科研之友
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摘要
O presente trabalho avaliou o efeito da aduba o organica na produ ototal de batata-doce, por meio de um experimento realizado no per赤odo de julho a novembro de 2007, na Esta o Experimental de Lagoa Seca, PB, Brasil. O delineamento experimental foi em blocos casualizados com cinco tratamentos (0, 3, 6, 9 e 12 t ha-1 de cama-de-avi芍rio), em quatro repeti es. A parcela foi composta por quatro leiras de 3,6 m de comprimento, espa ados de 0,80 m entre leiras e de 0,30 m entre plantas, sendo colhidas as duas fileiras centrais. As vari芍veis estudadas foram: produ o total, ra赤zes de tamanho gra迆das e mi迆das de batata-doce. A produ o de ra赤zes gra迆das, mi迆das e total por planta (14,20; 3,84 e 18,03 t ha-1) de batata-doce responderam de forma linear e positiva 角s doses crescentes de cama-de-avi芍rio. Aaduba o com cama-de-avi芍rio aumentou a produ o de ra赤zes gra迆das, mi迆das e total de batata-doce. The present study evaluated the effect of organic fertilization inthe total production of sweet potato. The experiment was performed in the period between July and November 2007, at the Lagoa Seca Experimental Station, Para赤ba, Brazil. The experimental design was randomized blocks with five treatments (0, 3, 6, 9 and 12 t ha-1), in four replications. The plot consisted of four 3.6 m long ridges, spaced of 0.80 m between ridges and 0.30 m between plants; the two central ridges were harvested. The variables studied were: total yield, large and small sweet potato roots. The production of large and small roots, total yield per plant (14.20, 3.84 and 18.03 t ha-1)of sweet potato, responded positively in a linear fashion to increasing doses of poultry litter. The fertilization with poultry litter increased the yield of large, small and total roots of sweet potato.
