[Objection] The aim was to study application of channels constructed wetland in treatment of domestic sewages in new countryside. [Method] Supported by construction of new rural areas project in China, we surveyed on ...[Objection] The aim was to study application of channels constructed wetland in treatment of domestic sewages in new countryside. [Method] Supported by construction of new rural areas project in China, we surveyed on new rural areas in Gannan, Jiangxi Province, summarized source, characteristics and treatment of domestic sewage in countryside, and designed channels constructed wetland for sewage treatment. [Result] The technique is proven effective in sewage treatment. After the technique was conducted for a trial run for four months, removal rates of COD, TP and TN averaged 73.07%, 73.25% and 72.36%, respectively. After contin- uous sampling for six times, effluent COD was analyzed 20-35 mg/L, TP was 0.60- 1.19 mg/L and TN was 6.88-11.21 mg/L, better than that of Standard 1B ruled by Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. [Conclusion] Thanks for low investment, channels constructed wetland can be built by trans- formation of bottom land, proving a good way for treatment of diffuse pollution source and control of water non-point pollution.展开更多
The double moral hazard of ＂company ＋ farmer＂ and the time preference cost of company and farmer was analyzed. According to static game model, it re-vealed that the reason for low compliance rate of ＂company ＋ fa...The double moral hazard of ＂company ＋ farmer＂ and the time preference cost of company and farmer was analyzed. According to static game model, it re-vealed that the reason for low compliance rate of ＂company ＋ farmer＂ model was the existence of market risk, namely, the fluctuation of market price, and the stable market price in contracts was actualy a kind of interval, instead of a specific value. Furthermore, the effect of default penalty, market transaction cost and time prefer-ence cost on the stability of contract was studied. The results showed that default penalty, market transaction cost and time preference cost had positive influence on the price interval range of a contract.展开更多
Objective The incidence of cancer varies around the globe,especially between less-developed and developed regions.The aim of this study is to explore differences in cancer incidence between China and the USA. Methods ...Objective The incidence of cancer varies around the globe,especially between less-developed and developed regions.The aim of this study is to explore differences in cancer incidence between China and the USA. Methods Data were obtained from the GLOBOCAN 2008 database.Estimated numbers of new cancer cases in the USA were obtained from the American Cancer Society,while the numbers of cases in China,including those in urban and rural areas,were obtained from 36 cancer registries(2003-2005).Cancer incidence for major sites between China and the USA were analyzed. Results In China,lung cancer was the predominant type of cancer detected in males;in females,breast cancer was the main type of cancer.Gastrointestinal cancers,such as those of the liver,stomach,and esophagus,were more commonly seen in China than in the USA.A significant difference in the incidence of melanoma of the skin was observed between China and the USA.During comparison of differences in the age-standardized rates by world population(ASRWs) of major cancer sites between the two countries,4 sites in males(i.e.,nasopharynx,esophagus,stomach,and liver) and 6 sites in females(i.e.,nasopharynx,esophagus,stomach,liver, gallbladder,and cervix uteri) showed higher cancer incidence rates in China than in the USA. Conclusions Significant differences in cancer incidence sites were found between the two countries.Cancer may be prevented through public education and awareness.Programs to promote cancer prevention in China,especially those of the lung,breast,and gastrointestinal region,must also be implemented.展开更多
This study aimed to agronomically and morphologically characterize, as well as analyze the genetic divergence of Dilla ＆ Alghe x Timor hybrid progenies of the coffee germplasm bank of Minas Gerais in Brazil to improv...This study aimed to agronomically and morphologically characterize, as well as analyze the genetic divergence of Dilla ＆ Alghe x Timor hybrid progenies of the coffee germplasm bank of Minas Gerais in Brazil to improve the breeding and management schemes of the hybrids. Forty-two morpho-agronomic traits were evaluated and the generalized Mahalanobis distance was used to quantify the genetic divergence among progenies. Tocher clustering, unweighted pair-group method using arithmetic averages （UPGMA） method and canonical variation analysis were employed as clustering strategies. The Tocher and UPGMA methods have been separated the progenies into eight and five groups, respectively. Analysis of the relative contribution of each characteristic to genetic dissimilarity highlighted