Creative agriculture,a new agricultural format formed by integrating agriculture,tourism and creative industries,is an important part of the urban modern agriculture. Proceeding from the functional position as an ecol...Creative agriculture,a new agricultural format formed by integrating agriculture,tourism and creative industries,is an important part of the urban modern agriculture. Proceeding from the functional position as an ecological conservation area,Miyun creative agriculture has obtained rapid growth,relying on its ecological resources,agricultural resources,tourist resources and leisure industry advantages. But there are still some problems. On the basis of analyzing the advantages and problems of creative agriculture in Miyun,the paper put forward the basic principles and thought pattern of developing creative agriculture in there. Besides,several countermeasures in terms of resources integration, scientific planning,exploring local cultural resources,developing theme products,constructing industrial chain,carrying out project design and creative planning,creating creative agricultural advantage brand are put forward.展开更多
Based on the exploring of SWAT model suitability in Hei River Basin, this paper analyze quantitatively and compare non-point source pollution loads occurred under different land use scene. At last, the following concl...Based on the exploring of SWAT model suitability in Hei River Basin, this paper analyze quantitatively and compare non-point source pollution loads occurred under different land use scene. At last, the following conclusion can be attained： （1） Land use change exerts tremendous influence on non-point source pollution. Since forest land can save water and reduce soil loss, which decreases greatly the source of non-point source pollution; （2） Strengthening land management and promoting reasonable land use, especially the over 15 degree slope farmland, will be the effective measure to control non-point source pollution and protect the quality of water in the Hei River basin; （3） The best land use situation in Hei River basin should be like the following modes： complying with national water source protection policy, gradual evacuation of river basin population, returning all the sloping farmland which is above 15 degree to forest land, allowing the existence of few farming land below 15 slope degree on the premise that the drinking water quality standard is reached, no unused land, good vegetation covering situation. At then, total nitrogen load is 13.25 kg, total phosphate load is 3.29 kg, which means it will not contaminate展开更多
A magnesia adsorbent was prepared from straw pulp black liquor and magnesium sulfate for the first time, and its adsorption of phenol from aqueous solution was examined. The characteristics of the adsorbent were teste...A magnesia adsorbent was prepared from straw pulp black liquor and magnesium sulfate for the first time, and its adsorption of phenol from aqueous solution was examined. The characteristics of the adsorbent were tested through chemical analysis, surface analysis, X-ray diffraction and FT-IR spectroscopy. The effects of various factors, such as dose, adsorption time and adsorption temperature, on phenol adsorption behavior were studied. The results show that the adsorption processes can be fitted to the isotherm Langmuir model very well. It was found that the adsorption process was strongly influenced by temperature and the optimal temperature for phenol removal was 40 ℃. The optimum adsorption time was 10 min, and desorption would happen afterwards. Between the models of Langmuir and Freundlich, the adsorption process of phenol onto magnesia fitted the Langmuir equation better.展开更多
基金Supported by the Science and Technology Project of Beijing (z111108057911004)Philosophy and Social Science Planning Projects of Beijing(11JGB049)
文摘Creative agriculture,a new agricultural format formed by integrating agriculture,tourism and creative industries,is an important part of the urban modern agriculture. Proceeding from the functional position as an ecological conservation area,Miyun creative agriculture has obtained rapid growth,relying on its ecological resources,agricultural resources,tourist resources and leisure industry advantages. But there are still some problems. On the basis of analyzing the advantages and problems of creative agriculture in Miyun,the paper put forward the basic principles and thought pattern of developing creative agriculture in there. Besides,several countermeasures in terms of resources integration, scientific planning,exploring local cultural resources,developing theme products,constructing industrial chain,carrying out project design and creative planning,creating creative agricultural advantage brand are put forward.
基金This study was supported by the project of National Natural Science Foundation of china （No. 90610030）.
文摘Based on the exploring of SWAT model suitability in Hei River Basin, this paper analyze quantitatively and compare non-point source pollution loads occurred under different land use scene. At last, the following conclusion can be attained： （1） Land use change exerts tremendous influence on non-point source pollution. Since forest land can save water and reduce soil loss, which decreases greatly the source of non-point source pollution; （2） Strengthening land management and promoting reasonable land use, especially the over 15 degree slope farmland, will be the effective measure to control non-point source pollution and protect the quality of water in the Hei River basin; （3） The best land use situation in Hei River basin should be like the following modes： complying with national water source protection policy, gradual evacuation of river basin population, returning all the sloping farmland which is above 15 degree to forest land, allowing the existence of few farming land below 15 slope degree on the premise that the drinking water quality standard is reached, no unused land, good vegetation covering situation. At then, total nitrogen load is 13.25 kg, total phosphate load is 3.29 kg, which means it will not contaminate
基金the financial support from the Natural Science Foundation of China (No. 20477041)
文摘A magnesia adsorbent was prepared from straw pulp black liquor and magnesium sulfate for the first time, and its adsorption of phenol from aqueous solution was examined. The characteristics of the adsorbent were tested through chemical analysis, surface analysis, X-ray diffraction and FT-IR spectroscopy. The effects of various factors, such as dose, adsorption time and adsorption temperature, on phenol adsorption behavior were studied. The results show that the adsorption processes can be fitted to the isotherm Langmuir model very well. It was found that the adsorption process was strongly influenced by temperature and the optimal temperature for phenol removal was 40 ℃. The optimum adsorption time was 10 min, and desorption would happen afterwards. Between the models of Langmuir and Freundlich, the adsorption process of phenol onto magnesia fitted the Langmuir equation better.
