Research On Circulation Agriculture Model Based On Comprehensive Utilization Of Straw In Anhui Province

Crop straw is an important agricultural by-product and biological resource,which has a wide range of uses.Anhui is an important agricultural province in China,with abundant straw resources,but the resource waste and environmental risks caused by the accumulation of large amounts of straw are increasingly serious.Therefore,it is urgent to explore a suitable comprehensive utilization mode of straw.However,current researches on agricultural models of straw resource recycling in Anhui Province are still scarce.The article aims to study the amount and spatial distribution of straw resources,the current status of straw comprehensive utilization industry,and the construction,implementation and guarantee measures of straw recycling agricultural development model in Anhui Province,with literature collection,field research,case analysis and other methods were used.Hoping to provide data support for straw comprehensive utilization enterprises,and to provide model support forrecycling agricultural development models based on straw comprehensive utilization in Anhui Province.Achieving sustainable development of agriculture and dual protection of resources and environment,and contribute to the comprehensive utilization of straw in Anhui Province.This research found that theoretical reserves and collectable amounts of crop straws in Anhui Province are as high as 60 million tons and 48 million tons per year,respectively,mainly wheat and rice and corn,accounting for over 85% of the total.However,there are obvious spatial differences in straw resources.The total amount of straw resources in northern Anhui is the highest,and the amount of wheat and corn straw resources in this area is significantly higher than that in the middle and southern Anhui.But the rice straw resources are the highest in middle area of Anhui.The uneven distribution of straw types and resources imposes higher requirements on the exploration of straw comprehensive utilization modes in Anhui.Therefore,different regions in Anhui Province should adapt to local conditions and explore suitable straw comprehensive utilization models.According to its own geographical and industrial characteristics,North Anhui can develop a multi-level recycling model,which combines planting,breeding and energy production.Such as straw-biogas recycling model,and agricultural-animal husbandry combined ecological recycling model.Relying on the technological and economic advantages of universities and enterprises,the central Anhui can carry out technological research and development,and develop a recycling model that combines agro-industries based on leading enterprises.Due to the relative small amount of straw in southern Anhui,a kind of small-scale and simple operation straw utilization model is suitable for here.In recent years,the comprehensive utilization rate of straw in Anhui Province increasing continuously,which has exceeded 80%,but there is a problem of a single utilization method.Fertilization is the most important way of utilization,accounting for 60-80% of the comprehensive utilization,but the utilization rate of feed,energy,raw materials and base materials is relatively insufficient.Problems such as imperfection system of straw machinery returning,weak driving force of the enterprise,and relatively weak key technology are the main factors that restrict the development of comprehensive utilization of straw in Anhui Province.In view of the above problems,the study put forward targeted opinions such as further improving the policy guarantee system,strengthening technological R & D innovation,and giving play to the role of pilot demonstration and such on.