As interaˋˋes em grupos de experimentos de adubaˋˋo de milho

作者：Campos; Humberto de; Gomes; Frederico Pimentel

来源：Anais da Escola Superior de Agricultura Luiz de Queiroz, 1975.

DOI：10.1590/S0071-12761975000100002

the present paper has in view the study of linear interactions n%26apos;xp%26apos;;n%26apos;x k%26apos; and p%26apos; x k%26apos; in four groups of 33 factorial experiments of fertilization of corn, with n, p and k, involving 117 experiments and 3,159 plots. the groups were: group 1: 53 experiments, carried out in ribeirˋo preto (sp), with the following levels of nutrients: 0; 40 and 80 kg/ha of n, p2 05 and k2 o. group 2: 41 experiments, carried out in the state of rio de janeiro, with the levels: 0; 30 and 60 kg/ha of both n and k20, and 0; 60 and 120 kg/ha of p2os. group 3: 10 experiments carried out in the region of triangulo mineiro (mg) with the levels: 0; 75 and 150 kg/ha for the 3 nutrients. group 4: 13 experiments carried out: 7 of them in triangulo mineiro, and the other 6 in patos de minas (mg), using the levels: 0; 60 and 120 kg/ha for each of the 3 nutrients. it was observed that only the interaction n%26apos;xp%26apos; using the levels 0 and 1 in group 1, and p%26apos; x k%26apos; using the levels 0 and 2 in group 2, were significant at the 5% level of probability. then, it is possible to conclude, with a wide generality, that in 33 factorial experiments of fertilization of corn, for moderate levels of nutrients, the interactions have little importance. in most of the cases, interactions are secondary when compared with the main effects of nutrients.

• 出版日期1975