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以小白菜为材料,研究了不同施肥处理对小白菜产量、硝酸盐含量、硝酸盐还原酶活性及VC含量的影响。试验结果表明,在土壤1中优化配方施肥在氮、磷用量分别比常规施肥减少42%、61.47%,钾增加29.07%的情况下(N 4.35 kg/667 m~2、P_2O_52.89 kg/667m~2、K_2O 9.68 kg/667 m~2),产量增加20.04%,VC含量增加32.52%,硝酸盐含量降低31.56%;土壤2中优化配方施肥在施用氮、磷分别比常规施肥减少100%、100%,钾增加3.8%的情况下(N 0 kg/667 m~2、P_2O_5 0 kg/667 m~2、K_2O 7.79 kg/667 m~2),产量增加49.19%,VC含量增加101.63%,硝酸盐含量降低51.37%。土壤1和土壤2结果比较发现,在不同肥力土壤中,优化配方施肥处理的小白菜都取得了较高的产量、较好的品质,但在不同肥力土壤中最优施肥量不一样,具体施肥量需要根据土壤肥力和作物种类考虑。
Using Chinese cabbage as material, the effects of different fertilization treatments on the yield, nitrate content, nitrate reductase activity and VC content of Chinese cabbage were studied. The results showed that the optimal formula fertilization in soil 1 was 42.5% (N 4.35 kg / 667 m -2, P 2 O 52.89 kg / 667m) when the amount of nitrogen and phosphorus decreased by 42%, 61.47% and 29.07% respectively compared with the conventional fertilization ~ 2, K_2O 9.68 kg / 667 m ~ 2), the yield increased by 20.04%, VC content increased by 32.52% and nitrate content decreased by 31.56%. The optimal formula fertilization in soil 2 decreased by 100% 100% and 3.8% potassium (N 0 kg / 667 m 2, P 2 O 50 kg / 667 m 2, K 2 O 7.79 kg / 667 m 2), the yield increased 49.19% and the VC content increased 101.63% Nitrate decreased by 51.37%. The results of soil 1 and soil 2 showed that in different fertile soils, the optimum formula fertilization cabbage has achieved higher yield and better quality, but the optimal fertilization rate is different in different fertile soils, and the specific fertilization The amount needs to be based on soil fertility and the type of crop to consider.