使用AAS法和ICP-AES法,测定玉米不同生育期土壤中各形态和玉米中各部位铜含量,探究炭基有机肥与木醋液对污灌区土壤中铜形态的转化及玉米对铜吸收、富集、转移的影响。结果表明,不同用量炭基有机肥配施菌糠木醋液后提高了土壤中pH值,铜...使用AAS法和ICP-AES法,测定玉米不同生育期土壤中各形态和玉米中各部位铜含量,探究炭基有机肥与木醋液对污灌区土壤中铜形态的转化及玉米对铜吸收、富集、转移的影响。结果表明,不同用量炭基有机肥配施菌糠木醋液后提高了土壤中pH值,铜各种形态的含量和比例发生了变化,促进了可交换态、铁锰氧化态和有机结合态向碳酸盐结合态和残渣态的转化,与对照相比,100 g炭基有机肥(CF)和100 g CF+木醋液处理的可交换态铜含量分别显著下降了18.78%,25.11%,残渣态含量分别显著增加了46.04%,47.97%。随着炭基有机肥施用量的增加,玉米地上部(茎、叶、穗)铜的含量下降,地下部上升;配施菌糠木醋液后降低了各部位铜的含量。各处理对各部位富集系数与对各部位铜含量影响一致,300 g CF和300 g CF+木醋液处理的转移系数分别降低了26.79%,35.17%,很好地抑制了Cu从根部向地上部的转移。施用适量炭基有机肥可以有效降低土壤中可交换态铜的含量及铜的生物有效性,配施木醋液后效果更好,因此,炭基有机肥配施菌糠木醋液可作为铜污染土壤的优质改良剂。展开更多
Based on wood structure of ancient buildings in China,the paper considers that Chinese ancient people have selected wood as the architectural material due to its characteristics and some necessity.After the analysis o...Based on wood structure of ancient buildings in China,the paper considers that Chinese ancient people have selected wood as the architectural material due to its characteristics and some necessity.After the analysis of architectural features of traditional settlements,it has found that Chinese ancient people tend to draw on local materials for construction.Then,it further analyzes the adaptability of Chinese wood structure,and the flexibility and complexity of its plane layout.By combining with Chinese's life value,the eternal significance contained in wood structure has been explained based on material and spiritual level.From the perspective of natural selection,technological advancement,spatial advantage,spiritual value and aesthetic need,the paper tries to find causes for wood structure as architectural materials,aiming to objectively treat the effort of Chinese ancient people made in the progress history of human civilization.展开更多
In this paper the wood was regarded as the thermodynamie system. Using solid theory of crystalline state and thermodynamic theory, based on the expression of wood thermal capacity theory, the basic thermodynamic funct...In this paper the wood was regarded as the thermodynamie system. Using solid theory of crystalline state and thermodynamic theory, based on the expression of wood thermal capacity theory, the basic thermodynamic function of wood was derived. This paper emphasized the state equation of wood, brought it into Greuneisen form and comparcd the thcorctical value with the experimental value. And the relative error was in about 5%. This indicatcd that the results of the theoretical studies were right, explored a new way on the quantitative study of the physical characters of wood.展开更多
文摘使用AAS法和ICP-AES法,测定玉米不同生育期土壤中各形态和玉米中各部位铜含量,探究炭基有机肥与木醋液对污灌区土壤中铜形态的转化及玉米对铜吸收、富集、转移的影响。结果表明,不同用量炭基有机肥配施菌糠木醋液后提高了土壤中pH值,铜各种形态的含量和比例发生了变化,促进了可交换态、铁锰氧化态和有机结合态向碳酸盐结合态和残渣态的转化,与对照相比,100 g炭基有机肥(CF)和100 g CF+木醋液处理的可交换态铜含量分别显著下降了18.78%,25.11%,残渣态含量分别显著增加了46.04%,47.97%。随着炭基有机肥施用量的增加,玉米地上部(茎、叶、穗)铜的含量下降,地下部上升;配施菌糠木醋液后降低了各部位铜的含量。各处理对各部位富集系数与对各部位铜含量影响一致,300 g CF和300 g CF+木醋液处理的转移系数分别降低了26.79%,35.17%,很好地抑制了Cu从根部向地上部的转移。施用适量炭基有机肥可以有效降低土壤中可交换态铜的含量及铜的生物有效性,配施木醋液后效果更好,因此,炭基有机肥配施菌糠木醋液可作为铜污染土壤的优质改良剂。
基金Supported by Independent Scientific Research Fund of Dalian Nationalities University(DC10030205)~~
文摘Based on wood structure of ancient buildings in China,the paper considers that Chinese ancient people have selected wood as the architectural material due to its characteristics and some necessity.After the analysis of architectural features of traditional settlements,it has found that Chinese ancient people tend to draw on local materials for construction.Then,it further analyzes the adaptability of Chinese wood structure,and the flexibility and complexity of its plane layout.By combining with Chinese's life value,the eternal significance contained in wood structure has been explained based on material and spiritual level.From the perspective of natural selection,technological advancement,spatial advantage,spiritual value and aesthetic need,the paper tries to find causes for wood structure as architectural materials,aiming to objectively treat the effort of Chinese ancient people made in the progress history of human civilization.
文摘In this paper the wood was regarded as the thermodynamie system. Using solid theory of crystalline state and thermodynamic theory, based on the expression of wood thermal capacity theory, the basic thermodynamic function of wood was derived. This paper emphasized the state equation of wood, brought it into Greuneisen form and comparcd the thcorctical value with the experimental value. And the relative error was in about 5%. This indicatcd that the results of the theoretical studies were right, explored a new way on the quantitative study of the physical characters of wood.
