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西南丘区农产品电子商务发展问题及对策研究——基于四川省绵阳市调研
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作者 马行智 刘强 《农业部管理干部学院学报》 2017年第4期28-34,共7页
农产品电子商务是目前现代农业发展的重要方式之一,也是振兴贫困地区的经济发展的重要手段。近年来四川省绵阳市在农产品电子商务方面作出了显著的成就,可是在发展过程中还存在一些问题,影响着当地经济发展和社会生活。通过总结绵阳市... 农产品电子商务是目前现代农业发展的重要方式之一,也是振兴贫困地区的经济发展的重要手段。近年来四川省绵阳市在农产品电子商务方面作出了显著的成就,可是在发展过程中还存在一些问题,影响着当地经济发展和社会生活。通过总结绵阳市农产品电子商务发展现状为基础,从电子商务的认识、物流服务、电商平台、电商人才、农产品标准与品牌以及电商法律权益保障等方面,分析了绵阳市农产品电子商务发展存在的问题及其后果,并提出促进我国西南丘陵地区农产品电子商务发展对策建议,以期为推动我国西南丘陵地区农产品电子商务发展壮大提供借鉴意义。 展开更多
关键词 西南丘区 农产品 电子商务 绵阳市
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西南滨海低丘区农村水系综合整治方案研究 被引量:2
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作者 唐岗 孔猛 +2 位作者 郝程程 李科杰 黄新华 《中国水利》 2021年第12期47-50,共4页
合浦县位于广西东南部沿海,水系发达,具有西南滨海低丘特点。在分析西南滨海低丘河网区农村水系特点的基础上,以合浦县水系连通及农村水系综合整治试点为例,提出了西南滨海低丘河网区农村水系综合整治的治理思路、措施和管护机制,可为... 合浦县位于广西东南部沿海,水系发达,具有西南滨海低丘特点。在分析西南滨海低丘河网区农村水系特点的基础上,以合浦县水系连通及农村水系综合整治试点为例,提出了西南滨海低丘河网区农村水系综合整治的治理思路、措施和管护机制,可为同类型地区开展农村水系综合整治提供借鉴。 展开更多
关键词 西南滨海低 农村水系综合整治 合浦县 试点 示范
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Changes of local agricultural landscape patterns induced by land consolidation in hilly and mountainous Southwestern China 被引量:1
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作者 张贞 魏朝富 《Journal of Chongqing University》 CAS 2009年第3期151-164,共14页
Land consolidation (LC), as a type of human disturbance, improves land production efficiency and changes landscape distribution through land parcel reallocation. The objective of this study was to comparatively analyz... Land consolidation (LC), as a type of human disturbance, improves land production efficiency and changes landscape distribution through land parcel reallocation. The objective of this study was to comparatively analyze the changes of landscape patches before and after a land consolidation project (LCP) and the effects of land levelling, irrigation and drainage work and road engineering on the landscape structure. FRAGSTAT3.3 and buffer zone analysis were used to investigate those changes. The results suggest that the heterogeneity of landscape depressed, and tended to simplification after LC. Dry land was the most highly variable land use pattern, and the change of forestland was least due to its locations at a gradient larger than 25°. LC resulted in a more rational use of land, and could be an important step in promoting rural development in depressed and fragmented agricultural areas through unused land exploitation, small-patch combination, irrigation and water conservancy, and road construction. Land levelling leveled off the gradient field surface and decreased the slope. The fragmentized patches were much more incorporated with increasing slope. On the other hand, the ridge of a field became longer so that the length of field surface and area of patch were increased. Land levelling regulated, simplified and combined patches, so that the complexity degree was reduced. It is found that the buffer distance of 35 m was a turning point of human disturbance by irrigation and drainage systems, and patches presented flaky distribution when the buffer distance was smaller than 35 m. Meanwhile, the distance range between 25 m to 50 m was an impressible area for road engineering, which was sensitive to human actions, and the changes of all landscape metrics were larger than those in other buffer zones. In general, LC not only reallocated fragmented parcels, but also improved agricultural conditions. 展开更多
关键词 land consolidation land use local agricultural landscape pattern landscape patch hilly and mountainous in Southwestern China
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Spatial and Temporal Patterns of Soil Nitrogen Distribution under Different Land Uses in a Watershed in the Hilly Area of Purple Soil,China 被引量:10
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作者 YANG Xiao-lin ZHU Bo LI Yi-ling 《Journal of Mountain Science》 SCIE CSCD 2013年第3期410-417,共8页
