Variety of Chinese cabbage soil testing and fertilizer trials and preliminary determination of fertilization parameters

The formulation of 3414 part of the test program,using cabbage dwarf Heiye palm-leaf fan cultivars as materials,study on nitrogen,phosphorus,potassium fertilizer,yield mathematical model and the fertilization parameters were carried out in Lianshan County sandy loam.The results showed that: soil available nutrient contents of N high grade,high level,high level P K;according to the test results to calculate the Fertilization Parameters: the utilization rate of fertilizer nitrogen is 34.48%,P 21.40%,K 53.21%;soil nutrient correlation coefficients were 2.39(N),1.78(P),11.08(K).Two regression fitting fertilizer effect model: y=1882.16+7.49x1+19.95x2+46.13x315.54x1x2+2.622x1x3+1.574x2x3-0.151x12-53.35x22-315.67x32,the model is The highest yield 667m2 to 2068.17kg,N,P2O5,K2O application rate per 667 square meters respectively 6.5,1.2,4.9kg;fertilizer application ratio was 1:0.18:0.75.