氮钾肥配施对番茄幼苗生长及前期产量构成的影响

以尿素和硫酸钾为主要氮、钾肥料,以草炭和蛭石为育苗基质进行番茄育苗试验,研究分析了育苗基质中不同氮、钾肥料配施方案对番茄幼苗生长及其前期产量构成的影响,结果表明:番茄育苗过程中氮、钾肥料不同配比对番茄幼苗生长及前期产量存在显著影响,偏施氮肥或钾肥均可降低番茄出苗率、抑制番茄幼苗生长与干物质积累,氮、钾肥料合理配施可明显提高番茄幼苗素质,增加番茄前期开花数与座果数从而增加番茄前期产量,番茄基质育苗过程中氮、钾(N∶K2O)肥料最佳配比为1∶1.2。

Effects of Nitrogen-potassium Fertilizer Formula on the Growth and Early Productivity of Tomato Seedlings

The effects of different nitrogen-potassium fertilizer formulas applied in nursery media on the growth and early productivity of tomato seedlings were studied. The nursery media were consisted of peat moss,vermiculite and chicken manure, and the urea and potassium sulfate were used as the main N-P fertilizer source. The results showed that the nitrogen-potassium fertilizer formulas had significant effects on tomato seedlings. Excessive nitrogen or potassium fertilizer inhibited the seed emergence and decrease dry weight of seedlings, and proper fertilizer formula enhanced the seedling quality and early productivity. To raise health and vigorous tomato seedlings, the optimum ratio of nitrogen to potassium fertilizer in nursery media should be 11.2.