Aduba o nitrogenada e pot芍ssica no estado nutricional de mudas de maracujazeiro-amarelo = Nitrogenous and potassic fertilization on nutritional status of yellow passion fruit seedlings

作者：William Natale; Renato de Mello Prado; Eliozeas Vicente de Almeida; Jose Carlos Barbosa

来源：Acta Scientiarum - Agronomy, 2006.

• nitrogenio
• potassio
• nutri o
• maracuja
• Passiflora edulis f. flavicarpa
• nitrogen
• potassium
• nutrition
• passion fruit

O presente trabalho objetivou avaliar os efeitos da aduba o nitrogenada e pot芍ssica, sobre o estado nutricional e a produ o de mat谷ria seca das mudas de maracujazeiro-amarelo (Passiflora edulis Sims f. flavicarpa Deg.), cultivadas em Latossolo Vermelho distrof谷rrico. O delineamento experimental foi o inteiramente casualizado, com 16 tratamentos e 3 repeti es, em um esquema fatorial 4 x 4, com 4 doses de N (zero, 150, 300 e 600 mg de N dm-3) e 4 de K (zero, 75, 150 e 300 mg de K dm-3), parceladas em 4 vezes. A unidade experimental foi constitu赤da por vasos (3,3 L). Ap車s 84 dias da germina o das sementes, foram avaliados a produ o de mat谷ria seca e os teores de macro e de micronutrientes. A maior produ o de mat谷ria seca do maracujazeiro esteve associada aos teores de 44 g de N kg-1 e 18 g de K kg-1 (parte a谷rea) e aos teores de 33 g de N kg-1 e 34 g de K kg-1 (ra赤zes), correspondendo 角 aplica o pr車xima de 340 mg de N dm-3 e 300 mg de K dm-3. The present work aimed to evaluate the effects of nitrogenousand potassic fertilization on nutritional state and dry matter of yellow passion fruit seedlings, cultivated in Red Latosol (Haplustox). Experimental design was randomized with 16 treatments and 3 replications, 4 x 4 factorial scheme design, whereas 4 doses of nitrogen were used (zero, 75, 150, 300 and 600 mg N dm-3) and 4 doses of potassium (zero, 75, 150, and 300 mg K dm-3). Fertilizers were divided into four parcels. The experimental unit consisted of pots (3.3 L). Following a period of 84 days after seeds germination, dry matter production, macro and micronutrient contents on vegetal tissue were evaluated. The highest dry matter production was related to 44 g of N kg-1 and 18 g of K kg-1 contents on aerial part. The highest dry matter production was related to 33 g of N kg-1 and 34 g of K kg-1contents on roots, which corresponds to the application near 340 mg of N dm-3 and 300 mg of K dm-3.