| A rice-aquatic coculture system is an important lever for the development of green circular agriculture,which is of great significance for promoting the efficient utilization of paddy field resources,improving the quality and quantity of grain,and increasing the income of rice farmers.Planting and breeding circular agriculture needs to be integrated into the modern industrial system,taking the path of regional layout,large-scale operation,standardized production,and industrialized development of modern agriculture.This requires comprehensive planning and scientific guidance for the industrialization of rice-aquatic coculture system,and clarifying the spatial optimization sequence of industrialization development is a key task for overall planning of this industry.Based on this,this article is guided by theories such as agricultural resource zoning and modern industrial clusters,and attempts to design an indicator system to evaluate the spatial priority sequence of rice-aquatic coculture system industrialization development.Taking Jiangsu Province as the research area,this article explores the spatial strategy for the industrialization development of rice-aquatic coculture system in the province.The main research findings are as follows:(1)Starting from the adaptability of rice field cultivation and health preservation to resource background conditions,and taking into account the current situation of various natural factors,an indicator system for habitat suitability evaluation was constructed.Grid data such as hydrology,soil,and terrain were collected.Based on GIS analysis,the results showed that the resource base conditions for rice-aquatic coculture system in Jiangsu Province were good,and the area highly suitable for developing rice-aquatic coculture accounted for 13.8%of the total paddy field area in the province,Moderately suitable development area accounts for 57.0%;The high value areas of habitat suitability are mainly distributed in the Lixia River area and extend to the northern Jiangsu irrigation canal,as well as the eastern coastal plain to the south of the Yangtze River and the the Tai-Lake Plain.(2)The chance of successful agricultural industrialization development also depends on the dominance of the industry development.On the basis of comprehensive consideration of the current situation of labor,infrastructure and industrial soft environment,an index system for industrial dominance evaluation is constructed,and the entropy weight method is used for comprehensive scoring.The GIS based industrial dominance evaluation results show that the high dominance space of rice-aquatic coculture system in Jiangsu Province is mainly distributed in the Lixia River and the Hongze Lake area.The dominance in the northern part of the Huaihe River is highly differentiated,and the high value areas in the south are mainly distributed in suburban counties near Shanghai and Nanjing.(3)According to the results of spatial grading and evaluation of habitat suitability and industrial dominance,the spatial units of the county are divided into coupling zones.Based on the results of type zoning,four types of space classification and development guidance schemes are determined,including key development,moderate support,optimized adjustment,and controlled development,and then refined into 16 types of space development strategy matrix classification.In the three types of development spaces of key development,moderate support,and optimized adjustment,Xinghua City,Changshu City,and Xuyi County were selected for industrial research to provide empirical evidence for optimizing classified development space strategies and action plans.The results of this study have reference value for the formulation of policies related to the development of rice field resources and high-quality development of rice-aquatic coculture system in Jiangsu Province. |
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