Effects Of Nitrogen And Phosphorus Application Amount With Nutrient Absorption Efficiency Of High-yielding Maize In Central Jilin Province

The appropriate nitrogen fertilizer and phosphate fertilizer, and application time andproportion, on maize yield and nutrient utilization efficiency plays an important rolein.Therefore, this paper studied in central Jilin province carried out, the results show that:1. Effect of different nitrogen application rate on corn yield performance, the treatmentN3(N315kg/hm2) had the highest yield11440.5kg/hm2. The yield component factors of the sizeof the order of production: ha number> grain number per spike>1000-grain weight. The drymatter accumulation is proportional to the yield, treatment N3had the largest drymatteraccumulaton2218.3g/each plant, The total size of the dry matter accumulation process: N3>N2> N1> N0> CK.Suitable nitrogen fertilizer plants make nitrogen, phosphorus and potassium accumulationtended to increase the amount of absorption, N3treatment plants in the whole incubation periodof nitrogen, phosphorus and potassium are the highest cumulative amount of absorption. Thehighest yield treatment N3which N harvest index was67.9%, nitrogen utilization rate was26.5%, and nitrogen agronomic efficiency was7.2kg/kg. The phosphorus harvest index was36.6%,phosphorus utilization rate was37.6%, and phosphorus agronomic efficiency was22.7kg/kg.The potassium harvest index was23.4%, potassium utilization rate was59.4%, and potassiumagronomic efficiency was18.1kg/kg.2. Effect of different phosphorus application rate on corn yield performance, the treatmentT4(P2O5140kg/hm2) had the highest yield13899.5kg/hm2. The yield component factors of thesize of the order of production: grain number per spike>1000-grain weight> ha number. Basedon fitting a quadratic regression equation, the theoretical maximum yield of the test areaphosphorus content of154.7kg/hm2, the theoretical maximum yield of the test area14334.1kg/hm2. In the application of P fertilizer time and ratio test, yield of T11was thehighest,reached13917.8kg/hm2, The total quantity of phosphorus50%as base fertilizer, atjointing stage andtrumpet stage respectively topdressing total quantity of phosphorus25%canobtain higher yield of maize.Different P fertilizer application on maize dry matter accumulation performance, treatment T8had the largest dry matter accumulaton2021.2g/each plant, and the size order of dry matter accumulation of different P-fertilizer treatment was T8>T11>T10>T4>T5>T3>T9>T7>T6>T1>T0>T2>CK。Suitable phosphorus fertilizer plants make nitrogen, phosphorus and potassiumaccumulation tended to increase the amount of absorption, T4treatment plants in the whole incubation period of nitrogen, phosphorus and potassium are the highest cumulative amount ofabsorption. The treatment T4which N harvest index was74.8%, nitrogen utilization rate was48.6%, and nitrogen agronomic efficiency was10.7kg/kg. The phosphorus harvest index was45.6%, phosphorus utilization rate was24.9%, and phosphorus agronomic efficiency was22.9kg/kg. The potassium harvest index was29.5%, potassium utilization rate was48.5%, andpotassium agronomic efficiency was22.9kg/kg.3. Under the experimental conditions, the yield of corn in central Jilin fertilizer applicationmodes are: Nitrogen application amount was300kg/hm2-315kg/hm2, the total amount of N30%as base fertilizer, topdressing30%jointing, tasseling dressing40%; The amount ofphosphate fertilizer (P2O5) was80kg/hm2-140kg/hm2, the total quantity of phosphorus50%asbase fertilizer, in the shooting stage and trumpet stage respectively, the total quantity ofphosphorus fertilizer applied25%; Potash fertilizer (K2O)100kg/hm2-140kg/hm2was appliedas basal once for maximum yield.