Quantification of soil spatial and temporal variability at watershed scale is important in ecological modeling, precision agriculture, and natural resources management. The spatio-temporal variations of soil nitrogen ... Quantification of soil spatial and temporal variability at watershed scale is important in ecological modeling, precision agriculture, and natural resources management. The spatio-temporal variations of soil nitrogen under different land uses in a small watershed (12.10 km^2) in the hilly area of purple soil at the upper reaches of the Yangtze River in southwestern China were investigated by using conventional statistics, geostatistics, and a geographical information system in order to provide information for land management and control of environmental issues. A total of 552 soil samples (o to 15 cm) from 276 sites within the watershed were collected in April and August of 2o11, and analyzed for soil total nitrogen (STN) and nitrate nitrogen (NO3-N). We compared spatial variations of STN and NO3-N under different land uses as well as the temporal variations in April (dry season) and August (rainy season). Results showed that STN contents were deeply affected by land-use types; median STN values ranged from 0.94to 1.27g.kg-I, and STN contents decreased in the following order: paddy field 〉 foresfland 〉 sloping cropland. No significant difference was found for STN contents between April and August under the same land use. However, NO3- N contents were 23.26, 10.58, and 26.19 mg·kg^-1 in April, and 1.34, 8.51, and 3.00 mg·kg^-1 in August for the paddy field, sloping cropland and forestland, respectively. Nugget ratios for STN indicatedmoderate spatial dependence in the paddy field and sloping cropland, and a strong spatial dependence in forestland. The processes of nitrogen movement, transformation, absorption of plant were deeply influenced by land use types; as a result, great changes of soil nitrogen levels at spatial and temporal scales were demonstrated in the studied watershed. 展开更多
关键词 Land use Soil nitrogen Spatial variation Temporal variation Watershed scale
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Technical efficiency and its determinants of the various cropping systems in the purple-soiled,hilly region of southwestern China 被引量:2
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作者 ZHANG Shi-chao WEI Chao-fu +1 位作者 SHAO Jing-an WU Zhao-juan 《Journal of Mountain Science》 SCIE CSCD 2016年第12期2205-2223,共19页
This study examines the technical efficiency(TE) differences among typical cropping systems of smallholder farmers in the purple-soiled hilly region of southwestern China.Household-,plot-,and crop-level data and commu... This study examines the technical efficiency(TE) differences among typical cropping systems of smallholder farmers in the purple-soiled hilly region of southwestern China.Household-,plot-,and crop-level data and community surveys were conducted to explore TE levels and determinants of typical cropping systems by using a translog stochastic frontier production function.Results indicate significant difference in TE and its determinants among cropping systems.The mean TEs of the rice cropping system(R),the rice-rape cropping system(RR),the rice-rape-potato cropping system(RRP),and the oil cropping system(O) are0.86,0.90,0.84,and 0.85,respectively,which are over 1.17 times higher than those of the maize-sweet potato-other crop cropping system(MSO) and the maize-sweet potato-wheat cropping system(MSW) at0.78 and 0.69,respectively.Moreover,Technical inefficiency(TIE) of different cropping systems is significantly affected by characteristics of the household as well as plot.However,the impact of land quality,mechanical cultivation conditions,crop structure,farming system,farm radius,household type,cultivated land area per capita,and annual household income per capitalon TIE vary by cropping system.Additionally,output elasticity of land,labor,and capital,as a group,is greater than the one of agricultural machinery and irrigation.Finally,when household-owned effective agricultural labor is at full farming capacity,optimal plot sizes for the R,RR,RRP,MSO,MSW,and 0 cropping systems are 1.12hm^2,0.35 hm^2,0.25 hm^2,2.82 hm^2,1.87 hm^2,and 1.17hm^2,respectively. 展开更多
关键词 Cropping systems Technical efficiency Land management Plot Purple-soil Stochastic Frontier Production Function
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