Produção, qualidade e desempenho agronômico de mudas 'Plug Plant' de morangueiro produzidas com diferentes soluções nutritivas

Abstract

The plantlet production phase is one the most important steps in the strawberry production chain, since it is the basis for a better response to the technologies used in the later stages. The aim of the study was to evaluate the production, quality and agronomic performance of 'plug plant' seedlings of two strawberry cultivars produced with different nutrient solutions (SN), under soilless system. The evaluated factors were cultivars (Camarosa and Aromas) and different nutrient solutions, with the following composition of macronutrients in mg.L-1, to know: NS1: 147.1 of N; 46.5 of P; 32.1 of S; 221.3 of K; 106.3 of Ca; 24.3 of Mg. NS 2: 46.6 of N; 91.1 of P; 75.8 of S; 204.5 of K; 55.3 of Ca; 29.7 of Mg. NS3: 150.5 of N; 38.7 of P; 80.3 of S; 234.6 of K; 118.3 of Ca; 43.7 of Mg. NS4: 132.3 of N; 92.3 of P; 36.9 of S; 212.2 of K; 78 of Ca; 18.5 of Mg. The work was carried out at Embrapa Temperate Climate, Pelotas-RS, and was divided in two stages. The first step was evaluated production and quality of the plantlets, where the stock plants were cultivated in at soilless system and fertilized with four different nutritive solutions. The tips produced were collected, evaluated and rooted in substrate, resulting in plantlets as knowed plug plant type. In the second stage focus on agronomic performance of the plantlets produced with the different solutions was evaluated, also on soilless system. The phenological, productive and quality variables of the fruits produced were measured. Through the use of different nutrient solutions, it was possible observed that they influence more on the number tip produced by the stock plant, than the quality of the plug plant produced. However, solutions NS3 and NS4 are the most recommended for the plantlets production from Camarosa and Aromas cultivars, because they provide a huge number of tips by the stock plant. Regarding the agronomic performance of the tips produced from the different solutions, it was observed that the nutritive solutions effect applied in the nurseries stage were missed during the strawberry production cycle. Also in the majority evaluated variables was observed only the genotype effect. In this way the nursery may choose to use those nutrient solutions that provide a higher number tips per stock plant, because at the plug plant see performance, the nutrient solution effect does not affect the agronomic performance.