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用盆栽试验法研究了三元化成复合肥磷酸二氢钾铵对莴笋产量品质的影响。结果表明，适量供应复合肥时，莴笋植株吸收养分总量随供肥量的加大而增加。其中，Ｎ，Ｋ养分的增加尤为突出，最高增量达５６．５２％和４５．７９％，Ｐ的增加量较小，仅为１．９０％。供肥量过大，反而抑制养分的吸收。植株养分主要分布在茎叶中，其ＮＰＫ分别占总吸收量的９２．５７％～９５．８６％，８９．０３％～９３．６４％和９０．４７％～９５．５４％，并呈植株生长量越大，根系养分比率越低的现象。等量养分复合肥比单质ＮＰＫ肥的供肥能力、养分有效性及营养效应均具有优势。
Pot experiment was conducted to study the effect of ternary compound fertilizer on the yield and quality of lettuce. The results showed that the appropriate amount of supply of compound fertilizer, lettuce plant nutrient uptake increased with the increase of fertilizer supply. Among them, the increase of N and K nutrients was particularly prominent, with the highest increment reaching 56.52% and 45.79%, while the increasing amount of P was relatively small, only 1.90%. For excessive fat, but inhibit the absorption of nutrients. Plant nutrients were mainly distributed in the stems and leaves, the NPK accounted for 92.57% ~ 95.86%, 89.03% ~ 93.64% and 90.47% ~ 95.54% of the total absorption respectively, The greater the amount of growth, the lower the ratio of root nutrients. The same amount of nutrient compound fertilizer NPK fertilizer nutrient capacity, nutrient availability and nutritional effects have an advantage.