the characteristics of production in liters in 2009, production notes in 2009, and average uniformity of maturation in 2009 as those that contributed most to obtaining genetic divergence. The authors observed that the first three canonical variables accounted for over 99% of the total variance observed in the full set of analyzed characteristics. High variability was observed among the 15 progenies of Dilla ＆ Alghe × Timor hybrid progenies. The progenies MG0589 and MG0592, MG0593 and MG0589, MG0591 and MG0589, MG0589 and MG0588, MG0589 and MG0583 were the most suitable crosses for exploring the genetic variability in Dilla ＆ Alghe × Timor hybrid generated from the germplasm bank of Minas Gerais. Through these crossovers, it is expected to get new coffee cultivars with desirable agronomic characteristics, as resistant to Pseudomonas xyringae pv. garcae and some breeds ofHemileia vastatrix.展开更多
A household survey was carried out in Central Malawi to evaluate the goat marketing structure and systems in the rural areas using Nsundwe and Nkhoma areas in Lilongwe District as a case study. The analysis focused on...A household survey was carried out in Central Malawi to evaluate the goat marketing structure and systems in the rural areas using Nsundwe and Nkhoma areas in Lilongwe District as a case study. The analysis focused on identifying marketing systems of goats in Malawi by investigating the role of goats in an average Malawian rural household and how the current goat marketing systems affects that role. Goats play important role in Malawian rural households by way of providing food, income and as a capital reserve to be used in times critical times of food scarcity. The findings indicate that there is potential for goats to generate more income for the rural farmers, which can in turn help to improve household food security. The marketing system however apparently does not favour the farmers. The farmers seem not to know goat prices beyond the rural markets and hence have inadequate negotiating power to sell at optimum prices. Middlemen bought from farmers and finally sold the goats to urban consumers and retail shops. From the analysis, middlemen seemed to control the goat marketing system. Urban butchers sold the goats at 58% more than the value of farmers while retail shops sold at 137% more than the value of farmers. The differences reflect value-adding activities done at butchers and retail shops levels as well as transportation costs and profit margins. Though farmers may not engage in value adding, the finding implies that they would fetch more money if they supplied directly to the retail shops than to the middlemen. With access to more market information, they could also increase their bargaining power information with middlemen and sell the goats at relatively higher prices than the current. This paper details the results of the study.展开更多
基金Supported by Project of the National Eleventh-Five Year Research Program of China(2008BAD96B04)~~
文摘[Objection] The aim was to study application of channels constructed wetland in treatment of domestic sewages in new countryside. [Method] Supported by construction of new rural areas project in China, we surveyed on new rural areas in Gannan, Jiangxi Province, summarized source, characteristics and treatment of domestic sewage in countryside, and designed channels constructed wetland for sewage treatment. [Result] The technique is proven effective in sewage treatment. After the technique was conducted for a trial run for four months, removal rates of COD, TP and TN averaged 73.07%, 73.25% and 72.36%, respectively. After contin- uous sampling for six times, effluent COD was analyzed 20-35 mg/L, TP was 0.60- 1.19 mg/L and TN was 6.88-11.21 mg/L, better than that of Standard 1B ruled by Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. [Conclusion] Thanks for low investment, channels constructed wetland can be built by trans- formation of bottom land, proving a good way for treatment of diffuse pollution source and control of water non-point pollution.
基金Supported by Humanities and Social Sciences of Ministry of Education(12YJC630050)Soft Science Bidding Project of Ministry of Agriculture(20140203)+1 种基金Jiangxi Soft Science Fund(20141BBA10065)Jiangxi’s Jiangxi Provincial Education Department(GJJ13727)~~
文摘The double moral hazard of ＂company ＋ farmer＂ and the time preference cost of company and farmer was analyzed. According to static game model, it re-vealed that the reason for low compliance rate of ＂company ＋ farmer＂ model was the existence of market risk, namely, the fluctuation of market price, and the stable market price in contracts was actualy a kind of interval, instead of a specific value. Furthermore, the effect of default penalty, market transaction cost and time prefer-ence cost on the stability of contract was studied. The results showed that default penalty, market transaction cost and time preference cost had positive influence on the price interval range of a contract.
