The Dependence of Calcium Transport and Leaf Tipburn in Strawberry on Relative Humidity and Nutrient Solution Concentration

Young plants of Begonia × hiemalis Fotsch `Schwabenland Red' were grown for 10 weeks at 60% ± 5% or 90% ± 5% relative humidity (RH) in growth rooms. Plants were watered with three nutrient solution concentrations (1, 2, and 4 mS·cm-1). Transpiration of the plants was 56% lower at the high RH level, while the concentration of the nutrient solution had less effect (10% to 20%). Plant dry weight, height, width, and leaf size were significantly higher at the higher RH. Dry weight, height, width, and leaf size of the plants were higher in the 2 mS·cm-1 than in the 1 mS·cm-1 solution when grown at high RH, but not at a lower RH. A further increase of the nutrient solution concentration either had no effect or was detrimental. The higher RH decreased the concentration of N, P, and K in leaves and stems of plants, but an increase in the concentration of the nutrient solution increased the concentration of N, P, K, and Ca in both leaves and stems. At termination of the experiment, the number of flowers and flower buds and percent of flowering plants was higher at 90% RH than at 60% RH. These values also were higher at the higher nutrient solution concentrations. Time of anthesis was not affected.

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Effect of nutrient solution concentration and NH4:NO3 ratio on Maranta growth

Scientia Horticulturae ◽

10.1016/s0304-4238(98)00225-8 ◽

1999 ◽

Vol 80 (1-2) ◽

pp. 105-112 ◽

Cited By ~ 4

Author(s):

Z Strojny

Keyword(s):

Nutrient Solution ◽

Solution Concentration

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Inmobilización y retención nutrimental en aserrín de pino como sustrato agrícola.

REVISTA TERRA LATINOAMERICANA ◽

10.28940/terra.v37i3.448 ◽

2019 ◽

Vol 37 (3) ◽

pp. 261

Author(s):

Joel Pineda Pineda ◽

Felipe Sánchez del Castillo ◽

Esaú Del Carmen Moreno Pérez ◽

Luis Alonso Valdez Aguilar ◽

Ana María Castillo González ◽

...

Keyword(s):

Nutrient Solution ◽

Solution Concentration ◽

Particle Sizes ◽

Similar Concentration ◽

Volcanic Tuff ◽

Pine Sawdust ◽

Low Concentrations ◽

Growing Medium ◽

Leachate Water ◽

Main Substrate

Pine (Pinus sp.) sawdust has been used as a growing medium for the cultivation of vegetables and ornamentals. In the present work the objective was to assess the immobilization or retention of N, P, K, and Ca in pine sawdust as the main substrate component by applying Steiner nutrient solution at different concentrations (20, 30 and 40 meq L-1). We used uncomposted sawdust, alone or in mixtures (70/30, v/v) with volcanic tuff of different particle sizes (fine ≤ 3 mm, medium 3-6 mm, and coarse 6-12 mm). For two months, leachate was collected daily, and every 10 days, the average concentrations of N, P, K, and Ca, as well as pH and electrical conductivity (EC) were measured. The effect of the interaction substrate × nutrient solution concentration on N, P, K and Ca in the leached water was observed. These nutrients increased in concentration in the leachate water in accord with the nutrient solution concentration and as the diameter of volcanic tuff particles diminished. Irrigation with 20 meq L-1 (2 dS m-1) concentration of nutrient solution reduced the concentration of N, P, K, and Ca in leached water below its concentration in the supplied nutrient solution, while irrigation with 30 or 40 meq L-1 (2 or 4 dS m-1) resulted in similar concentration in leached water up to 20 or 30 dat, but at 40 dat, concentration of these nutrients in the leached water was higher. Immobilization of N and P, K, and Ca retention in the sawdust substrate occurred during the first 40 ddt, related to an increase in pH (up to 8.6), a decrease in EC (until 0.5 dS m-1) and low concentrations of N, P, K, and Ca in the leached water.

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