AVALIAÇÃO DE MUDAS DE MAMÃO SUBMETIDAS Á DIFERENTES NÍVEIS DE ADUBAÇÃO NITROGENADA

Abstract

We evaluated five levels of fertilizer with ammonium sulfate in the formation of seedlings of Sunrise papaya variety of soil conditions of Mossoró-RN. The levels were evaluated: 0, 0.3, 0.6, 0.9, 1.2 grams of ammonium sulfate / litre of substrate. The experimental design was a randomized complete block, with five treatments and five repetitions, each plot consists of 15 plants useful in black disposable plastic bags, with 1.8 l of substrate by containers. Determined to two percentage germ, one to twenty days and the other trintas daysafter sowing. At 45 days after sowing, it was evaluated: height of seedlings, stem diameter, number of leaves, dry weight of the shoot, dry weight of the root system. It appeared that the ammonium sulfate caused delay in germination of seeds and seedlings affected the training of up to 45 days after sowing.