Study of the Rooting Potential of Humic and Fulvic Acids, Amino Acids and Seaweed Extracts in Maize Culture

Corn is a commodity of great expression. For high yields, it is necessary that plants have availability of resources to develop and rely on vigorous root systems and adequate initial development. The inclusion in crops of products with humic and fulvic acids, seaweed and amino acids, is among resources. The objective was to present the results of a study conducted, the effect of the use of amino acids, humic and fulvic acids and seaweed associated with plant nutrients in the initial development of corn (Zea mays L.) cultivated in pots. The trial, with corn cultivate Bandeirante, was conducted outdoors in the Department of Plant Nutrition of the UniPinhal Agronomic Engineering Course, in Espirito Santo do Pinhal—SP (latitude 22°06′57″ N, longitude 46°40′58″ W and altitude of 892.7 m), from March to April 2018, in randomized blocks with eight treatments and four replicates. The products studied were applied in two periods: V1 and V3, by drench. Each plot consisted of a 20 L plastic container containing soil (classified as Acrisols-World Reference Base/FAO), corrected for fertility. At 55 d after germination were evaluated: root mass and length and culm diameter. All the results were treated statistically (analysis of variance and Duncan test at 5%). The treatments applied in the trial benefited the root development and culm diameter; humic and fulvic acids + N, P, Mo and Co + humic and fulvic acids + N, P and K, when considering all the criteria, was shown to be the most efficient.