The Influence Of Large-scale Management On Rice Planting System And Its Economic Benefit Evaluation

After nearly 40 years of reform and opening up,China's urbanization rate jumped from 17.9% in 1978 to 58.52% in 2017.While urbanization has achieved tremendous achievements,along with the advancement of urbanization,due to the decline in the comparative income of agriculture,there has emerged a further increase in the transfer of rural laborers into urban areas,resulting in the land use issues of cultivated land,farmland conversion,and hollowing out.The uneven development of urban and rural areas has become an important factor that affects the stability of the country.At the same time,the transfer of rural labor force has made the small-agricultural business model under the family-joint contracting system facing a huge adjustment and transformation.At present,it is through the transfer of land to expand the scale of land management and promote the use of agricultural machinery to increase labor productivity,which has become a common phenomenon in China's current agricultural development.But will the increase in agricultural labor productivity lead to the growth of agricultural economic benefits? What is the relationship between agricultural scale and economic efficiency? Under the drive of economic interests,is there correlation between the cultivated land cultivation and the scale of operations? For a long time,no consistent conclusions have been reached on the above issues,and there has been considerable controversy on the interpretation of the research results.Jiangxi Province is a traditional agricultural province in China.In the process of rapid urbanization,the mode of agricultural scale management with land circulation as the main means is booming.This article selects Anyi County,a municipal county in Nanchang,the capital city of Jiangxi Province,as the research area.It is located in Nanchang City,the most economically developed capital city in Jiangxi Province,and is also the pilot area for the pilot reform of land transfer regulations in Jiangxi Province.The county's land circulation rate has reached 51%,and the scale of agricultural operations is widespread.This paper takes Anyi County as an example,through multiple stages of Landsat series image data,using the normalized vegetation index,according to the rice phenology curve to select the appropriate time window,using the threshold method to extract the single and double rice planting area in different years in Anyi County.The characteristics of spatio-temporal evolution of multi-time series rice ripening were discussed;the spatio-temporal differences in the distribution of large-scale growers were analyzed;and the relationship between the double-season rice area of large-scale planting and the double-crop rice planting area in each administrative village was investigated in administrative villages.For growers of different planting scales,economic benefits are evaluated based on their input and output.Research indicates:1)The planting area of rice in Anyi County from 2001 to 2017 showed a slowly growing trend;from the perspective of the planting area of single and double cropping rice,the planting area of single cropping rice showed a decreasing trend,and the planting area of double cropping rice showed an increasing trend;2)In 2011-2017,the county-scale planting households had large differences in annual total change,the number of small-and medium-scale growers varied greatly,the scale of large-scale and ultra-large-scale changes was small,and the number of moderate-scale growers continued to increase;the spatial distribution of large households was significantly different.Small-scale growers dominated,medium-scale changes followed,and large-scale,large-scale,and ultra-large-scale changes were modest.3)The large-scale growers are distributed in flat lands and gentle slope farms with an elevation of less than 30 m and slopes of less than 15°.These areas are flat and suitable for large-scale agricultural production.4)There is a positive correlation between the planting area of double-season rice of large-scale planting and the double-season rice planting area of administrative villages,and the spatial distribution is aggregative.However,the spatial relationship between planting scale and rice cooking system is not strong;the impact of farmer area on the planting pattern of double-season rice Not obvious;5)The calculation of the economic benefits of different scales of operation using the DEA model shows that 480 mu is the scale of operation that produces the best economic benefits in Anyi County.The above findings can provide scientific basis and reference for Jiangxi Province to formulate farmland protection and agricultural development policies.