Fontes de matéria orgânica e lâminas de irrigação do crescimento, nutrição e produção do maracujazeiro-amarelo ev.BRS GA1

Abstract

The objective was to evaluate the vegetative, nutritional and productive characteristics of the yellow passion fruit cv. BRS GA1 under irrigation depths and sources of organic matter. The experiment was carried out in randomized blocks, in a 2 × 5 factorial arrangement, with four replications and three plants per plot, totaling 120 plants. The sources of variation refer to carbon sources from bovine manure and sisal residue two years after shredding. The carbon sources were applied in the preparation of the pits to raise the initial content of soil organic matter from 0.73 to 3.00%, taking bovine manure as a reference and five irrigation depths relative to 100, 83, 66, 49 and 32% of crop evapotranspiration (ETc). The number of days required from transplanting the seedlings to pruning the main stem (PTPHP) were counted. The leaves were collected to determine the levels of N, P, K, Ca, Mg and S in the leaf dry matter. In the first harvest started in March/2019, the fruits were harvested daily, packed in plastic bags installed on the espalier stakes and twice a week the mass was counted and obtained on a decimal precision scale. At the end of the harvest, the number of fruits harvested per plant, average fruit mass, production per plant and yield or productivity were recorded. The results were submitted to analysis of variance by the F test at the level of 1 and 5% of probability. The means relative to the organic sources were compared by the F test, which is conclusive for unitary degree of freedom, and the data corresponding to the irrigation depths and the interaction irrigation depths × organic sources by polynomial regression (p<0.05). The yellow passion fruit cv. BRS GA1 fertilized with sisal residue needs a shorter period between transplanting and pruning the main stem, promotes greater growth in height and stem diameter even when irrigated with a water depth of 60% ETc at 45 DAT. Plants fertilized with cattle manure and irrigation with a water depth of 100% ETc contribute to the highest number of fruits per plant, average fruit mass, production and productivity. However, 00000when fertilized with sisal residue, it obtains higher values of number of fruits, production and productivity, even reducing the irrigation depth to 53% of ETc.