Spatiotemporal interaction pattern of the Beijing agricultural product circulation

Identifying the spatiotemporal interaction pattern of agricultural product circulation(APC)is crucial for agricultural resource adjustment and food security.Current studies are mostly based on static statistical data over an entire year or a specific period,which cannot describe the spatial pattern of APC and its seasonal variation on a fine spatiotemporal scale.Thus,this study extracts an APC trip chain based on national truck trajectory data and constructs the flow network of the Beijing APC with the city as the spatial unit and the season as the temporal unit.The spatial interaction pattern and seasonal variation in APC are then analyzed from the network spatial form,city node function role,and transportation corridors.The results are as follows:(1)Compared with methods based on static statistical data,the proposed method provides a more complete and refined depiction of the spatiotemporal interaction pattern of APC.(2)The flow network of the Beijing APC involves 316 cities in China,of which 143 cities play a major role with typical seasonal characteristics.These cities can be divided into perennial core cities,perennial major cities,core cities in winter-spring,major cities in winter-spring,core cities in summer-autumn,and major cities in summer-autumn,contributing 2.6%-40.3%to the Beijing APC.(3)There are 6 transportation corridors for the Beijing APC.The Beijing-Tianjin-Hebei corridor and coastal corridor contribute 53.5%and 12.8%of the annual supply,respectively,with a balanced supply in all seasons.The Beijing-Kunming corridor and Beijing-Guangzhou corridor contribute 14.3%and 9.0%,respectively,with much higher supplies in winter and spring.The northeast and northwest corridors contribute 7.3%and 3.3%,respectively,mainly in the summer and autumn.These results help deepen the understanding of agricultural product supply patterns and provide a reference for the design and optimization of agricultural product transportation routes.

Circulation Service System for the Agricultural Products in Shandong

The construction and improvement of agricultural product circulation is one of the important solutions to the issues of agriculture. Although great achievements have been made in the construction of agricultural product, many problems still exist in the basis, principal role and service contents of service system. It needs the great improvement on infrastructure, service modes and management of service system to prompt the economic development in rural areas.

Developing Agricultural Logistics Based on Agricultural Industrialization

Developing agricultural logistics is important to farm products circulation and it is helpful to solve the problems about agriculture, rural areas and peasantry of China. It is not a negligible countermeasure to increase peasants＇ incomes and enhance the capability of agriculture development in agricultural industrialization, meanwhile it can also raise the efficiency of farm products circulation. This paper firstly expounded that agricultural industrialization should include agricultural logistics, then analyzed the present problems of agricultural logistics and the significance of developing modem agricultural logistics which based on agricultural industrialization in China. Lastly, it put forward the countermeasures to develop agricultural logistics based on agricultural industrialization.