the actual needs of the local groups. This case study in Japan can be applied to similar regions with poor environments and urgent environment restoration needs in China.
