The Effect Of The Different Application Of Phosphate On Form Of Inorganic Phosphate And The Biomass On Corn In Phaeozem

This article is main about Phosphorus validity in the black soil.Quoting Jiang Bo Fan Guyi the beginning of the grading system,the lime soil inorganic phosphorus composition is determined by pot experiment,the impact of available phosphorus,the calcareous soil composition of inorganic phosphorus,and each group of inorganic phosphorus Points also study the effectiveness of different phosphorus in the corn biomass impact. Main findings are as follows:The main soil inorganic phosphorus is O-P,secondary is the Fe-P and Ca₁₀-P,Al-P and Ca₂-P,Ca₈-P components in the least,after the application of phosphate fertilizer the soil inorganic phosphorus Content increased,inorganic phosphorus content of each component have changes after emergence 20 days,O-P, Ca₂-P,Al-P and Fe-P content increased,Ca₈-P content increased slightly,Ca₁₀-P is not changed virtually,that Ca₁₀-P effectiveness Low and can not be used by crop directly,but as a potential source of phosphorus.After emergence 40 days,the most components of phosphorus decreased but the O-P.After application of phosphate fertilizer,inorganic phosphorus the effectiveness of different components, their conversion rate is also different,20 days after the emergence,conversion rateof Ca₂-P was 8.3～63.35 percent,conversion rateof Ca₈-P was 13.1～28.7 percent,conversion rates of Fe-P,O-P,Ca₁₀-P and Al-P were 17.0～28.3%,2.3～26.2%,2.0～23.2%and 14.6～22.7%respectively.40 days after the emergence,conversion rateof Fe-P was 13.2～43.7percent,conversion rateof Ca₂-P was 11.1～36.9 percent,conversion rates of Al-P,Ca₁₀-P,Ca₈-P and O-P were 3.1～32.3 percent,8.6～25.9 percent,8.1～25.6 percent and 4.5～17.6 percent respectively.Conversion rates of various forms of inorganic phosphorus were related to amount of application of phosphate fertilizer.20 days after the emergence,conversion rate of Ca₂-P showed first increase after decreasing with increasing of amount of application of phosphate fertilizer.When P application was 10mg/kg,conversion rate of Ca₂-P reached to highest,was 29.1%. Conversion rate of Ca₈-P showed fluctuations in the trend,when P application was 5mg/kg,conversion rate of Ca₈-P reached to highest,was 28.7%;when P application was over 30mg/kg,conversion rate of Ca₈-P was stabilizing with increasing of amount of application of phosphate fertilizer.Conversion rate of Ca₁₀-P showed first increase after stabilizing,It reached to highest(25.9%)when P application was 40mg/kg.Conversion rate of Fe-P showed fluctuations in the trend,when P application was 10mg/kg,conversion rate of Fe-P reached to highest,was 28.3%.When P application was over 25mg/kg,conversion rate of Fe-P was decreasing with increasing of amount of application of phosphate fertilizer.when P application were 5 and 10mg/kg, conversion rate of Al-P was 17.9%,conversion rate of Al-P reached to highest,was 22.7%without application of phosphate fertilizer,When P application was over 15mg/kg,conversion rate of Al-P was stabilizing with increasing of amount of application of phosphate fertilizer.Conversion rate of O-P showed first fluctuations in the trend with increasing of amount of application of phosphate fertilizer.when P application was 70mg/kg,conversion rate of O-P reached to highest,was 13.9%.40 days after the emergence, Conversion rate of Ca₂-P showed first fluctuated.When P application was 10mg/kg,conversion rate of Ca₂-P reached to highest,was 36.9%.Conversion rate of Ca₈-P showed first fluctuated.When P application was 10mg/kg,conversion rate of Ca₈-P reached to highest,was 25.6%.Conversion rate of Ca₁₀-P showed first decrease after the increase.When P application was 40mg/kg,conversion rate of Ca₁₀-P reached to highest, was 25.9%.Conversion rate of Fe-P showed first decrease after the increase.When P application was 5mg/kg, conversion rate of Fe-P reached to highest,was 43.7%.Conversion rate of Al-P showed first decline after rising trend.When P application was 35mg/kg,conversion rate of Al-P reached to highest,was 16.2%. Conversion rate of O-P showed first decline after rising trend.When P application was 10 and 70mg/kg, conversion rate of O-P reached to highest,was 17.6%.After application of phosphate fertilizer,inorganic phosphorus and absorption of phosphorus by corn assuming significant positive correlation.After emergence 20 days,the Ca₂-P in soil and maize phosphorus uptake of the relevance of corn reach a significant levels in soil Ca₈-P and maize phosphorus uptake of the relevance of corn reach the significant levels,other forms of Inorganic phosphorus and maize phosphorus uptake of the relevance of corn did not meet the relevance of the significant level;After 40 days,Ca₂-P in the soil and Ca₈-P and maize absorption of phosphorus of the relevance of the significant level.Fe-P,Al-P and maize phosphorus uptake of relevance have significantly improved that over time the development,Fe-P,Al-P to increase the effectiveness.In the condition of lacking phosphorus,the growth of corn root is inhibited,corn root radius smaller, longer and root surface area are small than P normal for corn roots.After 20 days deal with low-phosphorus the ground biomass was significantly higher than group dealing with highow-phosphorus,comparing the roots biomass,in the condition of corn lacking phosphorus,application phosphate fertilizer,that can stimulate the root growth of corn,when the lack of phosphorus in the soil,the role of that is especially obvious.Application phosphate fertilizer can increased corn root,surface area of root and corn area of contace with the soil,that is conductive to corn absorb phosphorus.