[Objective] This study was to investigate the effects of different irrigation amount on water consumption and water use efficiency of greenhouse cucumber.[Method]Under the condition of drip irrigation with different w...[Objective] This study was to investigate the effects of different irrigation amount on water consumption and water use efficiency of greenhouse cucumber.[Method]Under the condition of drip irrigation with different water amounts in sunlight greenhouse of the arid areas in Ningxia,the soil water was measured and the water consumption of crop was calculated.[Result]When irrigation amount was 563 mm,the water consumption as a whole gradually increased with the delay of growth period,reached peak during the thriving stage of fruit setting,and then gradually declined;in each treatment,the daily water consumption increased with the increasing of irrigation amount during each growth period.However,the consumption of soil moisture reduced with the significant increase of irrigation.563 mm of irrigation amount could meet the water requirements of cucumber and began to add water to soil,and water utilization efficiency could reach 33.4 kg/m3.[Conclusion]The research had provided theoretical basis for water management in the production process of greenhouse cucumber.展开更多
This study analyzed economic value of maize production among irrigation farmers in Orire Local Government, Oyo State, Nigeria. The objectives of this study are to： identify the most important resources used by the fa...This study analyzed economic value of maize production among irrigation farmers in Orire Local Government, Oyo State, Nigeria. The objectives of this study are to： identify the most important resources used by the farmers in maize production; estimate the production function in order to determine the economic efficiency of different resource used in maize production. The data were obtained through a survey of 80 farmers, comparing farmers using pump and those using shadoof methods of irrigation for maize cultivation. Simple descriptive statistics and Cobb-Douglas production function used revealed that fertilizer was underutilized. The marginal productivity of labour was positive but lower than the average acquisition cost for both techniques of irrigation. Both primary and secondary data were used for the study. Well structured questionnaire and interview schedule were used as approaches to collect data from respondents. The results showed that irrigation users were small-scale farmers, cultivating small hectare of land using simple farm tools, practicing pump irrigation or calabash system. Regression analysis revealed that land, labour purchase inputs had a positive relationship with the output of the enterprises, the linear programming analysis revealed that opportunities existed for increasing profit through resources re-organization, budgetary analysis was used to show that irrigation was profitable.展开更多
The study examined the levels of resource-use efficiency of rice farmers unde,r irrigation method in Dadinkowa, Gombe state of Nigeria. Using questionnaire, data were collected during the year 2010 irrigation season f...The study examined the levels of resource-use efficiency of rice farmers unde,r irrigation method in Dadinkowa, Gombe state of Nigeria. Using questionnaire, data were collected during the year 2010 irrigation season from 120 randomly sampled rice irrigators and the data were analyzed using multiple regression and marginal analyses. Results showed that significant factors influencing irrigated rice production were labour （P 〈 0.001）, land and fertilizer （P 〈 0.01）. In addition, the coefficient of determination （R2）, the F-ratio and the standard error of the mean （S） were found to be 0.471, 16.37＊＊＊ and 8.908, respectively. The results also indicated that efficiency values of land, seeds, fertilizer and labour were 1.234, 0.498, 2.352 and 1.620, respectively. Finally, it was found that resource-use among the farmers were not efficient thus equipment, land, fertilizer and labour inputs shall be increased by 78.3%, 18.9%, 57.5% and 38.3%, respectively, while seed input shall be reduced by 50.2% for the farmers to attain optimal resource utilization.展开更多
This paper looks at the agricultural heritage potential of the tameike reservoirs in Japan,through a case study of the Kunisaki Peninsula,which was recognized as a Globally Important Agricultural Heritage System （GI...This paper looks at the agricultural heritage potential of the tameike reservoirs in Japan,through a case study of the Kunisaki Peninsula,which was recognized as a Globally Important Agricultural Heritage System （GIAHS） in May,2013.The ＂tameike＂ in this area are small scale ponds storing spring water or water flowing through the short and rapid rivers of the area.Tameike construction in Kunisaki is found to be closely associated with the spread of wet rice cultivation and forestry.Most existing reservoirs were built during the Edo Period （1603-1867）,and were managed through traditional farming knowhow till the postwar period.However,rapid decline in the use and ecosystem functions of these reservoirs ensued from the years of economic development,and at present,total number of these reservoirs has fallen to nearly one-third,compared to the pre-Meiji time.The GIAHS initiative is trying to reevaluate the ecosystem functions and knowledge systems associated with these reservoirs and link them to rural revitalization efforts.This article is based on both literature survey and field based research with regional coordinators,and comes to the conclusion that proper management of these reservoirs can successfully reinvigorate a culture of resource circulation,that defined the agri-heritage of Kunisaki area in historical times.展开更多
基金Supported by National Key Technology R&D Program of China(2007BAD88B06)~~
文摘[Objective] This study was to investigate the effects of different irrigation amount on water consumption and water use efficiency of greenhouse cucumber.[Method]Under the condition of drip irrigation with different water amounts in sunlight greenhouse of the arid areas in Ningxia,the soil water was measured and the water consumption of crop was calculated.[Result]When irrigation amount was 563 mm,the water consumption as a whole gradually increased with the delay of growth period,reached peak during the thriving stage of fruit setting,and then gradually declined;in each treatment,the daily water consumption increased with the increasing of irrigation amount during each growth period.However,the consumption of soil moisture reduced with the significant increase of irrigation.563 mm of irrigation amount could meet the water requirements of cucumber and began to add water to soil,and water utilization efficiency could reach 33.4 kg/m3.[Conclusion]The research had provided theoretical basis for water management in the production process of greenhouse cucumber.
