Nutri？？o mineral das hortali？as: LXXXVIII. Extra？？o de nutrientes em alho-porró (Allium porrum)

an experient was carried out in order to determine the nutrients extraction by leek, in field condition. plant materials were collected, since 50 days after transplanting, in intervals of 20 days up to 170 days growth. the results showed that, in the end of the experiment, the dry matter weight was 12.87 g per plant: n and k levels were the highest levels in the shoot and root of the plants. the same occurred with fe in relations to micronutrients. the nutrients extraction by a population of 166.667 plants per ha occurred as follow: 115,36 kg of n, 7,88 kg of p, 55,16 kg of k, 13,14 kg of ca, 7,69 kg of mg, 7,10 kg of s, 38,89 g of b, 17,77 g of cu, 1165,49 g of fe, 52,09 g of mn and 47,15 g of zn.