The eco-environmental restoration has been a chief task of the western development strategies carried out by the central and local governments of China since the late 1990s, and the ecological de-farming has been rega...The eco-environmental restoration has been a chief task of the western development strategies carried out by the central and local governments of China since the late 1990s, and the ecological de-farming has been regarded as a powerful measure for the ecological restoration in the Loess Plateau and the upper reaches of the Yangtze River. "Relieving and de-farming" (RD) and "rebuilding terrace and de-farming" (RTD) are two more mature ones among various de-farming modes. Taking the loess hilly-gully region as a case, this paper summarized the basic characteristics of RD and RTD modes, calculated the sizes of de-farming slope farmland, rebuilt terraces, enlarged garden plots and restored vegetation, and compared the differences of two modes in terms of de-farming area, ecological reestablishment index, investment demand amount and benefits. The results showed that RTD mode has many advantages, including suitable investment, sufficient grain supply and great benefits, and will be the best ecological reestablishment mode in the loess hilly-gully region, and RD mode which is being carried out in this region should be replaced by RTD mode as soon as possible.展开更多
Modern ecological breeding has the characteristics of protecting the ecological environment,health,nutrition,delicious,and so on.In the ecological breeding of traditional breeding chicken,using non antibiotic breeding...Modern ecological breeding has the characteristics of protecting the ecological environment,health,nutrition,delicious,and so on.In the ecological breeding of traditional breeding chicken,using non antibiotic breeding,traditional Chinese medicine and other breeding technologies can not only obtain green,non-harmful and safe food products,but also reduce the cost of farmers and provide breeding efficiency This is a sustainable development path.This paper gave a brief overview of this field.展开更多
Based on the analysis and summary of traditional energy ecological footprint （EEF） and its research development at home and abroad, a modified method to measure energy ecological footprint is proposed by combining e...Based on the analysis and summary of traditional energy ecological footprint （EEF） and its research development at home and abroad, a modified method to measure energy ecological footprint is proposed by combining energy ecological footprint with the area of biological productive forest land from a standpoint of material flow ＂energy consumption - CO2 emissions - woodland absorption＂, and is used to measure the energy ecological footprint and carbon emissions in Tianjin City from 1995 to 2010. The results show that EEF per capita has increased from 1. 739 8 to 3.078 5 ghm2 during 1995 -2010, and has a significant correlation with GDP per capita in annual average growth rate （R~ =0. 877 6, P 〈0.05）. Among the compositions of EEF, the percentage of coal footprint has decreased from 62% to 50%, while the others have increased to some de- gree. Meanwhile, the output value of EEF has increased from 5 687.71 to 23 061.93 yuan/ghm2, and the elastic coefficient of EEF which has in- creased from 0.15 to 0.69 shows approximate cyclical fluctuations. It is indicated that with the adjustment of energy structure in Tianjin in the past 16 years, energy utilization efficiency has been becoming increasingly bigger. However, ecological pressure on the environment is a growing problem in the next few years, so it is urgent to shift energy use patterns and increase energy conservation efforts for Tianjin City.展开更多
基金National Natural Science Foundation of China No.40371051+1 种基金 Knowledge Innovation Project of Chinese Academy of Sciences No.KZCX1-6-2-6
文摘The eco-environmental restoration has been a chief task of the western development strategies carried out by the central and local governments of China since the late 1990s, and the ecological de-farming has been regarded as a powerful measure for the ecological restoration in the Loess Plateau and the upper reaches of the Yangtze River. "Relieving and de-farming" (RD) and "rebuilding terrace and de-farming" (RTD) are two more mature ones among various de-farming modes. Taking the loess hilly-gully region as a case, this paper summarized the basic characteristics of RD and RTD modes, calculated the sizes of de-farming slope farmland, rebuilt terraces, enlarged garden plots and restored vegetation, and compared the differences of two modes in terms of de-farming area, ecological reestablishment index, investment demand amount and benefits. The results showed that RTD mode has many advantages, including suitable investment, sufficient grain supply and great benefits, and will be the best ecological reestablishment mode in the loess hilly-gully region, and RD mode which is being carried out in this region should be replaced by RTD mode as soon as possible.
基金Supported by International Science and Technology Innovation Cooperation Project of Sichuan Province(2020YFH0202)Key Research and Development Project of Science and Technology Plan of Liangshan Prefecture(20ZDYF0002)。
文摘Modern ecological breeding has the characteristics of protecting the ecological environment,health,nutrition,delicious,and so on.In the ecological breeding of traditional breeding chicken,using non antibiotic breeding,traditional Chinese medicine and other breeding technologies can not only obtain green,non-harmful and safe food products,but also reduce the cost of farmers and provide breeding efficiency This is a sustainable development path.This paper gave a brief overview of this field.
文摘Based on the analysis and summary of traditional energy ecological footprint （EEF） and its research development at home and abroad, a modified method to measure energy ecological footprint is proposed by combining energy ecological footprint with the area of biological productive forest land from a standpoint of material flow ＂energy consumption - CO2 emissions - woodland absorption＂, and is used to measure the energy ecological footprint and carbon emissions in Tianjin City from 1995 to 2010. The results show that EEF per capita has increased from 1. 739 8 to 3.078 5 ghm2 during 1995 -2010, and has a significant correlation with GDP per capita in annual average growth rate （R~ =0. 877 6, P 〈0.05）. Among the compositions of EEF, the percentage of coal footprint has decreased from 62% to 50%, while the others have increased to some de- gree. Meanwhile, the output value of EEF has increased from 5 687.71 to 23 061.93 yuan/ghm2, and the elastic coefficient of EEF which has in- creased from 0.15 to 0.69 shows approximate cyclical fluctuations. It is indicated that with the adjustment of energy structure in Tianjin in the past 16 years, energy utilization efficiency has been becoming increasingly bigger. However, ecological pressure on the environment is a growing problem in the next few years, so it is urgent to shift energy use patterns and increase energy conservation efforts for Tianjin City.
