Study On The Land Quality Evaluation And Food Security In The Agriculture And Pasturage Interlaced Zone

For a long time, the food supply of the Agriculture and Pasturage InterlacedZone of Northern Shaanxi is not enough. The interrelation between the people andland is very intensity. And the inconsistency of the food sustentation has been animportant obstacle on the development of region economics. In the situation there isan important significance through the studying of the quality and amounts of land inthe region and the capacity of food supplying to master the status of the food supplyand demand. In addition, the studying of the quantity and quality of land and finding away to resolving the inconsistency between supply and demand of food is also veryimportant in order to keep the balance of food supply and demand. My article drawsome conclusions based on the evaluation of land in the Agriculture and PasturageInterlaced Zone of Northern Shannxi and on the systemic studying of food security ofthis area. 1. Based on the software — ArcGIS, build the spatial basic database andthrough the spatial union of special graphic map we get the map plot as basic unit ofthe land quality evaluation. At the same time we can gain the attribute information ofthe basic unit by the means of attribute table manipulation. After this, combined withthe social economy attribute information, built the attribute database. Based on thespatial database, we can make use of the method of union to output the result of landevaluation. 2. Gain the result of land evaluation by use of APH method. And the resultshows that the land quality of the area is not high as a whole. The first and secondgrade land is very few, only 2.38 hm2,0.66 percent of total; The third grade land has41.43hm2, 11.47 percent; The forth grade land has 109.97 hm2, 30.45 percent; Thefifth grade land has 92.54hm2, 25.65 percent; The sixth grade land has 81.05hm2,22.44 percent; The seventh grade land has 33.72hm2, 9.34 percent. 3. Reveal the inconsistency of food supply and demand in the area, ?forecastthe food demand. Based on correlation information, use the method of mathematicsStat. and set down the future goal of nourishment development. We can get thedemand in 2005, 2015 and 2030 year. They are 686640 thousand kg, 1028080 thousandkg and 147100 thousand kg. (2) forecast the food supply. The food includes the vegetation food andlivestockproduct.Wemustconvertthe livestockproductintothevegetationaccordingtothestandardofnourishment. Finally we can forest the result of food supply in 2005, 2015 and 2030year. They are 559340 thousand kg, 704420 thousand kg and 828260 thousand kg.?the inconsistency of the food supply and demand. Based the forest of supplydemand and supply, we can see that there are deficiencies between the demand andsupply in the future. They are -127300 thousand kg, -323660 thousand kg and-642740 thousand kg in 2005, 2015 and 2030 year. 4. Increase the output of food to resolve the food security problem. The measuresare these: To protect the amount of plantation, prohibit impropriating plantation. Toexploit the other resources, increase the amount of plantation. To improve the qualityof plantation, increase the output of land. To adjust the structure of farming andpasturage, develop the pasturage adequately.