文摘This study analyzed economic value of maize production among irrigation farmers in Orire Local Government, Oyo State, Nigeria. The objectives of this study are to： identify the most important resources used by the farmers in maize production; estimate the production function in order to determine the economic efficiency of different resource used in maize production. The data were obtained through a survey of 80 farmers, comparing farmers using pump and those using shadoof methods of irrigation for maize cultivation. Simple descriptive statistics and Cobb-Douglas production function used revealed that fertilizer was underutilized. The marginal productivity of labour was positive but lower than the average acquisition cost for both techniques of irrigation. Both primary and secondary data were used for the study. Well structured questionnaire and interview schedule were used as approaches to collect data from respondents. The results showed that irrigation users were small-scale farmers, cultivating small hectare of land using simple farm tools, practicing pump irrigation or calabash system. Regression analysis revealed that land, labour purchase inputs had a positive relationship with the output of the enterprises, the linear programming analysis revealed that opportunities existed for increasing profit through resources re-organization, budgetary analysis was used to show that irrigation was profitable.
文摘The study examined the levels of resource-use efficiency of rice farmers unde,r irrigation method in Dadinkowa, Gombe state of Nigeria. Using questionnaire, data were collected during the year 2010 irrigation season from 120 randomly sampled rice irrigators and the data were analyzed using multiple regression and marginal analyses. Results showed that significant factors influencing irrigated rice production were labour （P 〈 0.001）, land and fertilizer （P 〈 0.01）. In addition, the coefficient of determination （R2）, the F-ratio and the standard error of the mean （S） were found to be 0.471, 16.37＊＊＊ and 8.908, respectively. The results also indicated that efficiency values of land, seeds, fertilizer and labour were 1.234, 0.498, 2.352 and 1.620, respectively. Finally, it was found that resource-use among the farmers were not efficient thus equipment, land, fertilizer and labour inputs shall be increased by 78.3%, 18.9%, 57.5% and 38.3%, respectively, while seed input shall be reduced by 50.2% for the farmers to attain optimal resource utilization.
文摘This paper looks at the agricultural heritage potential of the tameike reservoirs in Japan,through a case study of the Kunisaki Peninsula,which was recognized as a Globally Important Agricultural Heritage System （GIAHS） in May,2013.The ＂tameike＂ in this area are small scale ponds storing spring water or water flowing through the short and rapid rivers of the area.Tameike construction in Kunisaki is found to be closely associated with the spread of wet rice cultivation and forestry.Most existing reservoirs were built during the Edo Period （1603-1867）,and were managed through traditional farming knowhow till the postwar period.However,rapid decline in the use and ecosystem functions of these reservoirs ensued from the years of economic development,and at present,total number of these reservoirs has fallen to nearly one-third,compared to the pre-Meiji time.The GIAHS initiative is trying to reevaluate the ecosystem functions and knowledge systems associated with these reservoirs and link them to rural revitalization efforts.This article is based on both literature survey and field based research with regional coordinators,and comes to the conclusion that proper management of these reservoirs can successfully reinvigorate a culture of resource circulation,that defined the agri-heritage of Kunisaki area in historical times.
