The Evaluation Of Land Productivity In Jilin Base On GIS

Jilin province is a large grain base for food production in China, productivity ofcultivated land is concern as symbol of productivity of angricultre land,concerned by socialand government for the important role its plays. Based on the sample data and other relatedmaps get from2009to2011, cultivate land productivity evaluationed ande anlysede by GISplatform. And then put the result into national stander, the same time the horizontal andvertical comparison to the survey of land in1980, and Reasonable countermeasures isconducted.Results of organic matter content showed that the overall tred is high in the east andlow in west, The main level is five and six in east of Jilin, without most part of yanbian. Themai level of land productivity is two and three in the middle of Jilin, The organic of west islower than other place, zhenlei, qianguo, tongyu and qianan mainly contained with level offive and six.Nitrogen content shows the symbol of U, The middle of Jilin is lowet. The mainly levelis three, besides shulan, in the north of Jilin. The level of six is conclude with gongzhulin,nongan and dehui, yushu is in seconed level, zhenlei and qianan is the first level.taonan, daanand qianguo is mainly with four and five.The distribution characteristics of available phosphor is much same to organic matter,high in east and low in west.tonghua, jian and hunjiang is in the first level, which is in the eastof Jilin.dunhua, antu, lingjiang and most part of fusong is in the level of first and seconed. Thefirst level in the east of Jilin is yitong, dongfeng, meihekou and huinan. The rest of east is inseconed level. Lishu is in the first level, jiutai, shuangyang and fu yu is in the seconed anthree, which is in the middle of Jilin. Songyuan is in the three level, rest of areas in the west ismainly in four an five level.The distribution of Olsen-k is mainly in the north of Jilin, different from orgnic andnitrogen. Longjing is in the first level, which is located in the southeast of Jilin.the north andsoutheast of longjing, northeast and east of jiaohe, west of wangqing is in the seconedlevel.The main level in the middle is three and four, the most part of qianguo and taonan is inlevel of two and three, rest of west is all in level three.The land tatoll nutrient is showing a rise trend to the seconed survey in1980, theorganic matter changed more to others, from22.7g/kg to25.1g/kg, the nitrogen reduced, thepercentage is2.4. Soil available phosphor is rise from11.2mg/kg to19.2mg/kg. the Olsen-Kis riese from103mg/kg to144mg/kg...