Manejo do cultivo de coentro irrigado, submetido a diferentes substratos e coberturas de solo, em um cultivo de base agroecológica

Abstract

The use of mulches can be a sustainable alternative for growing coriander (Coriandrum sativum L.), providing greater moisture retention in the soil, reducing labor and the need for constant irrigation. The aim of this study was to evaluate the cultivation of irrigated coriander using different substrates and soil covers in an agro-ecological system. The design of the experiment was entirely randomized in a 3 x 3 factorial arrangement, with four replications, the first factor being (SUB1=soil + pig manure), (SUB2=soil+worm humus) and (SUB2=soil+sand), mixed in a 3:1 ratio. The soil was placed in plastic pots with a capacity of 0.5 dm-3. The treatments were based on water demand, two pots of each treatment were weighed weekly and irrigated once with water. At harvest, at 45 days after sowing (DAS), the number of leaves (NF), plant height (AP- cm), fresh mass of the aerial part (MFpa-g) determined by weight on a scale with a sensitivity of 0.1 gram. at 15-45 DAS and the height was obtained with the aid of a graduated ruler, from ground level to the end of the leaves. The statistics were run using the Sisvar program version 5.6 (FERREIRA, 2014). Significance was identified only for fresh mass of the aerial part (MFPA) and number of leaves at the level (P<0.05) between cover and substrates. SUB1 and SUB2 provided greater plant heights in the order of 19.4% compared to SUB3 with soil cover C1 (brachiaria grass), which did not differ from the coconut fiber mulch, the MFPA responded significantly in the composition of SUB1 and SUB2 with Brachiaria mulch in treatments T1-T2-T3, with the best averages and the highest MFPA production of 25.19 %, confirming the availability and cycling of nutrients. The coconut fiber mulch, due to its filamentous ligaments, contributes to the binding of microorganisms and the multiplication of the population present. For high yields in coriander cultivation, we recommend covering the soil with Brachiaria muching straw in substrates with pig manure and/or worm humus. Prospects for other mulching species, mulch density and decomposition levels can be analyzed and added to in this study.