Automated management of nutrient solutions based on target electrical conductivity, ph, and nutrient concentration ratios

Savvas, Dimitrios; Adamidis, Konstantinos

doi:10.1080/01904169909365723

Cited by 88 publications

(56 citation statements)

References 23 publications

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“…It is well known that crop growth and yield are negatively affected by imbalance of nutrients in the growing media (Savvas, Adamidis 1999). In the present experiment, celery above-ground fresh weight, dry shoot biomass and leaf area were significantly reduced at low P treatments (0-62 mg/l) as a result of P deficiencies.…”

Section: Discussionsupporting

confidence: 48%

Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Li¹,

Wang²,

Li³

et al. 2010

Hort. Sci. (Prague)

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Li Y., Wang T., Li J., Ao Y., 2010. Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture. Hort. Sci. (Prague), 37: 99-108.A greenhouse pot experiment was performed to study the effect of phosphorus (P) on celery (Apium graveolens L.) growth, quality and nutrient uptake under different calcium (Ca) and magnesium (Mg) levels in substrate culture. Results showed that there were significant interactions between P and the level of Ca and Mg in the growing media. Celery above-ground fresh weight, total dry biomass, leaf area, and P, Ca and Mg concentrations in celery leaves significantly increased from 0 to 124 mg/l P application. The opposite trends were observed for root/shoot ratio, leaf chlorophyll, carotenoids, soluble protein, soluble sugar, vitamin C, and nitrogen and potassium concentration in celery leaves. Medium Ca and Mg level (Ca 320 and Mg 192 mg/l) significantly increased celery above-ground fresh weight, total dry biomass and leaf area compared to low (Ca 160 and Mg 96 mg/l) and high (Ca 640 and Mg 384 mg/l) levels. This study suggested that 124-248 mg/l P applications under medium Ca and Mg level were appropriate for celery nutritional requirements.

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Section: Discussionsupporting

confidence: 48%

Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Li¹,

Wang²,

Li³

et al. 2010

Hort. Sci. (Prague)

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“…Methods for preparing nutrient solutions for various crops, based on target pH, EC and nutrient concentration ratios, have been methodically explored and widely reviewed in the literature (Steiner, 1961(Steiner, , 1984Graves, 1983;Sonneveld and Straver, 1994;Schwartz, 1995;Resh, 1998;De Kreij et al, 1999;Savvas and Adamidis, 1999;Savvas, 2001;Adams, 2002;Sonneveld, 2002;Jones, 2005) and, therefore, are discussed only very briefly in this chapter. Solubility and compatibility with the specific substrate and irrigation water characteristics must be considered.…”

Section: Composition Of Nutrient Solutionmentioning

confidence: 99%

Nutrition of Substrate-Grown Plants

Silber¹,

Bar‐Tal²

2008

Soilless Culture

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“…Moreover, choosing suitable chemical compound styles is important to ensure the bioavailability of ions and the pH stability in nutrient solution. There are various nutrient solution formulae applied for the growth of cucumber, based upon different consideration about the development and behavior of cucumber (Steiner 1961;Savvas & Adamidis 1999). Yet arguments about which formula is the most efficient one for cucumber growth were still not concluded.…”

Section: Introductionmentioning

confidence: 99%

Hoagland nutrient solution promotes the growth of cucumber seedlings under light-emitting diode light

Cheng

2014

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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Light-emitting diode (LED), as an efficient, energy-saving light source, has been widely used in artificial light plant production systems. It is confirmed that the combination of red and blue LED lights shows good performance on plant growth and development. Based on the hydroponic culture system in plant production factory, selection of a suitable nutrient solution for specific crop would be very important. In this study, four different widely used nutrient solutions (Hoagland, Garden-style, Yamasaki, and SCAU) were tested in perlite culture cucumber seedlings during 40-day growth under 2:1 ratio of LED lights with 12 h photoperiod at 100 ± 5 μmol m −2 s −1 irradiance. The plant growth, morphology, pigments, biomass, photosynthetic characteristics, and nitrogen (N), phosphorus (P), and potassium (K) content were measured. Cucumber seedlings treated with formula SCAU showed weak appearance, less biomass, and reduced photosynthetic activity compared with those supplied with Hoagland. However, the differences between formulae Garden-style and Yamasaki were not obvious, but both of them showed significantly higher plant height, leaf area, total leaf number, and shoot N content compared to SCAU. It is concluded that formula Hoagland shows better performance regarding cucumber seedling growth under LED light.

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Automated management of nutrient solutions based on target electrical conductivity, ph, and nutrient concentration ratios

Cited by 88 publications

References 23 publications

Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Nutrition of Substrate-Grown Plants

Hoagland nutrient solution promotes the growth of cucumber seedlings under light-emitting diode light

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