小白菜测土配方施肥试验和施肥参数确定初探

采用测土配方"3414"试验方案,以小白菜矮脚黑叶葵扇品种为材料,在连山县沙质壤土上进行了氮、磷、钾肥料效应、产量数学模型及施肥参数确定的研究。结果表明:供试土壤中有效养分含量丰缺程度为N高等级、P极高等级、K极高等级;根据试验结果计算出施肥参数为:肥料利用率氮肥为34.48%、磷肥为21.40%、钾肥为53.21%;土壤养分校正系数分别为氮2.39、磷1.78、钾11.08。用二次回归分析拟合肥料效应模型为:y=1882.16+7.49x1+19.95x2+46.13x3-15.54x1x2+2.622x1x3+1.574x2x3-0.151x12-53.35x22-315.67x32,该模型每667 m2最高产量为2 068.17 kg时,N、P2O5、K2O每667m2施用量分别为6.5、1.2、4.9 kg,肥料施用比例为1∶0.18∶0.75。

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+46.13x3-15.54x1x2+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.