| Sichuan Province is located in the hinterland of southwest China.The terrain is mainly mountainous and plateau.Its ecological conditions such as light,temperature,water,gas and heat are suitable for rice growth and development,and it has a long history of cultivation and rich experience in rice planting.Sichuan Province There is a large amount of rice planting area,but due to the large regional differences in climate and ecological environment,the rice industry layout and planting structure of each district and county need to be adjusted and optimized.GIS technology has the ability to organize,analyze,process and process spatial information in an instant,rapid,efficient and wide range,and replace planting surveys into an important technical method for rice planting evaluation.Based on the GIS technology,this study evaluates the suitable rice planting areas in 184 districts and counties of Sichuan Province under the guidance of agricultural cultivation techniques.Based on the reference to natural characteristics,land use types and socio-economic conditions,Sichuan Province The rice suitable planting areas are divided into:the most suitable planting area,the second suitable planting area,the basic suitable planting area and the unsuitable planting area.The degree of suitability of rice planting in each district and county was clarified,which provided a scientific basis for the overall planning and layout of the agricultural industry in Sichuan Province,optimizing the regional planting structure and sustainable development.The main conclusions are as follows:(1)In terms of natural characteristics,the most suitable planting areas for rice planting in Sichuan Province are concentrated in eastern Sichuan,including Zizhong County,Jiang’an County,Qingshen County,Yingshan County,Qixian County,Youxian District and Enyang District.Waiting for the place.Shiqu County,Zoige County,Lizhou District,Gulin County and Zhaojue County are the second suitable planting areas for the natural characteristics of rice in Sichuan Province.The basic suitable planting area for rice planting in Sichuan Province:mainly located in the plateau area in the northwest of Sichuan Province,the hilly area in the southwest and parts of the north of Sichuan.Including Jiuzhaigou County,Heishui County,Malcom City,Li County,Xichang County and Dechang County,as well as parts of Wanyuan City and Wangcang County.Unsuitable for rice growing areas Sichuan Province has only sporadic distribution in parts of Songpan County,Jiulong County and Suining County,mainly because its light,temperature,water,gas and heat cannot meet the basic conditions for rice growth and development,so it is not suitable.Rice cultivation.Under natural conditions,the optimal area for rice planting in Sichuan Province is 7.7357×10~4km~2,accounting for16%of the total area of Sichuan Province.The area of the second suitable rice planting area is1.08043×10~5km~2,accounting for 22.2%.The basic suitable planting area is rice in Sichuan Province.The area with the highest natural planting area,accounting for 13.2%of the total area,the area is 6.3933×10~4.km~2.It is not suitable for rice planting area,which is 48.6%of the total area of Sichuan Province and the area is 2.36666×10~5km~2.(2)Analysis of the suitable distribution of rice under the characteristics of land use characteristics and natural characteristics in Sichuan Province by GIS:Santai County,Jianyang City,Linshui County,Xuanhan County,Wusheng County,Jiajiang County,Sichuan Province,Shawan District and Renshou County are the most suitable rice growing areas,mainly distributed in the eastern part of Sichuan.The second suitable planting areas are mainly distributed in the northeastern part of Sichuan Province,including Nanjiang County,Wanyuan City,Kaijiang County,District County,Dazhu County and Pingshan County.The basic suitable planting areas include Tianquan County,Jiulong County,Suining County,Kangding County,Leibo County,Miyi County,Yuexi County,and Derong County.Jinchuan County,Yajiang County,Li County,Batang County,Baiyu County,Ganzi County,Dege County,Seda County,Aba County and Zoige County do not have paddy fields due to their geographical conditions and animal husbandry development.Carry out rice cultivation.Among them,the area of unsuitable planting area is the largest,accounting for 62.8%of the total area of Sichuan Province,with an area of 3.252×10~5km~2,and the area of basic suitable planting area is 1.24173×10~5km~2,which is second to the area of unsuitable planting area,accounting for 25.55%.The area is 4.1067×10~4km~2,accounting for 8.45%of the total area of Sichuan Province,and the minimum suitable area for planting is 1.556×10~4km~2,accounting for 3.2%. |
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