The most directly expressions of the relationships between human and nature lie in the relationships between human and water,human and soil( stone),human and vegetation( plant). Water,soil and vegetation are inter...The most directly expressions of the relationships between human and nature lie in the relationships between human and water,human and soil( stone),human and vegetation( plant). Water,soil and vegetation are interdependent,restricted coexisted and developed from one another,which are integrated and correlated. The history of human's survival and development on the earth is one related continuously with water,soil( stone),vegetation( plant),which involves with the protection and reasonable utilization of water,soil and vegetation resources( also known as soil and water ecological resources),and it has summarized and accumulated abundant culture concerned with the harmonious coexistence of human with water,soil and vegetation,which is the soil and water ecological culture. All peoples of China have accumulated rich soil and water ecological culture in the long term,such as integrated view of nature,nature admiring,nature praising,nature protection and reasonable utilization of nature. It is especially important and urgent in the current times to carry forward soil and water ecological culture.展开更多
Based on the ongoing construction of water ecological civilization in China,the connotation and specific requirements of ecological civilization and ecological civilized city are analyzed in detail. Combining with pre...Based on the ongoing construction of water ecological civilization in China,the connotation and specific requirements of ecological civilization and ecological civilized city are analyzed in detail. Combining with present situation and characteristics of water resources,water environment and water culture in Northeast China,the main contents to be considered in the construction of water ecological civilization in Northeast China are discussed,which could provide the reference for construction of water ecological civilization city.展开更多
Hoagland's solution was used as water culture medium to study the effect of CO2 concentration on nitrate metabolism of wheat under natural light and light-shaded conditions. NO3^-N, NH4^+-N, nitrate reductase activi...Hoagland's solution was used as water culture medium to study the effect of CO2 concentration on nitrate metabolism of wheat under natural light and light-shaded conditions. NO3^-N, NH4^+-N, nitrate reductase activity, total uptake N by wheat plants during solution cultural period and total N in plants were determined for comprehensive evaluation of the effect. Results showed that under both natural light and light-shaded conditions, addition of CO2 increased NO3^-N uptake and its assimilative capabilities by plants. However, there were some difference between shoots and roots. With increase of CO2 concentration, the concentration of NO3^-N and NH4^+-N as well as nitrate reductase activity were all decreased for shoots while the difference was not so distinct in roots, and the nitrate reductase activity was not decreased, but increased. Since NO3^-N uptake by plants from the solution and the total N in plants were much higher by CO2 addition, it may be concluded that addition of CO2 has resulted in rise of nitrate absorption, assimilation and metabolism of wheat.展开更多
At first, the overview and value of cultural relics of Xiaoshao Seawall were introduced, and then the confusion of daily management and comprehensive improvement were analyzed. Finally, the enlightenment and reflectio...At first, the overview and value of cultural relics of Xiaoshao Seawall were introduced, and then the confusion of daily management and comprehensive improvement were analyzed. Finally, the enlightenment and reflection on the "butterfly change" of the seawall were discussed.展开更多
文摘The most directly expressions of the relationships between human and nature lie in the relationships between human and water,human and soil( stone),human and vegetation( plant). Water,soil and vegetation are interdependent,restricted coexisted and developed from one another,which are integrated and correlated. The history of human's survival and development on the earth is one related continuously with water,soil( stone),vegetation( plant),which involves with the protection and reasonable utilization of water,soil and vegetation resources( also known as soil and water ecological resources),and it has summarized and accumulated abundant culture concerned with the harmonious coexistence of human with water,soil and vegetation,which is the soil and water ecological culture. All peoples of China have accumulated rich soil and water ecological culture in the long term,such as integrated view of nature,nature admiring,nature praising,nature protection and reasonable utilization of nature. It is especially important and urgent in the current times to carry forward soil and water ecological culture.
文摘Based on the ongoing construction of water ecological civilization in China,the connotation and specific requirements of ecological civilization and ecological civilized city are analyzed in detail. Combining with present situation and characteristics of water resources,water environment and water culture in Northeast China,the main contents to be considered in the construction of water ecological civilization in Northeast China are discussed,which could provide the reference for construction of water ecological civilization city.
基金the projects(30230230 ,30070429)supported by the National Natural Science Foundation of China(NSFC) the project(G1999011707)supported by the National Key Basic Research Support Funds(NKBRSF)the NSFC and the NKBRSF for their kindness of supporting theseprojects.
文摘Hoagland's solution was used as water culture medium to study the effect of CO2 concentration on nitrate metabolism of wheat under natural light and light-shaded conditions. NO3^-N, NH4^+-N, nitrate reductase activity, total uptake N by wheat plants during solution cultural period and total N in plants were determined for comprehensive evaluation of the effect. Results showed that under both natural light and light-shaded conditions, addition of CO2 increased NO3^-N uptake and its assimilative capabilities by plants. However, there were some difference between shoots and roots. With increase of CO2 concentration, the concentration of NO3^-N and NH4^+-N as well as nitrate reductase activity were all decreased for shoots while the difference was not so distinct in roots, and the nitrate reductase activity was not decreased, but increased. Since NO3^-N uptake by plants from the solution and the total N in plants were much higher by CO2 addition, it may be concluded that addition of CO2 has resulted in rise of nitrate absorption, assimilation and metabolism of wheat.
文摘At first, the overview and value of cultural relics of Xiaoshao Seawall were introduced, and then the confusion of daily management and comprehensive improvement were analyzed. Finally, the enlightenment and reflection on the "butterfly change" of the seawall were discussed.