Research On Fertilization Techniques Of Winter Wheat-summer Maize Rotation Based On Abundance&Deficiency Indices Of Soil Nutrients In Zhangqiu City

This study analysied and evaluated the soil nutrient status with ArcGIS in the research region of Zhangqiu City,Shandong Province,based on the results of N,P,K"3414" experiments,soil fertility and different soil nutrients content were established and the law of fertilization suitable for winter wheat and summer maize rotation in this region was explored finally.(1)The soil nutrient status of cultivated land in Zhangqiu CityAccording to the standard of nutrient level,organic matter,available phosphorus,available potassium are secondary level,total nitrogen is three;The secondary nutrients is rich,such as Ca and Mg,trace element iron,copper,boron,manganese is relatively abundant,Zn is relatively low.In general,soil organic matter,total nitrogen,available potassium and available phosphorus in the plow layer of Zhangqiu were moderate with the lack of Zn.In the future,we should increase the application of organic manure,control a large number of elemental fertilizer,as appropriate,the application of trace element fertilizer.(2)Comprehensive Analysis of Cultivated Land in Zhangqiu CityUsing ArcGIS and county arable land resource management information system software with relying on geostatistics and other related theories,we analyse the current situation of cultivated land's fertility,and statistics of all grades of cultivated land area,distribution and main attributes,then put forward the rational use of recommendations.The total area of arable land in Zhangqiu City is 76070 hectares,the primery land is 14447.Ohectares,accounting for 19.0%of the total cultivated land area,the secondary land is 19419.4 hectares,accounting for 25.5%of the total area of cultivated land,the third land is 18009.2 hectares,accounting for 23.7%of the total area of cultivated land,the forth land is 16426.1 hectares of land,accounting for 21.6%of the total arable land area of cultivated land,the fifth land is 7197.1 hectares,accounting for 9.5%of the total arable land area of cultivated land,the sixth land is 571.2 hectares,accounting for 0.8%of the total area of arable land.(3)Fertilization Recommendation of Winter Wheat-Summer Maize Rotation in Zhangqiu CityWhen the yield of wheat is 5250kg/hm2 in winter wheat-summer maize rotation system in Zhangqiu City,the recommended nitrogen rate is 182 kg/hm2,the ratio of basal and topdressing is 6:4,the recommended phosphorus rate is 90 kg/hm2 if the available phosphorus content is 6?16mg/kg,the recommended potassium content is 45 kg/hm2 if the rapidly available potassium content is less than 68mg/kg.When the target wheat yield is 6750kg/hm2,the recommended nitrogen rate is 210kg/hm2,the ratio of basal and topdressing is 5:5,the available phosphorus content in the soil is 6?16mg/kg,the recommended amount of phosphorus is 135kg/hm2.the recommended amount of phosphorus is 90kg/hm2 if the soil available phosphorus content is 16?29mg/kg,the recommended potassium application rate is 45kg/hm2 if the soil rapidly available potassium content is 68-114mg/kg,the recommended potassium application rate is 22.5kg/hm2 if the rapidly available potassium content is more than 114mg/kg,When the target wheat yield is 7500kg/hm2,the recommended amount of nitrogen is 236kg/hm2,the ratio of basal and topdressing is 4:6,the available phosphorus content is 16-2-9mg/kg,the rec.ommended-amount of phosphorus is 105kg/hm2,the recommended amount of potassium is 30kg/hm2 if the rapidly available potassium content is more than 114mg/hm2.When the yield of target maize is 6000kg/hm2,and the recommended nitrogen rate is 183kg/hm2,the recommended amount of phosphorus is 60kg/hm2 if the available phosphorus content is 6?16mg/kg,the recommended amount of phosphorus is 90 kg/hm2 if the soil rapidly available potassium is less than 68mg/kg,When the yield of target maize is 7500kg/hm2,the recommended amount of nitrogen is 19Tkg/hm2,the recommended amount of phosphorus is 75 kg/hm2 if the content of available phosphorus in soil is 6-16mg/kg,the recommended amount of phosphorus is 45 kg/hm2 if the content of available phosphorus in soil is 16?29mg/kg,the recommended amount of potassium is 90 kg/hm2 if the content of rapidly available potassium in the soil is 68?114mg/kg,the recommended amout of potassium is 45 kg/hm2 if the content of rapidly available potassium in the soil is more than 114mg/kg.When the target yield of maize was 9000 kg/hm2,aud the recomended nitrogen rate is 211 kg/hm2,the recommended amount of phosphorus is 52.5kg/hm2 if the available phosphorus content is 16?29mg/kg,the recommended amount of phosphorus is 52.5 kg/hm2 if the soil rapidly available potassium is less than 114mg/kg.