| Anhui province is a large national wheat planting province,wheat yield in wheat production is in the top ten,relatively good quality too.However,in recent years,along with the agricultural land area decreased,the output of crops and industrial crops have a certain degree of reduced.Coverage at the same time,along with the economic globalization gradually spread to all fields,the strength of the agricultural sector is one of the forms of each country evaluation overall competitiveness.But,our country is a developing country,both comprehensive national strength and development level is lower than the developed countries.In the field of agriculture,agricultural mechanization level is high in the developed countries,advanced scientific management experience,and most of our country is lagging behind in the process of the low level.Ranking the world’s first population of our country,population pressure,tension and environmental pollution in today’s land under the double pressure of how to obtain high yield and good quality of crops is each agricultural technical personnel must solve the problem.Our province is located in the central region of China,under the influence of humid temperate sub-humid monsoon climate,high temperature and rainy summer,winter cold and dry.In our province,the temperature in the south of huangshan mountain the climate influence obviously,hydrothermal conditions in jianghuai region is affected by huaihe river in qinling-significantly,while the dabie mountain area in the west of the province,was affected by the west anhui region.Because in the north of our province is more plain and low mountain hills,so the monsoon climate is significant.Different areas,their temperature,sunshine hours and rainfall are different,these differences determine the yield and quality of wheat,studying climate change law can bring certain basis and reference for wheat fertilization.So this article from the perspective of climate elements of zoning of wheat fertilization,then according to the different areas of the index system of phosphorus potassium fertilization formula for each area in the GIS software.The following are the concludes:1.In this paper will eventually fertilization partition is divided into: jianghuai west anhui huaibei area,two big areas,will result in fertilization partition after formula after verification,determine whether the formula for wheat production has brought a certain income.Taking SuiXi County check base and dingyuan as synergist for local exploration and investigation after each region of the formula is determined,in accordance with the formula fertilization after wheat yields are somewhat ’income than before.2.Using the GIS spatial interpolation function,the climate and soil nutrient content of interpolation,the interpolation after comparing with the results of the findings:rainfall,sunshine time and temperature in climate will have on content of nitrogen,phosphorus and potassium in the soil.3.The nitrogen to total amount control and installment adjustment method.Under the relative output level of each region is divided into: high,medium and low three grades,corresponding: less than 75%,75% to 90%,more than 75% three criteria.Huaibei region after a mathematical calculation of effective phosphorus content is less than 13 mg/kg,13 to 28 mg/kg,more than 28 mg/kg.Jianghuai effective phosphorus content of west anhui area are: less than 15 mg/kg,15 to 25 mg/kg,more than 25 mg/kg.Rapidly-availablepotassium content in the huaibei area is divided into three levels corresponding to high soil available potassium content is: less than 80 mg/kg,80-180 mg/kg,more than 180 mg/kg.Jianghuai rapidly-available potassium content of west anhui areas are: less than 70 mg/kg,70-150 mg/kg,more than 150 mg/kg.4.In the software of GIS spatial data,it is concluded that the 14 wheat area in anhui province big formula,the formula is: 18-12-15,18-12-15,25-13-7,26-10-9,22-8-15,26-10-9,25-9-11,27-8-10,27-8-10,25-9-11,28-9-8,29-10-9,29-10-9,28-9-8. |
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