文摘Objective The incidence of cancer varies around the globe,especially between less-developed and developed regions.The aim of this study is to explore differences in cancer incidence between China and the USA. Methods Data were obtained from the GLOBOCAN 2008 database.Estimated numbers of new cancer cases in the USA were obtained from the American Cancer Society,while the numbers of cases in China,including those in urban and rural areas,were obtained from 36 cancer registries(2003-2005).Cancer incidence for major sites between China and the USA were analyzed. Results In China,lung cancer was the predominant type of cancer detected in males;in females,breast cancer was the main type of cancer.Gastrointestinal cancers,such as those of the liver,stomach,and esophagus,were more commonly seen in China than in the USA.A significant difference in the incidence of melanoma of the skin was observed between China and the USA.During comparison of differences in the age-standardized rates by world population(ASRWs) of major cancer sites between the two countries,4 sites in males(i.e.,nasopharynx,esophagus,stomach,and liver) and 6 sites in females(i.e.,nasopharynx,esophagus,stomach,liver, gallbladder,and cervix uteri) showed higher cancer incidence rates in China than in the USA. Conclusions Significant differences in cancer incidence sites were found between the two countries.Cancer may be prevented through public education and awareness.Programs to promote cancer prevention in China,especially those of the lung,breast,and gastrointestinal region,must also be implemented.
文摘This study aimed to agronomically and morphologically characterize, as well as analyze the genetic divergence of Dilla ＆ Alghe x Timor hybrid progenies of the coffee germplasm bank of Minas Gerais in Brazil to improve the breeding and management schemes of the hybrids. Forty-two morpho-agronomic traits were evaluated and the generalized Mahalanobis distance was used to quantify the genetic divergence among progenies. Tocher clustering, unweighted pair-group method using arithmetic averages （UPGMA） method and canonical variation analysis were employed as clustering strategies. The Tocher and UPGMA methods have been separated the progenies into eight and five groups, respectively. Analysis of the relative contribution of each characteristic to genetic dissimilarity highlighted the characteristics of production in liters in 2009, production notes in 2009, and average uniformity of maturation in 2009 as those that contributed most to obtaining genetic divergence. The authors observed that the first three canonical variables accounted for over 99% of the total variance observed in the full set of analyzed characteristics. High variability was observed among the 15 progenies of Dilla ＆ Alghe × Timor hybrid progenies. The progenies MG0589 and MG0592, MG0593 and MG0589, MG0591 and MG0589, MG0589 and MG0588, MG0589 and MG0583 were the most suitable crosses for exploring the genetic variability in Dilla ＆ Alghe × Timor hybrid generated from the germplasm bank of Minas Gerais. Through these crossovers, it is expected to get new coffee cultivars with desirable agronomic characteristics, as resistant to Pseudomonas xyringae pv. garcae and some breeds ofHemileia vastatrix.
文摘A household survey was carried out in Central Malawi to evaluate the goat marketing structure and systems in the rural areas using Nsundwe and Nkhoma areas in Lilongwe District as a case study. The analysis focused on identifying marketing systems of goats in Malawi by investigating the role of goats in an average Malawian rural household and how the current goat marketing systems affects that role. Goats play important role in Malawian rural households by way of providing food, income and as a capital reserve to be used in times critical times of food scarcity. The findings indicate that there is potential for goats to generate more income for the rural farmers, which can in turn help to improve household food security. The marketing system however apparently does not favour the farmers. The farmers seem not to know goat prices beyond the rural markets and hence have inadequate negotiating power to sell at optimum prices. Middlemen bought from farmers and finally sold the goats to urban consumers and retail shops. From the analysis, middlemen seemed to control the goat marketing system. Urban butchers sold the goats at 58% more than the value of farmers while retail shops sold at 137% more than the value of farmers. The differences reflect value-adding activities done at butchers and retail shops levels as well as transportation costs and profit margins. Though farmers may not engage in value adding, the finding implies that they would fetch more money if they supplied directly to the retail shops than to the middlemen. With access to more market information, they could also increase their bargaining power information with middlemen and sell the goats at relatively higher prices than the current. This paper details the results of the study.
