Development Of Cultivated Forage Suitability Zoning And Expert System Based On ArcGIS In Shaanxi Province

The climate types in Shaanxi Province are complex and diverse,including the mid-temperate zone along the Great Wall in northern Shaanxi,the warm temperate zone in most areas of Guanzhong and northern Shaanxi,and the northern subtropical zone in southern Shaanxi.The complex climate types make the grasses suitable for growth in various places also rich and diverse."Where? What can be planted? How should it be planted?" are the three main questions to be answered in this study.This paper is based on GIS,spatial analysis,fuzzy mathematics and analytic hierarchy process,and linear weighted summation method,combined with the topographic data of Shaanxi Province,main meteorological data and soil properties indicators,etc.,to calculate the annual average precipitation,annual average temperature,soil p H,Topography,landform,slope,and other five main indicators that affect the growth of forages,for the first time,the cultivated forages in Shaanxi Province were systematically sorted out,and a model for the suitability of cultivated forages with comprehensive module functions and strong adaptability was constructed.System construction and system simulation effect verification,after many iterations of simulation,developed an intelligent expert system with man-machine dialogue function and dynamic maintenance function.In accordance with the database design principles and standards,the forage spatial data and attribute data are combined to carry out suitability zoning of 64 cultivated forage grasses in Shaanxi Province,which provides a scientific basis for the development and ecological management of artificial grasslands in Shaanxi Province.Taking four kinds of cultivated pastures,namely alfalfa,sainfoin,perennial ryegrass,and crested wheatgrass,as examples,the model verification,system operation and analysis were carried out.The results showed that:(1)Alfalfa has a wide range of adaptability in Shaanxi Province,most areas are in suitable and sub-suitable areas,and only a small part of the southernmost area is not suitable for planting.(2)The adaptability polarization of common sainfoin in Shaanxi Province is relatively serious,and the suitable and unsuitable distribution areas are concentrated and the contrast is obvious.Suitable areas are mainly distributed in the northern Shaanxi Plateau and the northern part of the adjacent Guanzhong Plain.The unsuitable area is located in most of the southern end of southern Shaanxi.(3)Perennial ryegrass has a weak viability in the northern part of Shaanxi Province and is not suitable for planting.The suitable and sub-suitable areas are mainly located in the Guanzhong Plain and southern Shaanxi in southern Shaanxi Province.(4)Crested wheatgrass has poor adaptability in the whole province of Shaanxi Province.The suitable areas are mainly in the windy sand zone along the northernmost part of the Great Wall of the Northern Shaanxi Plateau,and the rest are sub-suitable and unsuitable for planting.