Nitrogen accumulation and monitoring by strawberry stock plants for runner tips production

Abstract

The composition and concentration of the nutrient solution can affect growth of strawberry stock plants and runner tips production. The aim of this research was to determine runner tips production and nitrogen (N) accumulation by strawberry stock plants grown under five N concentrations in the nutrient solution and its relationships with chlorophyll meter readings. From September 2010 to March 2011, strawberry stock plants of cultivar Oso Grande and Camino Real were grown on sand polyethylene bags. Nitrogen was supplied by nutrient solutions at concentrations of 5.12 (C1), 7.6 (C2), 10.12 (C3), 12.62 (C4) and 15.12 (C5) mmol L-1. Runner tips bearing at least one expanded leaf were collected weekly and counted. The chlorophyll index (ICF) was measured fortnightly using a digital chlorophyll meter on the last second full expanded leaf of stock plant. A polynomial relationship was adjusted between the chlorophyll index and the N concentration in leaflets, which can be used for monitoring the N status of this crop. Leaflets and petioles are the organs of the strawberry stock plants with the higher N accumulation and runner tips production is not affected by N concentrations of the nutrient solution in the range of 5.12 to 15.12 mmol L-1.

Runner Production of Strawberry Plants in Soilless Suspended System: Nitrogen Rate, GA3 and Genotype Effects

“…In hydroponic growing system using sand as substrate, it was shown by Andriolo et al (2011) that increasing nitrogen levels in the nutrient solution had resulted in decline in most vegetative growth parameters of strawberry plants. In another study, Andriolo et al (2014) found no differences in runner tips production between nitrogen levels in the nutrient solution from 5.0 to 15.0 m mol/L. Similarly, Janisch et al (2012) reported on the effects of nitrogen level in the nutrient solution applied to strawberry mother plants in soilless culture on their runner tips production in the greenhouse.…”

“…Bartczak et al (2007) did not find significant difference between two strawberry cultivars in runner production but the average ramet fresh weight was different. In hydroponic growing system, Andriolo et al, (2014) reported no difference between the two cvs. 'Camino Real' and 'Oso Grande' in runner production.…”

Produção de estolhos de cultivares de morangueiro em função da condutividade elétrica da solução nutritiva

“…We concluded that increasing the concentration of the nutrient solution reduces the growth of strawberry stock plants and the production of runner tips and transplants is higher in the EC range between 0.8 and 1.1 dS/m. duvidosa e principalmente, atrasos na entrega aos produtores (Janisch et al, 2012;Andriolo et al, 2014). O cultivo sem solo e a produção de mudas com torrão permitem formação de mudas com alta qualidade, baixa infestação por patógenos e plantio na época adequada, proporcionando, assim, aumento na produção de frutos na entressafra (Giménez et al, 2008;Janisch et al, 2012) com maior lucro para os produtores.…”