番茄的不同生育时期养分的吸收量不同,氮、磷、钾、钙、镁五种元素的吸收量,随着生育期的延长而增加。尤其是氮、钾、钙在第一花序开始结实时,吸收量迅速增加,在生育前期,番茄植物对氮和磷的吸收总量虽然不及后期,但是由于前期根系吸收能力的限制,对肥力水平要求却很高,若缺乏氮和磷不仅抑制前期生长和发育,而且这种抑制作用在后期补施磷和氮也不可能挽回。在生育中期,氮、磷、钾 The nutrient uptake of tomatoes at different growth stages was different, and the uptake of nitrogen, phosphorus, potassium, calcium and magnesium increased with the growing period. In particular, the nitrogen, potassium and calcium absorption increased rapidly when the first inflorescence began to grow. In the early growth period, although the total nitrogen and phosphorus uptake by tomato plants was less than the latter, due to the limitation of early root absorption capacity, The demand is very high, if the lack of nitrogen and phosphorus not only inhibit pre-growth and development, and this inhibitory effect in the late supplement of phosphorus and nitrogen can not be restored. In the middle stage of fertility, nitrogen, phosphorus and potassium