题目内容

不同蔬菜种类对养分吸收利用能力有差异,叶菜类蔬菜以 肥为主;果菜类蔬菜,一般幼苗需多施 ,进入生殖生长期后,增施肥,控制肥的用量;萝卜、胡萝卜等根菜类蔬菜,其生长前期主要施氮 肥,到肉质根生长期则要多施肥,适当控制肥用量,以便形成肥大的肉质直根。

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