This study explores the role of a traditional tillage method,i.e.,compensatory hoeing,for sustainable agro-ecosystem management in the hilly areas of the Chongqing municipality,south-western China.To validate the effe...This study explores the role of a traditional tillage method,i.e.,compensatory hoeing,for sustainable agro-ecosystem management in the hilly areas of the Chongqing municipality,south-western China.To validate the effects of compensatory tillage on the terraced slopes,the tillage method of noncompensatory hoeing was conducted on a linear slope.To acquire information about 137 Cs inventories and soil texture,soil samples were collected by a core sampler with a 6.8-cm diameter at 5.0-m intervals along the toposequence and the linear slope in the dry season(March) of 2007.Meanwhile,a tillage erosion model was used for evaluating the spatial pattern of tillage erosion.The 137 Cs data showed that on the terraced slope,soil was lost from the upper slope,and soil deposition occurred at the toe slope positions on each terrace.As a result,abrupt changes in the 137 Cs inventories of soil were found over short distances between two sides of terrace boundaries.Results obtained from the tillage erosion model and the 137 Cs data indicate that soil redistribution mainly results from tillage erosion in the terraced landscape.Consecutive non-compensatory tillage caused soil redistribution on the linear slope,resulting in thin soil profile disappearing at the top and soil accumulating at the bottom positions of the linear slope.This result further validates that compensatory tillage could avoid the complete erosion of the thin soil layer at the summit position.Therefore,this traditional tillage.method,i.e.,compensatory tillage,has maintained the soil quality at the summit of the slope in the past decades.展开更多
Urbanization process to change the pattern of population distribution in rural areas to strengthen the flow of farmers in the city and rural areas; national industrial structural adjustment, the gradual decline in per...Urbanization process to change the pattern of population distribution in rural areas to strengthen the flow of farmers in the city and rural areas; national industrial structural adjustment, the gradual decline in per capital income of farmers; yearly increase in medical costs, making the farmers a serious shortage of personal medical capacity, Disease caused by poverty, due to illness back to poverty ＂phenomenon is obvious. Based on the historical background of the development of rural medical security, based on the perspective of ＂supply＂ of modem medical service, this paper analyzes the economic factors and policies of the farmers＇ ＂difficult to see medical treatment＂, and the data analysis is carried out according to the latest social data. Factors, and put forward the corresponding improvement measures.展开更多
基金provided by the Special Support Foundation of the Institute of Mountain Hazards and Environment (IMHE)the 100 Talents Programme of IMHE,Chinese Academy of Sciences (No. SDSQB-2011-01)
文摘This study explores the role of a traditional tillage method,i.e.,compensatory hoeing,for sustainable agro-ecosystem management in the hilly areas of the Chongqing municipality,south-western China.To validate the effects of compensatory tillage on the terraced slopes,the tillage method of noncompensatory hoeing was conducted on a linear slope.To acquire information about 137 Cs inventories and soil texture,soil samples were collected by a core sampler with a 6.8-cm diameter at 5.0-m intervals along the toposequence and the linear slope in the dry season(March) of 2007.Meanwhile,a tillage erosion model was used for evaluating the spatial pattern of tillage erosion.The 137 Cs data showed that on the terraced slope,soil was lost from the upper slope,and soil deposition occurred at the toe slope positions on each terrace.As a result,abrupt changes in the 137 Cs inventories of soil were found over short distances between two sides of terrace boundaries.Results obtained from the tillage erosion model and the 137 Cs data indicate that soil redistribution mainly results from tillage erosion in the terraced landscape.Consecutive non-compensatory tillage caused soil redistribution on the linear slope,resulting in thin soil profile disappearing at the top and soil accumulating at the bottom positions of the linear slope.This result further validates that compensatory tillage could avoid the complete erosion of the thin soil layer at the summit position.Therefore,this traditional tillage.method,i.e.,compensatory tillage,has maintained the soil quality at the summit of the slope in the past decades.
文摘Urbanization process to change the pattern of population distribution in rural areas to strengthen the flow of farmers in the city and rural areas; national industrial structural adjustment, the gradual decline in per capital income of farmers; yearly increase in medical costs, making the farmers a serious shortage of personal medical capacity, Disease caused by poverty, due to illness back to poverty ＂phenomenon is obvious. Based on the historical background of the development of rural medical security, based on the perspective of ＂supply＂ of modem medical service, this paper analyzes the economic factors and policies of the farmers＇ ＂difficult to see medical treatment＂, and the data analysis is carried out according to the latest social data. Factors, and put forward the corresponding improvement measures.
