A Three-Dimensional Model for Special Ecological Agricultural System (SEAS) in the Southeast Fujian Province

Although the southeast Fujian Province has favorable bio-climatic conditions, traditional farming models are limited in effective exploitation of agriculture related resources and have deteriorated the agricultural environment. After analyzing the conditions at Maping town, we designed a three-dimensional model, special ecological agricultural system (SEAS), at Maping town. The SEAS has been practiced for three years and results show that the SEAS more efficiently utilizes local time and space resources and gains more econo- mic, ecological and social benefits. Thus, the SEAS has been considered as an optimal model for sustainable utilization of agricultural resources.

Spatial Distribution Characteristics and Influencing Factors of Agricultural Specialized Villages in Guangdong Province,China

China is vigorously implementing a rural revitalization strategy with the prosperity of rural industries as the primary goal.The characteristic economy of’One Village One Product’(OVOP)is particularly significant in promoting rural revitalization and increasing farmers’income.Accurately identifying the spatial distribution characteristics and influencing factors of agricultural specialized villages(ASVs)under OVOP provides a preliminary research basis for constructing the theoretical framework of specialization and clustering of rural industrial development.This study takes Guangdong Province,China as an example,using kernel density estimation,Ripley’s K function,geometric fractals,principal component regression and other methods to identify the spatial distribution characteristics and influencing factors of ASVs.It was found that the ASVs in Guangdong Province are dominated by the planting industry,with an uneven number in space and a multi patch distribution.Specifically,ASVs are mainly distributed in the Chaoshan Plain in the eastern Guangdong,the northern mountainous area of Guangzhou,and the eastern part of Maoming City.Its spatial distribution mode obeys the aggregation distribution pattern at the scale of province,region and municipality(prefecture-level city).In addition,the formation and development of ASVs are affected by multiple internal and external factors.The influence of basic factors such as natural environmental conditions is gradually weakening,while the influence of social and economic factors such as market demand is gradually increasing.This study can enrich the research results of ASVs and provide guidance and reference for the long-term and high-quality development of rural industry revitalization.

Impact of cultivated land fragmentation on spatial heterogeneity of agricultural agglomeration in China

Systematically revealing the impact of cultivated land fragmentation(CLF)on the geographical agglomeration pattern of agricultural specialization(AS)has positive significance for national agricultural production management.Based on the data of the second national land survey and agricultural production,this study has explored the impact of CLF on spatial heterogeneity of agricultural agglomeration in China by comprehensively using the Theil index,ordinary least square model and geographically weighted regression.Results showed that:(1)the regional differentiation of the CLF in China is obvious,and the cultivated land fragmentation index is generally characterized by increasing pattern from northwest to southeast.(2)Spatially,the development level of AS in China has formed three high-value clusters in the Northeast China Plain,the Qinghai-Tibet Plateau,and the middle of the Middle-lower Yangtze Plain;and the low-value contiguous areas centered on the Yunnan-Guizhou Plateau and the Sichuan Basin and surrounding regions,with significant spatial differences.The contribution of grain crops,economic crops,and vegetables and melon to the level of AS was 74.63%,9.09%,and 16.28%,respectively,and the pattern of agricultural geographical aggregation dominated by grain crops has primarily taken in shape.(3)CLF is significantly negatively correlated with AS,and every 1%increase in the degree of CLF will result in a decrease of about 0.2%in AS.However,the impact of CLF on the geographic agglomeration of different crop categories or groups varies significantly.Among them,CLF has a prominent impact on the specialization level of grain crops and vegetables and melon.Each 1%increase in the CLF will reduce the specialization level of grain crops by 0.38%,and increase the level of vegetables and melon by about 0.22%.(4)According to the landscape characteristics of cultivated land,the degree of spatial division and agglomeration of cultivated land patches have a significant impact on the formation of geographical agglomerationpattern of AS,and the intensity and direction of influence show significant regional differentiation,while the patch size has no significant impact.