Effects Of Fertilization Formula On Wheat Yield,Quality And Fertilizer Absorption And Utilization Under Different Soil Fertility In Huainan Region

The experiment was carried out at Juegan and Matang town of Rudong county in wheat region along Yangtze River in Jiangsu province during 2005-2007. With Yangmai 11(medium gluten wheat)and Yangmai 15(weak gluten wheat)as materials,effects of formula fertilization on wheat yield and its formation, dry matter accumulation, fertilizer absorption and quality under different clip sandy soil fertility were studied.The main results showed as follows.1,It was a quadratic regression equation between yield and fertilization level at high fertility soil(H-F-S,the same as follows),middle fertility soil(M-F-S,the same as follows) and with the application of N at low fertility soil(L-F-S,the same as follows)of two varieties. With the application of P,K at L-F-S increasing,the yield of two varieties enhanced in linear relation. According to the comprehensive analysis based on the effect equation of fertilizer appling showed that the suitable fertilization fomula that avail to got high-yield of two varieties were: N 13kg/666.7m2,P2O5 4kg/666.7m2, K2O 6kg/666.7m2 at H-F-S;N16.25kg/666.7m2, P2O5kg/666.7m2,K2O 6kg/666.7 m2 at M-F-S;N19.5kg/666.7m2, P2O5 6kg/666.7m2, K2O 9kg/666.7m2 at at L-F-S. The allocated proportion of NPK respectively were 1:0.31:0.46,1:0.25:0.37,1:0.31:0.46.2,It was a quadratic regression equation between biomass yield and N,P,K application at H-F-S,M-F-S, the most suitable spot from the equation was fit in with the most suitable spot which extracts with the fore-mentioned grain yield relations.while the N application also had a quadratic regression equation with the biomass yield at L-F-S of two varieties. the application of P,K had a linear relation with the biomass yield. The result certificated that the optional fertilization application and allocated proportion according to the effect equation of fertilizer appling had the foundation of dry matter production of the wheat population.3,It was a quadratic regression equation between the fertilizer absorption and utilization and N,P,K application at H-F-S,M-F-S, and with the application of N at L-F-S of two varieties. the application of P,K at L-F-S, the fertilizer absorption and utilization of two varieties were increased in linear relation with the increasing of fertilization application.The result was the same as the trends according to the yield and biomass yield.4,The sequence of the grain test weight,protein content,the wet gluten content and sedimentation volume which effected by different soilfertility and formula fertilization was that sedimentation volumeï¹¥the wet gluten contentï¹¥protein contentï¹¥the grain test weight. With the soil fertility descending, the four index of two varieties become low. the protein content,the wet gluten content and sedimentation volume was first increasing then decreasing with the increasing of the NPK application at H-F-S,M-F-S, and with the increasing of the N application at L-F-S. With the application of P,K at L-F-S increasing, the protein content,the wet gluten content and sedimentation volume of two varieties enhance.The sequence of starch content and its composition effected by different soil fertility was that amylase contentï¹¥starch contentï¹¥amylopectin contentï¹¥ratio of amylose content to amylopectin content. The starch content and its composition effected by fertilization were showed that the starch content and its composition first increased and then decreased with the increasing of the NPK application at H-F-S,M-F-S and the N application at L-F-S,while the starch content and its composition decreased With the increasing of the P,K application.